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HomeMy WebLinkAboutOrdinances Book 12, Page 129, No Ordinance NumberSTANDARDS FOR.TFIE INSTALLATION, MAINTENANCE ANp.', USE; OF. Pit'ING, APPLIANCES AND. VITTINGS J" FOR CITY. GAS Foreword. The main part of these standards includes those provi- sions considered appropriate for code use. Provisions of a supplenientary;or, informative character are presented ' in the ppcndii :'s e. Thesea provisions are intended to apply to the installa- tion of gas Pipingill buildings and the use of city gas, that is, natural; r(nd,. manufactured or mixed. They do not apply to large 'underground gas distributing systems leading up to buiJdirigs-and such parts of a gas system as the manufacturing plants; etc, which are the proper- ties of gas compinics, Liquefied petroleum gas installa- tions are covered by the separately published Standards on Liquefied Petroleum, Gases. 100. GENERAL, e •• 101. Definitions of Special Terms. The following definitions give ,the meanings of the f? terms occurring in jhese'.rtdes. Terms not defined will - -tie understood to have their .usual meanings: The term "administrative `avt}torily" as .used throughout the following good; practico requirements shall be defined as the mmnicipal official. required by law or ordinance to supervise. the installatinoof gas piping and gas appliances, his assistants or agents; or in the absence of such an official,'iltc local, gas company. (b) Q+ s FMER means .any individual, firm, wrpora- tion, or .company. which either in person or through a representative. is engaged. in apd•is`.responsible for gas fining or the conntction or installation pf gas appliances n•ijhin a"building - derc' ,7 e. �Sennpr'jJaes not 'nrludc y, assistant Kho Worm 'nJn the supen•Iti+. of a gas filter, inch ,a a sas fiuer.•s Helper. A licensed ga. fitter, or a mnsler plumber or journeyman plumber CITY GAS 1 3 the service extension or other source of supply;:anr) the outlet of the service meter to the house piping., . (k) SERVICE METER (or meter) means the, insirumedt installed on the customers'!premises by the gas company for measuring the gas supplied to the customer, the read ings of which are used as a basis for computing. the cos tomer's bill. (1) HOOSE PIPING means the system of.piping. within a building, either exposed or cohegdicd;. which; conveys gas from the outlet of the servim:nleter;'io appliahces.at various Places throughout the building. Any, piphig.nn- derground which contains in 6511170 gas is also hoose piping. ,. (m) RISER means any vertical pipcavhich conducts the gas upwards. (n) BRANcu LiNEs (or branches);`'mean 'diose. pipes which convey gas from a supply line.to appliances.: (o) OUTLET means a threaded 'Connection.ill a piping system to which a gas -burning; appliance is:'pr may be attached. , (p) DROP means any vertical pipe or nipple which con- ducts the gas downward. (q) APPLIANCE means a gds�.apphanec. which utilizes gas fuel to produce light, baTt,or. power; •11 (r) LIGATING FIXTURE i�Caiis.dn appifance which sup- plies gas to one or more liW.7imp,;burncrs; (s) SECONDARY ITETER.'itl4ma"pnl meter' installed at a point following thescrvite'-titetCt3?tlle:rg4tlings of which are not used as a basis for cbthputfti); the customer's bill. It is to be considered as a p,;tTfof the bou'se piping system. (U SEavice COCK means any shut-off on a service or service extension between the brain acid -the meter cock. (u) CURD COCK means'q service cock'. which is placed at or near the curb, outside of the building. .' (V) METER Cocx means the shtftrofl' adiacda to and controlling the gas to a shilgle service meter, (w) LINE Cocx means a "shut-off installed ill the house Piping to control the supply of gas tO' al� or any'seclion of lite Piping system. .. Nor.: "Cook" mean. any valve u.ed fore 44 '-d iud on sv. + GL ER;1f<L7, ;102.' :General' Requii'olnents.' The followins'ic. g -barules"_outhne in T general way wbat'ts nece,saty,.to insure a safe-and'satWactory instaf- ldifon!lof.house piping. The detailed rcquirements given later are means of accomplishing the fupdantentaLycquire- menls hese given. (a) Piping shall be constructed and installed so as to make a t(Oedble, substantial and gas tight system!, (b) Piping shall be of a size and so installed' is to ' provide a supply of gas sufficient to meV tlfe ;matummn demand without undue lwa,of pressure bctwecm:ehc' street service and the apPlian`cc;o'eappliances. , (c) Piping shall 1,e so installed as to prci-ea an,eccum- ulation of condensation from interrupting the Ilow,of'gas. (d) The building structure shall not be weakened by the installation of Ute piping. {e) No unneee*yy hazard.frOm escaping 'gas -or fire shalL,be incurred during tlu-jnstallation• or repair of piping. . 'a:.. (f) The system shall C Ict't ;.tSy,.tlle gas fitter in a 'sgfe and satisfactory condition Inc pse'by an dnskillcd-pel3on. 103. General Precauhoas''�� r (a) WORK WITH G,vi', t.Yb".•Gas-fitting, 4phancc in- 1131i on and repair work shall be done with"the gas turned off so that the danger front Ica6-tgc: dpr4tg.� the . }cork will be a minimum, except as provjdedl-irt.para- graph (b), (b) R'oRKlxG ON Plres- rILLED %VITH ;Gas: Work which involves removal of an appliance or unscrewing of a cap, plug or Pipe which will open an outlet ant permit the escape of gas shall never be done without shutting the gas oR, except in emergency cases where interruption of the service is fntpractieable, and unless the work can be done without darpgr to Hie and property with the gas on. (c) ONE 'MAX SHALL NOT WORK ALONE. ' One man shall not work alone .m ajiy (situation where tlic nature Of the• work is such as to xxpose him to danger of asphyxiation. �bSE OF mNo attche candles or T flame'- orother sources ofANDt ignition shall be used by a gas ftttcrveehis helper when working 129 130 CITY GAS on meters, piping.orappliances filled with gas, except for flumes. work A flames shall necessarily I,Volves u ed in searching use se clunsuch for leaks. In no case should a flame be allowed to touch a meter, meter ;connection, or other piping. (e) SntoxiNe. A gas fitter shall not smoke while working on piping which is filled with gas, or has been filled with gas, nor permit others to smoke while near such work.: (f) SAFESY LIGHTS To an PROVIDED. Artificial lighting for use in- connection withsearching for leaks or work in gassv atnhbspheres shall be restricted to approved elec- tric hand flash lights or other electric lights controlled only by witches located outside the gassy aiea, Every gas fitter shall be equipped with an approved electric hand flash light. (g) HANDLING FLAMd"Atim LIQuius. Alcohol, gaso- line, and other flammable liquids, including the liquid which is removed from meters or from drips in gas pip- ing, shall be handled with proper precautions, and shall not be left by the gas fitter on the premises of the cus- tomer. The ordinary fitter's torch or furnace shalt not be left within the premises from the end of one working day to the beginning of the next. 104. Gas Fitting to be Done Only by Qualified Gas Fitters. (a) The installation and repair of piping and apPli- ances shall be done only by qualified gas fitters. By the term qualified gas fitter is meant one who is experienced in the work, familiar with all precautions required, and who has complied with all the requirements as to quali- fication, registration, licensing, etc., of the proper admin- istrative authority. This applies to the installation and repair of electrical apparatus and wiring, heating and ven- tilating equipment, eta, where the same involves work on combination gas and electric fixtures or appliances, or where electric apparatus or other equipment is attached to or forms any part of the gas fitting system. Such work shall be done only by a workman fully qualified in both of the skilled trades involved, or by an electrician or other craftsman working under the supervision of a ,qualified gas filter. a CITY GAS 205. Use of Water Prohibited. In no case shall gas pipe be filled with water, acid, or other liquids to test or tighten leaks, except in the appli- cation of a soap and water solution to pipe exterior. If it is found that water has been used in the pipe, it shall be sufficient cause for the inspector to condemn the whole line of pipe. 300. SERVICES AND METERS. 301. Work by Gas Fitters Between the Main and the Meter. (a) If gas is leaking from any part of the gas supply system mentioned in Rule 104 (b), a gas fitter not in the employ of the gas company may make necbssary tem. porary repairs and notify the gas company to;make per- manent repairs. Any concealed part of a gas supply system -up to and including the service meter, when installed by a gas filter on the premises of a prospective customer, shall be re- ported to, and shall be inspected by, the gas company before it is concealed, either within the building or. under- ground, and before it is connected with the main or ser- vice pipe which contains gas. (b) Under no circumstances shall a gas fitter not in the enhploy of the gas company be permitted to open or make connections with a main, service pipe,, or other part of the underground supply system which contains j unmeasured gas, except with the consent of tl"e,gas com- pany and in the presence of its authorized mprescntativc. (c) A gas filter may disconnect the outlet of a service meter from the house piping only when necessary. A gas fitter shall not disconnect the filet of the meter front the service extension nor move the meter on its support. If the gas company is to tun" on the gas at the completion of the work and the use of the meter outlet is unavoidable, a gas fitter shall not remake the joint at the outlet of the meter, but shall leave this work for the gas company representative. (d) In case any work done by a gas fitter discloses the need for repairs or alterations by the gas company on any part of the system containing unmeasured gas, the gas company shall be notified promptly of this fact. 6 GENERAL (b) No gas filter, unless in the employ of the gas com- pany or having a permit from the gas company, shall repair, alter or open the service pipe or service exten- sion, or set or remove.the service meter, or do, any other wort: on the parts of, file gas supply system .up to and including this mctcrai;-.', 105. Plans and Specifications. Plans and spceificii6shall be submitted to the proper administrative authgrity:for approval.ras'required. 200. INSPECTIONS'AND TESTS. ' 2ql. Test Required for Concealedr�Piping.. ,(a) Gas shall not.be turned'on any new�syslcm o(f:on- cealed piping nbr any concealed. extension of 'an exjsting System until properly inspected ana tested"in the-pres- cltcE of the proper, administrative authority, or by a.'rep- rvSSntalive of dile gas company;'. (See ;Appendix, Sec - ti oq 9e. ;t �"I", In the%mitallation df dew'Piping;}all work shall bob' sdbjcct to the apppvi!: & the fdspectipn deparimcnt.hav-, ing jurisdiction ortbGs'gas company,.by ,whom the work -sliall be inspected'betorEpiping is concealcdh 202:. Installations1br� Stores and.Places of 'Assembly. ' The gas company dor inspection .department having jur- isdiction shall be consulted in advance and shall .pass on 'alf'details of; installations which differ..from the ordinary' tiomeslic practice in.volunic of gas;requircd'or any special features. .; §peeiSl.attention shall be paid to: exit and stair lights, rdnioirrcontrols,'fire and accident conditions; (re- quent'.ins*'ti',nn shall be made. 203. Tcihng for, Tightness. Piping�sWi, bc,testcd. for tighln4s!h'p meats o[Air or gas pressur-i. -, Such tests shall b8made in an. approved manner{ (5ce'Appuhdii:,': Section *1 264:'..Searching for'Lea)cs. . In no case shall a Maine be usedwhcu searching for a leak.. (See Appen* 7Seetion 5 for recommended pro. cedure.) t -t , S SERYICE.S AND METERS . 302, Pressure •Regulation. (a)'.Wllcrc the gaa�piessurc in the strect'n,pun excess of one pound•'peq square inch, an approved pressure regulator, of sufficient,size sliall be mstillle theservice pipe to, prevent `Pressure in excess -e pound per square. -inch being introduced into thty'* piping, This is not intended to prohibit. the use of;hl pressures for industrial application. (b) Pressure fluctuations to the extent .of iiidking'I able. flame extinguishment constitutes a' pronpiiticed ard. Whert such conditions develop. pcompt: mea. shall be taken to,correct them, (c) :1 pressure ,regulator or govGtnor.cequiringga to th6almosphere far successful operation,; and contr( the gas,supply to a,building, 'ihoulTbc i?quipped w vent pipe leading to the outer, air. ,.:1N;lls'shall be ployed to prevent water front:cntering.tliis:,piper,and to prevent stoppage of it by:•insects , 61".fareign. m, Gas appliance pressure regulators: rellifin accgss t� atmosphere for successful operation ,may e,vented a eombustion.cliatuber adjacent'(ti.a.'Eomitaritlybu! pilot. 303.', Interconnection of Piping rSystems.�,: Piping systems.wnch are supplied by:.separate n s4all not be.ifnterconnected. Under sbitA6 condi up idcd Prgper. .precautions ar5.o1iscrved.�i4dustriai �.tnipptcrcial, Piping systems may lit<excmpfed. from b- ,M,:4g0. PIPING,VALVES AND FITTINGS iQ1r Quality of. Materials. 4' () Standard- full weight tvroughfiion'kcir steel frc 'from defects sball be used in coriveyipg;_gas t( inside of buildings. Approved non-fcrroR%iterial be used for snaking service connectionslL'$uildings. proved seamless drawn well annealed.' copper, bra. other approved non-ferrous tubing .vi;lih.approved fii may be used for permaneat connedidiis of stats, appffanccs. All. fittings for -wrought" -iron or steel (except stopcock's or valves) shall ate of best q� malleable iron. Tl"reads shall be :itt accordance wit ';.,,American Pipe Tjhread Stoddard),`. •e.3 ., .. .. .. 131 CITY GAS 11 CITY GAS g. `f0�(�`, �' pIPI\G. V.1LVF.S A.�'D F[TTI�GS,• (b) Wilere' necessaiy, due to corrosive conditions, ip "coated. p of condensate will shut off-ihe flow of gas hcfore it will Drips should uq4 be located ing shall be suitably run back into the meter. is likely to freeze. (c) REPLACEME\'r. GF.DEFECTME PIPE OR Firr1NGs. In where the condensate . (b) Such drips shall be installed only in such locations no case except ps;a ;tofnporary measure is it permissible to. repair defects :.in, pipe or• fittings, but, -having been that the outlet of tile drip will be readily accessible to The any drip used I= the defective plpc:or.$lting must be removed and permit cleaning or emptying. size o[ dcterynincd by. the capacity and the -exposure of replaced with. perfect material. NO �-` (d) Use. or Oib Pm£: F 'second-hand pipe shall be shall :h'o, the piping which drains, to it. used except that When- ielyuihding is undergoing recon- 406.' :,Branching. slruction or repairs snclf .old gas pipe as is taken out and All branches shiahl be taken from the top or side of found to be in, perf&c.condition may be rerunin that horizontal Piping. building. .. •.. �: 407. Fitting at Lower End of Vertical Supply Line. 402. S. " uppSrtingPipe The lower end of a vertical supply line, ii•accessible, (a) PIPING YOM Uirom'STRAIN. Piping 'shall bc'in- shall be equipped with a ted (or cross) hai-ing a full - stalled so that iti-suG'cctei'to no u necessar str' nl. sized, plugged opening looking down (o,permii access for Where •ceiling ftxlvrod are hqug- from drops,. the outlet removing stoppages. fittings shall.be securchv and rigidly fastened:`,'(Sce Ap-. pendix, Section 2P [c):)'.• ` 408. 'Relation to Electric Wiring.;, - The installation of piping in relation to electric wiring 403. Cutting Timbcri.: j:� shall be in accordance with the Natidaal Electrical Code.' \\'lien, in running_'Pipe,� it is necessary to cross wood -shall 409. Lines Supplying Pilots Eor Oil Burners. joists or brains, they be notched as little as -'Possible, but never to a. depth of more than one -filth of the depth Lines supplying pilots for oil burning appliances shall' size oI the.timber.This notcfiibg shall be as close as Possible be accessible,. of not less than %-inch standard pipe temperatures. to a point of support of -.the timber, and shall in no case be further.from'a suppor6han one-sixth and shall not be exposed to extreme, Other Larg - 410. Gas Engines or e Appliances. of the total un- suppotted span of the timber. Where feasible, the piping pipe to supply gas. to a ga s cnpine or other appli- shall : run so that only: timbers having the shortest .The ante of large consumption or higF %;omentary demand s spans shallbecut. s shall, 'in every case, be carried back,far enough indepen- _ 404. Piping to be Graded.- 1. dent of other piping, or other procLiun be made, to ensure the other appliances is not disturbed All piping "shall be graded, preferably -not lesi than that the.pressure at by the operation of this appliance to the extent of -affect•. Vi -inch -in -15 feet to precept traps. All horizontal'lincs from shall drain to risers and .from the risers to the meter ing satisfactory performance. - Each shall be equipped with. an approved unless;the-structure'. is so as to prevent this; -but this r le does'noc'pcimit violation of Rulc4403. gas engine anti -fluctuating device installed as mar -the cngme,as flue 405. afeguarding'Trapped Piping.;, practicable. A gas bag, if used to reduce pressure - mations, shall be enclosed in a substantial Sas-tigbtr metal (a) kdrip,•fn which liquid condensate may collect and be rcmDvcd, •should'be provided at any in lineno drum ipe used for ruction, meed eo:`ane outer-air r uue fa approved point the of pipe whcrE;condensate would collect. Where end equipped with a protected turned-down.filting to Pre, .conden- sation in house, pipingis excessive;:a drip should be pro-, vided at the outlet of the meter. Ws drip shoull•bc io vent clogging. The exhaust pipe of a gas engine shall be run to the installed as to constitute a trap wherein an accumulation outside air, Preferably above the roof. The location of gas lighting f�ciureg'shalhtiesOch CITY GAS 11 12' :\I'PLl'.\VCF.S 411. Cocks and Valves. ,to reduce the supply of gas under conditions which wcuW An outside valve shall be installed on every gas service' I b6ild1ed„i•e'dlj: in its reductionunless ocheg roue are the Bevel' meat, dangerous tem- Pipe regardless of size that supplies large stores or fac- :Prt?Hi!red'..to;lkevcnt (xrt;tures;.:pressures or the escRpc of gas. ' t ories. or laces of P public assembly such as churches, ld`electncal features of the sy#em'shouW be in" S, theatres, motion .picture theatres, schools, and hospitals, ' and on every iii ice 2% inches larger in cordance_ <vyih the .1Qatipna� Electrical. Code. : r ' pipe or diameter. SO4i Supporting Appllancea ��'••. ,t-tiw- 412.' Closing Outlets. Each, outlet shall be securely closed Appliances shall he adeq}i•.�(ely:;supported and so, cgtYr. on the gas-tight with a threaded iron plug or cap immediately after installation, netted to the piping'as,. got'£o gxe# undue strain connection ''' and shall be left so closed until an appliance is installed y,•` ' thereon. In no case shall tile e outlet be closed with lead Ventilation. Son. Ventil '� caps or plugs. No appliance shall be installed in a room in tvhichitbe When an appliance is removed from an outlet, and the facilities for ventilation do not permit the proper;Som- outlet is not to be used again immediately, it shall be bustion of gas under normal conditions of use. securely closed gas-tight with a threaded iron plug or caP•506. Convenience of Shut-off During Lighting..-- ,-:,., 'A A gas cock or shut-off shall be easily, accessfblc' Aiuf ' 500. .APPLIANCES. within convenient;,reaching distance' when lighting.# 501. Only Approved Appliances to be Used. '' burner, '• ' 507. Air Under Pressure}; •, No appliance and no device, attachment or aceessory to any appliance in t When air or oxygedvnifcr pressure is used in connee- When which can any way affect combus- tion or safety shall le installed unless it has been with any gas supply::; effective means shall be.pro- ap- Proved within the meaning of .the definition of the term '..d to prevent the air or oxygen front going back into given in these regulations. When, because of the novel •as piping. or unusual character of an appliance or device, no provi- Location of Gas Fixtures and. Applianees:"^;.•; sion .has been made for its testing and approval by offs- The location of gas lighting f�ciureg'shalhtiesOch dally recognized agencies; the approval of the prorrr constitute a fire hazard •to persnds Or pruPcr4k. administrative authority shall be secured before such an fixtures less than five frit -from. plastered 231- appliance or device shall be used. verbead woodwork or close) _thou five iticlies 502. Attachments. 1i .ced,walls or woodwork shall tie.. -protected by (a) No device or attachment shall be installed on any apPliancc iyhich may in impair �; .b stviiiging or folding gas bracket shRIJ lie used. any way the combustion of the gas., ,a's appliances shall be installed'so.thar. their coil-. . ' " (b) Any combinatioli.of appliances, attachments or de- oPerdroh, will not raise the temperature -of sur- . g com117,iistible material or construction mere than vices used together in any manner shall sleet the require- menu which apply tio.individual fi�flreflllelt above normal rGOnl:teillPCratnrC. See f appliances. 503. Electric Ignition and g Control Devices. ­5 Hans 1201 to 1107 inclusive ohc'Ovildi.s mm d Gngnal IIoaid of Fm L•ud—ritars didoo) fol further detail'. No devices emPloying.or depending upon an electrical+cceslifiur," current shall be used to control or ignite a gas supply if of such a character that failure of the electrical Appiiattrks;: li�(l be located so that,they will be current could result fn the escape of unburned gas or in failure accesefirla:eration, ret:air and"adjustment. .• ,0ll- , 132 CITY GAS 13 510. Appliances with Closed Bases. ,r Appliances with closed bases in which no provishrit'is made for the circulation of air below the burner 'boxes shall be properly insulated from comptiitible floors: 511. Connection of Appliances with Flexible Tubing. (a) Only appliances which are necessarily portable or which have to be moved from placo;to place or which require a vibration joint, may be connected with flexible tubing,, On such appliances the slittl-off shall be (d;tJhc solid connection.or piping only, mid'not at the app liaiice end of `the tubing; industrial equipment is excmpt from this provision. (b) Only approved tubing of proper design and'good quality shall be used, and it shall' -be securely, attached to each end. (c) The key of the shut-off on;6m independent connec- tion shall not be within 6 inches of the.key of anyother Shut-off. In such an installation the 'keys shall 'be in directions perpendicular to each other so that the'possi- bility,of the accidental turning on of the gas at the .wrong shut-off will be lessened. (d) A shut-off shall not be placed close to the floor or in other position where it may be turned on by accident. (e) A wall outlet to which an appliance is to be coh- nected with flexible tubing shall be so placed as -to reduce to a minimum the passing to and fro across the tubing. Where flexible tubing is used, it shall be of the minimum practicable length. Extending tubing from one. room to another is prohibited. i (f) Where an appliance, such,as agas iron for indus- trial work, is always used in the same location, but its operation demands a flexible connection, the flexible tube shall be permanently attached at the supply end by a threaded or other secure metal connection, and the appli- ance end shall be provided with a secure metal joint, which can be conveniently made and separated,.in pref- erence to a rubber slip end. (g) Where the tubing is likely to be subjected to ex- cessive temperatures, either through accident or because of the special nature of the appliance, only tubing prop- erly protected or made up of incombustible material shall be used CITY GAS is (d) No furnace sbould be installed in the floor of any aisle or passageway, of any auditorium, public hall or public'assentbly room,"'or'cgress from any such room or space. . (c) The:floor immediately surrounding the floor fur. nace.shall be reasonably level. When heating two rooms having different floor levels, the furnace shall be installed in the room having the lower floor. It is also well to locate the furnace near the steps, if possible. Where a dual -wall -register, furnace is installed between rooms hav- ing different floor levels, the furnace shall be installed at the lowest floor level with an approved vertical extension to the upper floor level. (f) The floor around the furnace shall be braced and headed with a framework of material not lighter than Elie joists. The inside dimension of the framework shall be approximately %-inch longer and wider than the"fur- Race to be installed. (g) All floor furnaces, including those having single or dual wall register outlets, shall be installed as approved without alterations, extensions, or changes of any kind in the furnace. (h) All furnaces shall be equipped with a gas pressure regulator, which shall be adjusted so the gas input does not exceed the approved input rating. (i) If automatic operation of floor furnaces is desired, care must be taken that a model approved for use with anautonhalic pilot is employed. No automatic pilot shall be installed in Elie field on a floor furnace that has not been approved for such equipment. Automatic safety pilots are recommended for all floor furnaces. \ore:See Section 1:01 of the Building Code Recommended by the National Board of of Underwriters (1943 Edition) for Miller dewily. 515. Gas -Fired Boilers and Furnaces and Conversion Burners for House Heating. (a) , GENERAL. (1) These regulations are intended for application only to low pressure heating systems. Such systems shall be defined as those wherein the pressure does not exceed 15 pounds. APPLIANCES 512. Ranges, etc, (a) Raoges, water. heaters, space heaters, clothes dryers, incinerators, -:wall heaters, etc., shall not be in- stalled'in rooms}%vhere the facilities for ventilation 'do not permit proper:combustion of the gas, under normal conditions of use. ' (b) Appliances of this charactershall be designed with a heat deflector or burner tray to .prevent incandescent particles of dust, carbon, etc., from falling on to the floor and igniting combustible material. 513. Water Heaters.' (a) RELIEF Fon OVERHEATED WATER, No water heating appliance shall be installed in a closed system of water piping, unless a water pressure relief 'valve is provided. 514. Gas -Fired Floor Furnaces. (a) Single register gas furnaces 'to be installed in floors, now commonly used in mild climates where warm air furnaces with multiple'registers are not to be con- sidered essential, involve problems not found in ordinary heating appliances. Where permitted, such furnaces shall be specifically approved for service in direct contact with combustible floors: in which they may be installed. Ob- servance of Rules 505, 508(c), 509,..and 518 is essential and, irrespective of gas input, compliance with Rule 516 shall be required." .. (b) Installation fn the lowest floors of buildings with- out basements involves special problems relative to venti- lation, as well as to the accessibility for installation, in- spection and maintenance. Ample clearance for the above purposes shall be required,and neither flue pipe. nor fur- nace casing shall .be in contact with earth or damp'mate- rials, The location and installation of floor furnaces should be such as; to minimize the possibility of being flooded with Mater,-. - (c) Owing to.space limitations, the size of the regis- ters of these furnaces is such that surface temperatures of the discharge outlet are higher than ordinary warm air registers. This makes it necessary to take proper precautions to prevent covering the registers with com- bustible material and to avoid injury to persons when furnaces are operated at full capacity. 16 APPLIANCES (2) No:gas-fired boilers or furnaces for heating ;a'pgy ; building or buildings shall be installed and no bolter: oi;,' furnace designed for other fuels shall be converted to -tfie s)'i• use of Sas fuel unless the following regulations are com-'1Fit' plied with. (3) thher a thermostatic pilot•;light, �s4'constructed and adjusted that no gas can -flow through themain burner unless tile r e pilot light is.:burning, or some other similar type of safety device serving this same end.shall. be employed. The operatio)i of the safety device.iliall not depend on the closing of an electric circuit t'yj9fiut' off the main gas supply. (4) *The boiler or furnace shall be equipped with ;Safety devicesarranged to m limit high steapressures or' -water temperatures or high ;air temperatures: in warm -air fur- naces which are equipped with air cimiilating fans. It is recommended that in'steam. or vactit6..vapor boilers means be provided to guard against ,fikitig a dry boiler or one in which tie 'water is dangetotisly'.fow, and that in warm air furnaces not equipped;with7 air circulating falls means be pravided to guard against'cxce@sive tem- peralures,in the distributing system. Safety devices oper- atedeleUrically shall not,depend upon the closing of the circuit toshut off the ruain'.gas supply, .This reijuirement should not he construed as 'prohibiting. the use of elec- trical regulating devices, .provided-hl-he',Tetjtiired safety de- vices'are also installed.' Limiting.,controls and low-water'�shut-off intendeil to disconnect (hc appliance from the electric power.supply shall•bc connected intotile' appliance'supply cirfuit on. the supply-side of all other control circuits. „•' (5) An -approved gas pressure regulator of sufficient'. size -shall'' be installed it, piegas line leading to. the. appli�licc. (6)'11:vcry gas boiler a; furnace shall be connected .to a fltie: -ht the ease of conversion burners the section 0[}. the fiue:j»pe between the outlet of the appliance and the draft. bgad-'s1L111;be not -less than one square inch per •7,500' hohrlX B.T,;13. input. In no case shall this section be'7c5s„thml`:thrq'((ncbes in diameter, and it should not bed$rg4..than''thvq'hikt integral inch diameter above the size.tetNired by"this rule, 133 CITY GAS t7 IB APPLIANCES In the case of conversion burners, where the outlet from the appliance is larger than the above indicated size, defects shall be adequately repaired'before the installation an orifice plate may be inserted or a section of the flue is completed. pipe restricted to the size indicated; (d) BURNEns.' The, proportioned section at slid flue outlet of the ap. (1) Conversion burners shall consist of Taciory assem- pliance(eliminates the necessity. bf uiingau:adjustable bled and. tested units accompanied by ;cofnplete slid eom- damper'fir the flue pipe and no such: damper is permitted. prehensive installation and operation •instructtotis that Whctm c dampers are an integral part clic boiler or observe the foregoing and following feiltaes: "' -?- .oC furnace, they shall be removed or permanently secured (2) The equipment shall incorporate-AtcePlable';provi- sighs for adjustment, control, support and:attachment to in the open position, except such dampers the'function of titd; heating plant or to the foundation on.whuch -it rests. which is to alter the passage of flue gaics ,through the 1t shall be so installed (and attached) as. to'prevent IMst- appliance, which shall be locked .in a position that does not interfdre with the normal operation of,the burners. . - ing, sliding, .or dropping out of the intended xoh reet A draft hood of approved design:or its dpproved equiv- position. (3) Installation and assembly shall be such as _to,per- alent shall be placed in and made a part of the flue pipe mit ready accessibilitp,for inspection, repair, and replace - from an appliance, or in the appliance ilself,.which is de- ment of parts. '•� signed to (1) insure the rapid escape of tileproductsof (A) Each '.burnecshall be installed with a properly combustion in the event of no draft, back draft, or stop- designated manually Operated shut-off valve, in the main page beyond the draft hood; (2)' prevent.a back draft tion supply line to -the burner. This valve shall posf- from entering the appliance; and (3) neutralize the effect boned at a,poinC. readily accessible for use and inspection. p of stack action of the flue upon the operation of•the (5) Burners should be supplied by an independent gas appliance. ' line direct from the meter. (b) FLUEWAYS AND CHIMNEY. .,. , Note: See Section 1201 of the Building Code Recommended (1) The chimney flue and flue pipe shall be examined be. the .National Board of Fire Uede—il..a (1933 Edition) for further detaite. and reconditioned, if necessary, so that t1ley will freely' ` conduct the flue gas to the outer air. 516. Flue Connections Required. (2) Care shall be exercised to prevent the flue pipe (a) Domestic appliances with input rating in excess of from entering the chimney so far as to unduly restrict-. 50,000 B.T.U. per hour, except domestic gas ranges. the space between its end slid the opposite wall of the (b) Automatically controlled appliances with input rat - chimney_ ing in excess of 5,000 B.T.U. per hour, except automatic (c) ))Polls. instantaneous water, heaters of the single faucet type, 1 When the ash rt door is closed; it, is recommended () P where. the single faucet is attached to and made a part of the appliance. , that the other doors of the hcating appliance be hioged atthe top to swing freely or be othern;ise arranged .to (c) Automatically controlled appliances with input hulkss relieve pressure due to puffs or barf;fire caused by ile-:., rating less than 5,000 B.T.U. per hour, equipped 'an device to the escape of un - layed ignition.with . automatic prevent (2) All heating surfaces and flue ways of the plant burned gas at the main burner or burners. The term "automatically controlled appliance" used in Shall be gastight and shall be thoroughly cleaned of soot, e2[bon, and other foreign substances before the burner is paragraphs (b) and (e) refers to appliances to which the s�,tigrl: Where leaks are found in the walls of the gas supply is automatically turned on and off in accord- ante with the demand for heat, but does not include appli- ){ 6mbust%on chamher hcating surfaces, -.or flue ways, such ances equipped with devices or controls governing the t CITY GAS l9 - APPLIANCES supply of gas to the main burner or burners which cannot (e) Avotn BENDS. The vent pipe Wall ll. bc.S.o installed as to avoid sharp turns or other eonstivctiorial m autoatically reduce the gas supply below thirty per cent features which would create excessive resistanceto" of the input rating. the flow of the gaseous products.. (d) Each of several appliances, except domestic gas ranges, installed in the same room, which in the aggre- • (f,) PITCH. The vent piPe should lnauttain 'a; pitch or dsc from the appliance gate, have an input rating as great as 30 B.T.U. per hour to the flue. or chimney-., For long 'runs;tt �s desirable to mafnilen.a_pftch'or chimney., per cubic foot of room content. rise Fat least %winch to the; foot. (c) Water heaters installed in bath rooms; bed rooms, :(g) In entering the flue or, chimney the n y. t or any occupied room normally kept closed. .comtcclion .:,shall be above the,extreme bottom come c by (f) Space heaters in sleeping quarters for use of tran- g.l taster, \(cans shall be employed which wfll pre- vent stents. Such heaters should also be equipped. with an +y' stricc�hhe4ent pipe, irom entering so far as. to giiduly re - automatic pilot which will effect ignition- of the main burner, space between its end and the opposite wall,ot the flue, )No vent and which, unless it is in operation; will shut off the gas supply to the main burner. -_pipe from a gas appliance shall he i!Itore(luc,nnectedunless.Yucjt any. other fuel vent (g) All house heating steam and hot water boilers and pipe, smokc'PiPc, gas. aPPliance is equipped'' with an aulamatte tleufce warm air furnaces including floor furnaces. to- I prevent the escape of unbarned'.gas at the main. burner or,burners. 517. Flue Connection Details. A as a lfance � Pipe and a, smokg: Pipc'.from.an appliance bu. 1, t fuel may be:COJti cted ay bisrno-! (a) DRAFT HOOD. Every flue connected appliance ex- cept an incinerator, unless its construction Serves the into the same flue througillepa- i rate o id in if joined ,' y be eonnected,through a singhc open ` same purpose, shall be equipped with an. effective draft toglhejoi nnevj : Y fitting located'as close as practicable inrm If: hood which either (1) has been approved'as part of the appliance or (2) complies with nationally recognized two or� more openings a;e•prorided tote one be at different standards for draft hoods. The draft hood shall be at- (h) D t;rt1?FY!sfviould levels: co(b) 1o4W A', `1o; dampers shall be plac4in any *.Vtl tacked to the flue collar of the appliance or as near to the appliance as conditions in.a for flue ��e'n'the aPPliance and the'. draft Dam ern P ¢c`5voided-'between permit and position which it is designed to horizontal and p,d .head. the dr2 the chintncy',y::'.: •,'., and with referencd vertical planes, The droit hood shall be so -located that is .' .[t'11ood til \f Ai•a.ky4. :;The material used for the material shall be ial u e tbii 'Venflue the relief opening not obstructed by any part of the appliance or adjacent construction. . • .' such; afor vent p resist the c and condensale`articularly gases (b) FLUE CONNECTION EFFEcriv.. . Before makinga F ' where' the veli[, piPe is long the clln cndcdFltc will occur in;this pipe flue connection, the chimney or flue shall be examined rather .than in Y• flue, , to in that o mallyaconducttt is the products of combustionclear, the outer appliances es shallmortar 'vent pipes from gas burning be acid air.(c) rc g. 518• Flues and Vents Gas SIZE. Except as Provided in paragraph $15 (a -G) -(Ob Appliances, ' for conversion burners, the vent pipe or connection shall not be smaller than the size indicated by the vent collar • forced concrete or L tic!°nmeys of masonry• or rein - rcquiral (or: rslftokestacks. A flues of the appliance. Type are which may he eo i\crtcd nreadilvors; (2 all appliances hgmd to (d) LENGTH of VENT PIPE. The horizontal vent con- ill, Usexcepsolid or fuel; .(3) all boilers notion shall be as short as possible and therefore the appliance shall' be located as near the chimney or flue as and furnates Specific approval is it°')['the building the use of 4' is practicabld.. i vobutientntvd o(ifdw for Piping; (i) all .other appliances 134 0 34 APPENDIX 1 13- Piping, Valves and Fittings. (a) Material delivered to any job should be carefully inspected as soon as Possible.by the gas fitter ,ycharge Of the work, and any part of it which is defective or which has been repaired with cement, -lead, or other ma- terial, or by caulking, rusting, or any other methods, except by welding, should not be used. ved fro(m) iPipnstallation shlould nlot sbe again Bused until they have been thoroughly cleaned, inspected, and ascertained to be the equivalent of new material. ' 14. Cutting, Threadingd anJointing... ould be threaded ad all burrs or (other obstructions with should Abe, removed siroum the pipe. .0 -•. (b) Nominal ordinary iron pipe sizes,-, American Standard are understood fn these regulatiotwfor all pipes and threads where not otherwise spccifued:; • (c) The following table specifies the nundiei of threads to be cut and the length .[•section to be threaded for each size of Pipe, based on American Standard: . Table 2. Pipe Threads. Approximate Appro:imara Genslh of Number Si". of sTh2unded Portion of Threads (Inches) ) Onchc') to be Cut Y 9/16 10 _Y4 10 M M 10 1A I . :3.1. d 1rr% 3 1 fl'• 2 1 IL 2% 1% ': 12. 3 1% 12'4 4 1-9is 13'..'- (d) Pipe with threads stripped, chipped, or damaged or which has corroded threads should not be used, or if the weld opens during the operation of. cutting or threading, that portion of the pipe should not be used. (e) When an approved jointing compound is used, it should be applied sparingly and, only to the male thread of the joint CITY GAS z3 600. TURNING -GAS ON AND OFF, 6o1. When:Gas May Be Turned On. (a) \PETER OR LINE COCK To BE USEti, Only employees of the gas company shall be permitted to turn the gas on at a service. cock o or curb cock. orantoan cock hi h controls the, Supply gasoo gas fitter who is not in the c'nPloy Of the gas company shall not turn the gas oil except at the meter cock or a line cock unless special Permission is granted to him by the gas company. - (b) WHEN GAS FITTER SNALL-Nor TURN' GAS ON AT METER Cocn. A gas fitter shall not turn the gas on at any meter cock without specific perinission,from the gas company or the Proper administrative authority' if any of the following conditions prevail: . , 1 If plc piping, appliances, or meter supplied trough the cock are known to leak or to be defective. 2. If the piping .or appliances supplied are required to be inspected and have not been inspected as Prescribed by (See also Appendix; Sec Rules 408 to 411, inclusive. - tions 25 to 28.) -or 3. If the proper administrati as authorty. the Sas or off. companly has requested that the g. iunless the gas 4. If the meter: cocic is found shut off: fitter has himself shut pr vlentrknows that it Nvis le leakage, and the cause of off by the customer to P ired by the,ga5 fitter. If the the leakage has been repa gas is found turned•ofl for other capse.h m or for some reason to tile as fitterene sl secure Tcrmls- snot known on front the gas company. before nturing on tl)c'gaS. AS -ON AT (c) WilEs GAS Sa'I,TT r.s{uli not turil thHAI L NOT TURNe gas on at LINE COCK-. A.<.described if a line cock any line cock if anyb of revail.ndHoweveq cf. lie o 2 .r-3 in paragraph O p at, the request of the customer is found closed, he may precautions are again turn gas on at,such cocko vets, fe conditions are e , if proper taken to prevent leakage and if n thereby established. not (d) APPLIANCES NOT cock CNNrC ' c erscock llb unlessa turned on at either a line .tk APPLIANCES 519. Installation of Type B Vent Piping. (a) Type B vent piping shall be installed with a clear- ance to combustible material or construction whether plastered or unplastered, of not less than one inch, pro- vided that for vents of floor furnaces, nater heaters and space heaters such clearance shall be not.less than three inches for a distance of not less than three feet from the outlet of the draft hood, measured along the center line of the vent piping. (b)' Suitable -provision shall be made to prevent me- chanical•injury to type' II vent piping where it extends through walls, floors or roofs. 520. Installation of -Vent Piping Other Than Type B. (a) Gas appliaitc�e vent piping other that) approved type B vent. piping shall not pass through any attic or concealed space nor.through any combustible floor, and shall not pass through any combustible roof except as specified in sectiod 518 (d). Where passing, through com- bustible roofs. in.`accordance with section. 518 (d) they shall be guarded at, the point of passage as specified for passage through coinbustible walls or partitions -in para- graph (b) below; (b) Gas appliance vent piping other than approved, type B rent piping shall not pass through combustible walls or partitions unless they are guarded at the point of pass- age (1) by double metal ventilated, thimbles not less tlum six inches larger'-fuv diameter than the .pipe, or (2) by double metal thimbles not. less than four inches larger in diameter than the'pfpe with the annular space filled with mineral wool or other approved noncombustible insulat- ing material; or in lieu of such protection all combustible material in the wall'orpartition shall be cut away from the vent pipe a sufficient' distance to provide the clearance required from such vent pipe to combustible material— : • any material used to close up such opening shall be non- combustible. (c) Clearances from combustible material to gas appli. ance vent piping shall be such that continued operation of the appliance wilt not raise the temperature of sur- rounding combustible material or construction more than 90 degrees Fahrenheit above normal room temperature. Code NOTE:See Sections bys theONational Bordinclusive ire Underwriters (1943 Edition) for further details. o 24 ' ITURNING GAS ON AND OFF gas-burning.appliance is connected to. the piping system supplied. 602.' Procedure When Turning ,Gas' On. (a) GAS FIT,.: o;DoN 'gas fitter, when turning gas ..on, shall- personally, observe' the pre- cautions indicated;. no helper or othc•'r.'person •.Aa11 be directed or allowed ;to turn' gas on,unless his:•work is dgsely supervised b'y the gas fitter who shallbe,c. :per- sbually on the job at the time when the work, is'don.'' . (b) PRECAUTIONS TO "BE OBSERVED." The ,precautions indicated shall be taken every, time the gas is- turned An, even though the gas has been shut: off ronly, for-a.'fcly minules'and the same precautions have.':bceu taken'eftly a few minutes previously{ The two principat'precautions to avoid;Leakage-arc checks on each other, and carenot to be regarded'as alternatives. '(c) PRorromir 1VIIEN. GAS is TURNED 'O�.''i:[A, gas fitter shall lobscrve,the iollowing procedure,,when;gas is turned on at anji�nwter cock: I Befw. turniiig.gas- under •pressure mto any piping,'. the; person' fn •chargc'.shall assure himsclfv thin there arc. - no openings-fhomhhicfi 'gas.cdit escape.' 2. The. meter shall; next lie turned on 36td ltllc hanS on the test dial:(a'smiR dial"generally-above the -regular ing'through the ureter., to assist in oose.Mnglany move. anent of the, dial hand, it is customary to wet a small.piccuc of+paper and.pastc its;cdge direelly-ovcr lite cente4 OS the habd as soon as ¢hiegas is tur(ied on. -'•:13• If the test, band'shou•s any movement allti)cl.<, pilot ;,burners, etc., the the meter shail•bitexam- ilcd�to sec :that they: are turndd off and do )not leik. If thc'e are' found p ht. it will indicate that' iluere is a leak in the hoose tpipmg .Thr meter cock slial� then be turned ofI'until the nccessliy repairs have 'been made,. after which the above k5t9�shall•be repeated. 4. If careful observation of the test hand for sufficient length of time reveals no movement, the piping shall be purged and a sinall-burner turned on and lighted and the hand of the test dial again observed. If this dial hand now moves (as it should) it will show that the meter is i operating properly. If the test hand does not show a 134 CITY GAS 21 except approved appliances which produce flue gas tem-. peratures not in excess of 550° l?, at the outlet: of the draft hood when burning gas,at the manufacturer's input rating, i NOTE: See Sections 1101 and.1102 of the Jtaommu iled Build- ing Code of the National Board of Fire Uudcrwriters'foi furtbtr d tails. In determining whether to permit the u of type B vent piping for venting boilers and fs urnaces having ane gas tempera-. into within the limit above specified, enforcing authorities should gidr consideration to the possibility, of.r change to solid or If 'd dael, and to he p ,sibility o[ gctti11 a. standard chimney installed in case . such a change is made. wheie local conditions with cred unl'1to k Iy3Uor wherely are such arrangements St ngcnohet madhcr e sot[hat the o forcing authority that e notified of the .'a chie from gas to other fuel and so that the cghit.the for ming ancyy can then be nlormd;'it is suggested tyle 9 venae piping 'for anthority.may if ly permit the es f hype e, rem ptptag'far ♦a ting healing Lotlera and furnaces use flue gas temperatures witLin the limit above specified. (b) Chimneys or flues installed for use of gas appli- ances but which are not suitable for solid or liquid fuels, - must be plainly and .permanently labeled "This flue'is for the use of gas burning appliancos only.":,'The label shall be attached at a point near where the vent -pipe enters the chimney, or with type B:vent piping used in 'place of a chimney, at a point near where the Type .B vent piping enters a wall, floor or ceiling. .. . . (c) TYPE B: Approved vent piping of Itoncombustible, corrosion -resistant material of adequate strength and heat insulating value, and having bell and spigot- or other :acceptable joints. Type B vent piping shall be used only with approved gas applianceswhich are not required by paragraph (a) above to be'ven'tdd to type A •flues: Nore: For makes of listed 'iy e B •Ent pipinif -s ".Under. Titers Laboratories, Inc. List of Inspected Gas; Oil and Hixel• .laneo is Appliances, under the heading Gas Appliances., (d) Vent pipes of sheet .copper of not loss than 24 U. S. gage: or of galvanized iron of not ;;less, ihan 20 U. S. gage or of other approved corrosion-iesfstant ma - serial, may be used for runs directly from the space in which the appliance is located through a roof or exterior • wall to the outer air. Such vent pipes shall not pass .through any attic or concealed space nor through any floor or partition. Installation with reference to clear- ance from combustible material and :passage through wall or roof shall comply with the provisions of section 520. CITY GAS 23 600. TURNING GAS ON AND OFF. 601. When'Gas May Be Turned On. (a) METER OR LINE COCK To BE USED. ' Only employees of the gas company shall be permitted to turn the gas on at a service cock or curb cock, or at any cock which controls the supply of gas to more than one customer. -A gas fitter who is. not in the eniploy of the gas company shall not turn the gas on except at themeter cock or a line cock unless special permission is granted to him by the gas company. (b) WHEN GAS FITTER STIALL NOT TURN GAS ON AT METER Cocic. A gas fitter shall not turn the gas on at any meter cock without specific permission from the gas company or the proper administrative authority if any of the following conditions prevail: • . _ 1. If the piping, appliances, or meter supplied through the cock are known to leak or to be. defective. 2. If the piping yr appliances supplied are required to be inspected and have not been inspected as prescribed by Rules 408 to 411, inclusive. (See also -Appendix; Sec- tions 25 to 28.) 3. If the proper administrative authority. or the gas company bas requested that the gas be left turned off. 4. If the meter: cock is found shut off,:unless the gas fitter has himself shut it off or kncws that it was shut off by the customer to prevent leakage,and the cause :of the leakage has been repaired by the gas fitter. If the gas is found turnto.off for other cause;or for some reaso I not known to tile'gas fitter, then he shall secure -permis- sion from the gas company. before turning on tbogas. (c) \%'HEN GA.s FITTER'STcnu. NOT TURN GAS.ON AT LINE. Cock. A,gas fitter slall not turn the gas op.at any line cock if any of the, conditions described -in 1, 2 Or 3 in paragraph N' prevail. I3owever, if a line cock ti is found closed, he may at, the request of the customer again turn gas on at such cock, if proper precautions are t`t{t taken to prevent leakage and if no unsafe conditions are �Y>A thereby established. (d) APPLIANCES NOT CONNECTED. Gas shall not be turned on at either a line cock or meter cock unless a L2 APPLIANCES 519. Installation of Type B Vent Piping. (a) Type B vent piping shall be installed With a clear- , ante to combustible: material or construction whether pro- videdPlastered or that for vents ofdlldor furnaces, thanof not less one heaters inch, mt space heaters suchclearance shall be not .less than three inches for a distance of not less than three feet from the outlet of' the draft hood, measured along the center line of the vent piping. (b)' Suitable -Provision shall be made to prevent' me- chanical•injurytb type B vent piping where it extends through walls, floors or roofs. ' 520. Installation of•Vent Piping Other Than:Type B. (a) Gas aPPIWIce'-vent piping other than approved type B vent piping shall not pass through any attic or concealed space nor,through any combustible floor, and shall not passthrough any combustible :roof except as specified fn section 518 .(d). Where pas sing, through com- bustible roofs.'in`accordance with section. 518 (d) they shall be guarded at the point of passage as specified for passage through coiiibushble Halls or partitions' in para- graph (b) below (b) Gas appliance cent piping other than approved type B rent Piping shall not pass through Combustible walls or partitions unless they are guarded at the point of pass- age (1) by double metal -Ventilated thimbles not less than six inches larger .in diameter than the pipe, or (2) by , double metal thimbles tiot.5ess than four inches larger in diameterthanthe'PiPe with the annular space filled with mineral wool or other approved .noncombustible insulat- ing material; or in lieu. of such protection all combustible material in the wall'or"partition shall be cut away from the vent pipe a 'suRtcient`distance to provide the clearance required from such vent pipe to combustible material— • • arty material used to close UP such opening shall be non- ' combustible. (c) Clearances from combustible material to gas appli- ance vent piping shall be such that continued operation of the appliance will not raise the temperature of sur- rounding combustible material or construction more than 90 degrees Fahrenheit above normal room temperature. NOTE: See Sections 1201 to 1207 'inclusive of the Building Code Rewmmended by the National Board of Fire Underwriters (1993 Ediemn) for further details. TURNING GAS ON AND OFF gas-burning.appliance is'counected to the piping system supplied'. - 602:' Procedure When' 'Ihirning Gas' On. (a) GAS FITTER To •1J0 bRX HI]ISELp. A'gas fitter, when turning gas, on; -shall- p6sottally, observe the pre- - cautions indicated;'.:no helper or othor�person.•.sltall be directed or allowed; to turn' gas oil -finless hi51.wdrk is olgsely. supervised' by' the'•.gas fitter•,w•ho. shalV,Ik,.: •poy: sally on the job at the time when the work' is'dbae. (b) PRECAUTIONS TO "BE OBSERVED., The:P'Ticafifions indicated shall be taken every time the gas, is: turned .on. even 'though the gas has, been shut oUonly for ae'fe'ty minules•and the same. precautions have''been.-Wkom,IiAly a few minutes previously> The two printipal,;jireeaufi0tfs to, avoid ,leakage -are checks on each other,Bnd;are;uot to be regarded' as alternatives. (C) PROCEDIURE WHEN, GAS IS TURNED'8a5 fitter shall observe the igllotving procedurti"When,'•gas is turned on at any metercock: ':•errs..•{;;, 1 Before turning,gas under, pressure ntto any ptpmg thli; person -in `cliarge'.shrill'assure himself that there. are rz: no openings'from Whidt-gas. can escape. _ • 2. The, motor shaW next -lie turned o- and to, -lu-nd. JI on the test dial'small dial"gonerally above tlie..iegular dials) carofully watched, to ascertain that no, gas iii _pass- ing'througli the motor,. To assist, in obsetringzanymove- ment of the dial hand; it is custotiiary tow 't;a small Pieter." oixpaper and.paste its:edge directly over the'cetttgr; pS the hand as soon as the •gas is turned• on i3. If the test b nd`showsally movement a(L Cocks pilot burncrs,tetc.,supPlied through the meter shalhbe-exam- iiicd to sec that they,are turned off and. do",not7eak. Ii these are, found light, it will indicate that: tie i;e is a leak in llic hotiso;piping. _The' meter Coe - slial('dten be ;turned off' until the necessagy repairs have '.been made;;.. after which the above }eyts*shall-be repeated.' ' 4. If careful observation of the test hand for sufficient' length of time redeaIs no movement, the piping shall be purged and a small bairn& turned on and lighted and the hand of the test dial again observed. if this dial hand now moves (as it should) it will ahow that the meter is operating properly. If the test hand does not show a J.;55 CITY GAS =s TURNING GAS ON AND OFF 25 ,� movcmehf:or register the flow of gas though, the .y (b) CUSTOMER TO RE WARNED BEFORE GAS IS SHUT meter the'cbnll burner,. it is evidem,Utat the testlot OFF. Before gas is shun off from any line or piping, all ne tight• ness could .not'hav� :been performed -Properly . :Tile customers or their responsible representatives whose ser- gas shall hd;.tui;ncq. tijf, the meter changed, and AD tests � vice is affected shall (except in emergencies) be advised prescribed.hi thjs Sectkm repeatedthat tile gas is to be shut off and told to shut off all S. Before imvjtig the premises all 'air must 6e•blown appliance cocks. They shall be warned not to open any from piping and aPPliances and pll,:pilot burners• . of in• appliance cocks until again notified the service has been candescent,lamPs,, automatic appliances, orrestored. gas range Customers shall he particularly warned not to must sc lighted a pl ptopetly adjusted. When attempt to turn the gas on at the meter cock or line cock Purging Purging pipes supplying•aPpliances which have burners enclosed in'spaces which for mry cause has been closed by the gas fitter. whercin gas miy'collect, the air shall be blown, in so far a's. Possible, Jrptlu (e) PROCEDURE. Wlten, to permit gas fitting or appli- an opening outside of the enclosure, such as. the end of the manifold. ante work to be done, gas is to be turned off from any , 603. When Gis Shall Be-Shut'Off. .l Piping system, the following procedure shall be observed. A gas fitter shall turn the gas'o'ff from any appliance, except in case of an emergency which requires immediate shutting OF of supply. Pipe, or piping system, and, regardless of the wishes of the user thereof, shall leave the turned 1. Identify dre cock or meter throughwhich' the gas gas off until the cause for interrupting the supply has been is supplied by noting whether any tag or marls iddicates removed in any one of the following cases:' which Piping system or part thereof is supplied through 1. If ordered to, do so,¢y. the Proper administrative it. (If more than one piping system is supplitd'from a single if authority. service or only a part of a system is to be shut 2. It leakage o[ gas.is noted, which appearMo.:be ' off, great care shall be exercised to make sure that Elie sufficient to cause danger of .fire, explosion, asphyxia•: correct valve or cock is closed) tion. _ .. 3. If he finds an installation of some gas ap'pliantc 2. Light a burner connected to the line from. which it is desired to shut off the gas, such as do cause. a serious person or properly ,hazard because of incomplete combustion, fire, 3. Close the Code or valva of or of. air. in piping.4..' Vote that the gas has actually gone out. t 4. If there is any, condition which threatens inter :- f the :, burner and that no gas is flowing from the burnec;.then tion Of .t, gas supply'wlsick .may cause burner outage. or otherwise Prove dangerous. - : Sore: Thio - shutoff this burner. S." JI gas continues to flow through this burner:hither . i m %--ilious c nsider con and'- rtduirea though[.and judgment _on the pan, o6 the gas fitter. If in. da bht, the, "ono cock & valve has been closed or there, is a Ieik in e h -ti men the sax oil fgr'sole[y and consult the grope{ aemim tre[ivo authority' or. the gat company at once. the tock or valve. If the wrong has been closed,. f the wrontored for ' 604. Procedure When Turning Gas`.Off. _ ocock t line service shall system of piping only after observing all the requirements - (a) GAS I'ITTCR To UsE��b1ETER CocNs ONLv.:�Viren of Rule 603. ' necessary to turn the gas off, a gas fitter shall bse:the If the valve or cock Passes gas when it is meter cock, or a line cock "which affects only part�of'the Piping of a single cti3tomer.,' he shall -not turn the apparently closed, a cock or valve preceding it i❑ the supply line shall be closed and the defective gas Off at the service cock, or curb cock ,unless authoiizcd 'company cock or valve repaired. However, if the defective cock or to do so by the gas or int the evenf.ot an emergency. valve is the meter cock, then the gas fitter shall notify the gas company of the CITY GAS 27 23 defect; a gas fitter not in the employ of the gas company reason mumci ja[.' shall not attempt to repair the meter cock. Until the defective• in sjsted upon .the�nt ©ductionsofl cock or valve has been repaired, no opening shall be made in the Piping system except as is allowed an odoranave t in intnaturis•in- If in,the opiniop'of .local authorities the gas. 'gas requires by Rule 103 (b). - :an,'odorant in order to jndicaicular escape of gas or as a;means i of detecting leaks.. data on.: tbce subject resulting from APPENDIX. research�mprehensive and exPeriincpta carried 0. b investigation in . 1. General Precautions. coopet;ation with the American Ga Bureau of Mines available- in- die"I farm of a Bureau is.: 'entitled, It is suggested that when working on Pipes filled with "Waning of �Iin'ks'kssociation Agents for Pud°Cas—\[onographt4.n'.'_° -Nme:' The S.'F. P..A, gas, outlets larger Than -inch size and pressures in rc ,ort Odori.ation of Cas, a tic Nacm,ot Fin: Code. for Flammahle Linuids Preara tn.•1- �.� excess of 10 inches of water be not handled except by a :Planning: pip�n�,.... and Casea. specialist. In any event, the following Precautions shall be observed: with 1. Determine _'•Bci'tjreproceeding any whole installation should be carefully of gas Piping, the ,' • encu the location of the meter cock or line b • to the local gas su 1 Y Planned with refer-. likely supply -and the for .' cock whieil the gas supply to the proposed opening is > PP Y P P P g to be em uses which it is ployed Liberal; provision controlled and sec that it in working order' should be made : sen 2. Make sure that no fire or dame or spark -emitting oil+il+lug, the number of valves and outl lsntet�s for supply orangel device of any kind is near enough to set fire to the gas .in .the demand forrs able.0 in til togas used (in -feet to which may escape. per hour) "should be dThe etermined, 'ever. possible, .directly=front be 3,` Determine that even the slight escape of gas ex- the- manufacturer's B.T. idgs'of the applianeei'which u•}ll,actnglly'be the, heatmg,value peeled will not be injurious to persons, especially invalids or small children, tailed and of the gas to >{o ttsgd• Por the ratings of 4. Examine the threads to be used, to the use in case the:appliaitces to tic installed are not known Table 1 snow gi plias common make sure opening can be quickly and tightly dosed. gis as•a c aPproximatc input ratings of cs jti-p alcor cubic feet' Per hour and the 5:'• Have at hand a Plug of rubber or other suitable per ],our •bf Soo equir- figure is a fairlsafe one B.T.U.• gas. The latter ' for y • material to fit snugly mto the opening. natural gas, bottled a0 use when'hlsxalling -Piping likely to be or other sujjply 6. •?\fake sure that no lighted burners or pilot lights replaced by which is life Of the installation, y manufactured gas during supplied from the line to be opened are turned so Inv the that they may go out or flash back because of the sudden drop in pressure in the pipe when it is opened. After the work has been completed, all appliances '.'r f is?• - •• _ should be examined and any Pilot lights and burners which may, have been extinguished relighted or turned off. ODORr61VG' NATURAL GAS. Natural gases as a class, do not possess odor to a degree comparable with rnanu- - . �:; '•, • factured gas, and sonic are practically odorless. Por this a 5', s _a: 156 CITY- GAS 29 Tab Is l:. APgRpxixiATE INPUT RATiNes'oF Come ioii Cxi.% .. .. - APPLIANCES. - Input Rating' Thousands Cu. Ft. Per Hr. of B.T.U. <500 B.T.U. ;Applianee Per lie .r Gm) Dom-ic'-gas ranges (4 burner so k, ? 62.5 . 125 Domestic. gas ranges (6 burner:toF]_' with c- ven ..... :...::.... ... .. LOi:S ; 215 Domestic hat pla,es ....... ' or laundry. gto+--.! - - (per burner) .................... ._.>.._._ ... ss Domestic SN' lsting water braces..:..' 25-37:5, 50-75 Autio atic:aiorage w• atcr.beatertt:., 1. Slow tccovrry ....._.._._............. - 2.5-10 5-20 Quick recover e _ ._._........_..:..:._.. 15-70 30-1:0 Inamntaneaus ss r beaten per, cath at 2 gals.. Per minute of capacity:___ 75 150 ._ Gas boilers _.. ...............__...:_:­,;:_ 65-5;0,00 130-10,0o0 nn Gas steam d)am(per tion)._..._ 2 Domestic room heaters—Radiant hwter Per 'n le radiant __...._ 2 -.i"- Per double radiane ..._...........d��... a conversion burners .. _.... _.... 80-400 160-a00: Unit eratora ... _...._...._.__..A.__.__.... 50-900 103.8-7.0 RefrWarm air fl ....._.a .....___....._.......... 401.9509 7.aJ.S. Warm ,r !urns......, .15-80 so 1.160. Floor furnaces ""'"'_...,.._...._. .....�..:.-.........._.:_..__. 15-80 30-360,^ 3. Over. Size Outlets Recommended. In determining the size of outlet to allow, any antitir pated increase in the consumption of gas should be taken intoaccount. Even when the immediate installapon'of appliances floes not necessitate this, it is recomm6lded that the following be the minimum size outlet uscdln'the various locations: 1. FotiUkitchen range, 4d -inch- - 2. Near the hot water tank" for the Installation %f�V circulating water heater; %-inch('uBless the heater viii be i satisfactorily supplied from the Y4 -inch opening Icit"for the range. 3. Fors room or space 'heater, %-inch. 4. Foran instantaneous water heater, at least I iochi::. 4. Testing for Tightness. (a). Afk'P]RESSURE TEST. When piping is to be tested for tightness 'by the. application of air pressure, ap,--air pump and mercury -gauge should be used. The gauge should be adequate in length,:for the pressure fell de and be of such design that the' height of the coluuio-'9 CITY GAS 6. Leaks -and Emergency Repairs. In cases of leaks or emergency repairs, keep all sources of ignition away and notify the gas company and proper administrative authority as quickly as possible. 7..- Purging to Remove Air From Piping. Purging is dove by opening as many burners as neces. sary, one at a time, lighting the gas as soon as it comes to each,. until it is certain that no air remains in the piping, ..... . . If a large amount of air has probably entered the pipes, it is best to begin at, the burners most distant from the supply and work back to the meter; but if only a - small amouitt of air has probably entered, first open. the, one or two bunters next beyond the point where it hits entered, and then make. sure other parts of the system are free front air by tests at other burners. Eadi line should be separately tested; even though it is thought no air has entered it. ' Never purge through an open, outlet. If enough gas to smell escapes into any 'repro during purging this should be removed at once by properly ventilating the room.' When. trying burners some distance beyond the point where the'air has entered, let them burn long enough to be sure that no Pocket of air remains between the outlet tested and the supply., ' If it is. impracticable .forthe gas fitter to purge the: piping, the customer should be warned by the gas filter . to tike care to remove all air before leaving burners which have been lighted. 8t' General Inspection. ' When a general inspection required, all portions of the piping ins•GTllatto, should be closely examined by the proper adnunistrative authority to ensure that there is full compliance with this Cale as regards size, grading, outlets, materials used, and all other points which can be determined by examination. 9. Inspection, of New Piping. - (a) IF THE PIPING IS TO BE CONCEALED: (1) It should .be inspected as described in Appendix, Section 10.- . APPENDIX mercury can be measured with accuracy. The tube or tubes should be of uniform.size, with all passages full size and unobstructed. The'Pump and gauge should be so attached to the piping. that the gauge can be watched during the raising of ,the pressure. All line cocks or valves on the system tested should be open and all ob- structions removed from the pipes, so that pressure will be applied during the test up to all outicts. If the column of mert:ury does not fall by a sufficient amount to be detectable during the lest period, the Piping is satisfactory; but if the column of mercury falls by a sufficient amount to be detectable during the telt period, a leak is indicated. Norn: After the test described hove has Leen made, onor y outlets should he opened at the most distant points Hion thegauge, so that there' will be no chance for a stoppage to rt main nmuiced in the piping. (b) TESTING WITH GAS. Follow procedure of Rule 602. S. Searching for Leaks. (a) dIETHODS TO DE USED. If a piping system is Irak- frig, the react location of the leak should in every case .h be determined by the use of one or more of the follow- ing methods: If aWhas been used: 1. By listening for the hissing sound of escaping air.. 2. By passing the hand over and around the piping. 3. By applying a solution of soap and water to the exterior of the system. Leaks will be in by the appearance of bubbles of air, these continuing to form until the liquid dries. (This is the most sensitive and desirable procedure.) If gas has been used: 1. By. applying a solution of soap and water as de- scribed in the preceding paragraph. 2. By the sense of smell. (b) Ams Irr THE LOCATION of LEANS. In the event of -a.very small leak difficult of location, a small amount of . 'cthcr,yoilof peppermint or other readily volatile!- non- oorrosive,, liquid may be introduced into the, piping in oleder to assist in this work. 32 , APPENDIX (2) It should be tested by th6,broper administrative authority before the pipes are concealed.: A pressure of 3 times the expected service pressure;,,6uf-.'never less than . 3 pounds per sbg� quare inch (indicated 8:(> -inch column Of mcruvy) should be applied. The pressure should re- main on the system for a period of at least 10 minutes, the. mercury column showing no detectable drop. (3) It should be again tested by the proper adminis. trative authority after -all -work in the building which might disturb the Pipilig-Jias been completed, but.he[gre .appliances are attached.. ;Tile pressure to be• ipplicCand the duration of the test period should -be the same,is that required in, Section.2,V[. this paragraph. (h) IF THE PIPINO?IS:Tri DE.CONc£ALEO AND.. ITTACHEB To OLD PIPING.. - (1) It should be­h1fleeted as.described in. Appendix, Section 8. (2) It should bc'testcd by the proper .administrative ' authority before the "pipes are either concealed or attached to the old system.: '.Tec pressure to be applied and the duration- of the test period should be of the same as that specified in paragraph(a) 2, of this section. (3);After fulfilling; the requirements of the previous paragraphs;. it may -.13c attached to the old system; but the combfnsd system sliould be 'subjected to the test speci- fied in Appendix. Section 10. (c) IF THE Pie he IS To BE Exrosso. The piping should'be inspected by the gas fitter in the manner described in Appendix, Section 8, andtested as spcoified in paragraphia (2) of this section. 10. lhspeetion of Old Piping. ' (a) CONCEALED PIPING WITH.NO RECORD OF INSPEc-• TION.. If there is no record of ilispection of an old piping system, it should be tested preferably by the proper ad. ministrative authority or; the gas, company as described in:Atlpendix, Section 9 (a) (2), with the pressure and duration prescribed in Appendix, Section 9 (e) (2) before gas is turned in o it: .- •.. (b) AFTER Rernias,•r�_QFsnTIONS, OR ADDITIONS• The entirg, system should bet`.t""Vss d as described in Rule 602 pref6rethly by the proper administrative authority, or the Yf L,.-, .,CfTY GAS 33 gas company except in - minor changgi, which may be examined by the. gas ,fitteralonc. in., hance"::The Amor , 'o ing'worli. roar be classed under the tmm •, c (t).The em—ming of ."'dinnces o n •i 1 installed it a6 systems or, where the msrallmia, t en'o cd Piping to s f t such appliance does not asceed 5o feet . length. (2) The ren aril of appliances and, replacement by others for the sane similar service, or the removal of appliances and chpla.s'ofr-1cts. (I)"The femoral of appliances from one location ta.another whi tLe q. the Premises makt s small alterations iti'li ping rcgai" the installation of "m SO .feet'.( ex Posed pipins, . (9) TLcaking of e t gcncy repairs, or the peinuncnt repair of lea]: on eonepaled piping, or any leak. W. exposed piping orapPlhale,". (5) Theepair or di.stme.t .r Ppiance" or Pipfng, moral [ obstructions from piping, a nil the clearing of appl mr;,s ober, no leakage is . iv $•ed. 11.' Record of Inspections: A afetal strap or tag, suitably marked and showing the date of approval by the. -'proper adminislrativc;author- ity, . should be secured to each Piping system � near the outlet for the meter. I - In.addidon a certiftcafeof�approval should -be . issued to thy. gas fitter installing -the piping. \arc: The ' somite .(. this -icrtifemp not only i protects, the thetfa t that his work Pwas satilf ,tory, regardlesse of subsequent Installations. •. 12. Location of Meter. (a) House piping should not be run so as to necessi- tate the placing of a meter under steps, under -a show window,. -in an unventilated closet or other small confined space, in a coal bin, driveway, passage or other location where it will be subject to damage, or near a furnace or boiler, or other equipment which produces large heating effects.' The meter should, be located at a safe distance from any Probable source: of unguarded Flame or electric sparks,,and'where it ivill`not be subject to unusual cor- rosion.?-,8xtremely high or low temperatures and sudden changes of•'temperaturc should be avoided as much as possible.-, (b). METER SUPPORr. 'Meters should be adequately supported and connected to the piping so as not to e3rert: : undue strain on the connection.: CITY GAS as 15. Size of Pipe.. (a). A system 'of piping as a whole, and each of its branclfes,'should be designed to have a capacity, with a pressure of 0.3" inch, that is not less than the maximum probable demand through it. Table 3 is a table of the capacity ofpipe of different diameters and lengthsfor gas of Ob specific gravity (referred to air). To convert the figures in this table to any other gravity multiply: the value by 0.6/sp.gr. where sp.gr, represents the specific gravity of the gas to be used. By adopting a 0.3. inch pressure drop as standard enough allowance is made for the effect of an ordinary number of fittings. (b) No pipe smaller than standard 34 -inch size should be used in any concealed gas piping installations; and no pipe smaller than standard %-inch size should be used for concealed horizontal piping. (C) SIZE OF EXTENSIONS. Extensions to existing Pip- ing should conform .to Table 3 and should be converted where the proper size of pipe can be maintained. In no case should extensions be made from smaller pipe. Table 3. Showing Capacity of Pipc of Different Diameters and Lengths in Cubic Feet Per Hour with Pressure Drop of 0.3 inch aifd Specific Gravity 0.60. Lgth. of Pipc Dsnucraa or Ptre is lscnes - 15 76 172 345 750 1220 2480 6500 138W38700 79000 30 55 120 241 535 850 1780 4700 9700. '27370 55850 45 44 99 199 435 700 1475 3900 7900'23350 45600 60 38 86 173 380 610 1290 3450 6800. 19330 39500 75 77 155 345 545 1120 3000 6000 17310 35300 90 70 141 310 490 1000 2700 5500. 15600 32250 105 65 131 285 450 920 2450 5100 W20 29850 120 120 270 420 860 2300 4800' 13680 27920 150 "109 242 380 780 2090 4350.1?740 25000 180 '100 225 350 720 1950 4000 11160 22800 210 205 320 660 1780 3700 10330 21100 240 190 300 620 1680 3490 9600 ,19740- 270 178 285 580 1580 3250•.9000;1$610,:'x.," 300 170 270 545 1490 3001) 8500' t76G0:; A50 140 226 450 1230 2500'" 7000 ;14A?0 600 119 192 390 1030 2130' 6000, 12480, 137 APPENDIX 13. Piping, Valves and Fittings. (a) Material delivered to any job should be carefully inspected as soon as possible by the gas fitter ,in charge Of the work, and any part of it which is defective or which has been repaired w,,fill cement,- lead, or other nfa- terial, or by caulking, rusting, or any other methods, except by welding. should not be used. from)mytPinstallationcshould not be again useor d until they bare been thoroughly cleaned, inspected, and ascertained to be the equivalent of new material. 14. Cutting, Threading and Jointing. ( allburrrs or or Obstructionst should abc�ut.threads ad Cemovcd froom the pipe. (b) Nominal ordinary iron IaPe sizes and American Standard are understood in these rcgulati6)bs�rfall pipes and threads where not otherwise specified, ;- (c) The following table specifies the uumligr of threads to be cut and the length of'eeetion to he thriaded for each size of Pipe, based on American Standard:_ Table 2. Pipe Threads. Approximate -' r(Pr mbe ate Si of I' Ti L gth of reaJed Portion (Ipe nches)(In<h,") at Ti:r<arls 3S t. he Cat y 9/16 ]0 ]0 1Y 4a E .10 1% l' 10 T.i ;y a If '.• 2/ 4 I% 12 1y 13 ' which has corrodedthreadsthreadsosl should lnot be used or orgif the weld opens during the operation of, cutting or threading, that portion of the pipe should not be used. should ba When appl ed sparing sparinglyjointing and. only to the maleound is threit at!of the joint. 36 :APPENDIX „ 16. Accessibility of Piping, (a) Concealed Piping should be located- in hollow rather than in solid partitions and should be locatedso asto be free from contact with corrosive materials; 'un- less suitable means are provided for its protection, (b) UNDER TILE, ETc. Piping should not be laid in or under tile, mosaic, or co'floors if -it ran be avoided, but should be so placed as to be accessible with a minimum of damage to walls, ceilings, or floors: � :'Ab (c) PIPING Coxt` .EO UNDER FLOORING. ove th, basement, pipe should' not be run under beamir:6r floor joists where it will be covered wide plastering;'but should be run along the top of the beams or joists so that it will be accessible by removing one or aro boards from the floor. Where it is necessary to notch beams or joists, Piping should not be more than 24 inches from or supports below, the beam. the wall (d) Pipe should not be installed in chimneys, flues or in ventilating ducts apd shafts. 17. Piping in Concrete, Masonry, Etc. (a) PIPING Ell' EE((DED thr 'SrRUCLURAL \InTERywt:, \\'here necessary to ei{'S(fed a Pipe in direct contact LAIN neat cement or concrete; black iron pipe map be used;,yj When in' contact with material O r(jng a cormsiuG action, the Piping should be made u�}oT ipe and fittings - .4 on the outside and also coatiw•ith a suitable corrosion resisting material. (ki)n off NPipes should be tell iocmbcdded."Jlp required Pro - lugs of fire -resistive or other struetur,ift.+h1c nbcr in build- . esistive construction. 18. Passing Offsets in Walls. �'�'s• When the thickness of a call has been increased and it is necessary to offset a vertical Pipe, the .gffset should not be made around the projection by the use.of ri ht - .10c fittings, but should be made with 450' fitting order to reduce the likelihood of stoppage. When the point of offset is accessible, as iti' the case of a foundation wall, the upper fitting should be a 45° ell and the lower a 45° y -bend. The 'hbranclf. of the Y be Plugged. eoulbe vertical, and the lowr "run' opening should 138 n CITY. GAS.: 39 J8 APPENDIX CITY GAS 37 , (b) 'Nunlnen of Surroars. The following is the maxi - in con- When the offset is not accessible, or when there is a mush spacing of supports which should be used clnnge•-of direction necessitating a plugged tee with a tiuuouspiping installations:•' - •` 6 feet short. distance below the lower offset fitting, two 45e inch or % tach Pipe _..:....................., ... .. ;Jcet i- fittings should be used. inch or 1 inch Pipe ;—a-••••-..... "'"z' ". 19,' Piping Exposed to Changes in Temperature or to - IA inch or larger (Hdrizotital) ......•-- .;i10,'feet floorlevel Moisture. I% inch or larger ( Vertical)........every ••�,(a) Exrosuae. All pipes should be so placed as to the length of pipots sliortcr;than (bat'giyeii in a}•gild exposure to extreme heat, cold, or moisture in so ..When the, above table, it should be adcquatdy.. suPported,; 'far as is practicable. Supply lines and other piping should - �. Whenever there is a change of ;direction of 45'or more not.be located in Or on outside walls of vestibules; they ora branched fitting is used, support should be provide shall be. at;least 3 feet from the outside walls when prat- on. at least one side of, the bend or;fitting-prcfcfably "ticable - ., within 6 inches of this p6inl, nate s other. supports render (V) S1orrAceg.;; When piping must be so located that this unnecessary. . . ' . it may bcjedposcd't6 low temperatures, special care should This be done by cov- ," (c) FASTENING PIPE. Only such metal ,pipe: strays, be taken to•Prevcnt-stoppages. may cring.thc•liipe:-bg• use of larger size than otherwise neces- iron hooks, hook plates,.or hangers suitable toe' he size strength and qual- 'sary,'or;b3i 6her'approved means. of pipe to be secured, and.of standard ity, should be used for supporting piping. 7h.'tingdlic. \Vhen, piping is exposed through area- (c); P g :or:oilher locations, he should be in- Pipe straps iron hooks sinould•'not be used for fast- ways similar pipe creased,in size sufficiently to prevent stoppages due to .or ening pipe of -a size over 2 inches. ""Beyond this size, is to befastened to the freezing ;hy. tile, use of eccentric fittings which shall be The when the pipe'is horizontal and floor joists or beams, pipe hangers should be used; when seLto penult drainage of the enlarged section. en- larged stCtkui should extend through the •wall at each he pipe is horizontal and is to be fastened.to the wall, side of 'tints aFcaway. In the case of outside gas lamps, hoolc plates should be used. In lite case of a;vertical Pipe 2 inches in size, a, strap made of band iron fashioned the .pipe •slfoUl •be increased by an ordinary concentric it over on the job, or a standard -form of prepared.band strap enlarging•'fitffng'just inside of the point where passes securely fastened to the wall should be employed. through the wall:.• When the pipe is to extend through a window frame' (d) SECURING PIPE TO :WOOD WALLS, PARTITIONS, OR it should be,as large as practicable, and should be in- CEILING. When piping is ruiton }wood -walls, partitions, or ceilings, the supports should'be securely. screwed (not creased insiic-immediately outside he frame. nailed) to the woodwork at the intervals given in -(b). 20. Piping to -Overhanging Rooms. When the piping docs not run sufficiently close to the Where there are. overhanging kitchens or other rooms, woodwork to admit of its being fastened directly thereto, built beyond foundation wails, in which gas appliances woad strips spaced at the distances ;riven in (b) "Should are installed, car<. should be taken to avoid placing the be securely fastened to the woodwork as above described. piping supplyink these: appliances in the open where"'tit (e) SECURING PIPE To CONCREI•E, MASONRY, BRICK OR will be exposed do extreme 'changes of temperature. In TILE WALLS, PARTITIONS, OR CEILixcs. When piping is all such cases` the piping should be brought up inside run an masonry, concrete, brick or tile }walls, etc., it the building proper andrunaround the sides of the rooms should be rigidly fastened by hooks, metal straps, or pipe in the.most practical!maniner. hangers which are securely held to the avall partition or 21. Supporting Plpe �` ceiling by the use of suitable. expansion bolts or other (a) Piping.should Tid1.e be laid .to support' any -weight approved device, spaced at tiles distances given in (b). (except fixtures) or'bc subjected to any extra strain. n CITY. GAS.: 39 -"' If this method is not Practicable, by SOM metal strapr ps, by 40 APPENDIX or pipe hangersfastened SOME shall be firmly c bed masonry', -the or covered with other material equally effective'in pre - venting corrosion of the metal. Additional coats of blocks, masonry. ','�., or to wood strips securely IRS tened t6. to walls of chimneys paint should be aPPlicl'as often as necessary to prevent rusting, NOTE! (f): pipes should not be fastened Pipe should not be coated or painted until after the eat inspection. Of finCS. (b) PAINTING AND PROTECTING BEFORE AND AFTER 22. P'rotecton Against Strains. ENCLOSED BY CE]IENT, ETc. Piping is �' TEST. Piping should not be concealdd from view, painted, coated, or covered in any manner until -it has (a) fic,Where ol etc, or other strut dosed by or embedded in - it passed the inspection described in Appendix, Section 9 (a) (1) and forced, should so placed as tonal material, not reinforced, may be induced by settling or (2)•' to avoid he strains }vlticln — During the interval between the installation of the I cracking of the structure. PASSING TUROUGU WALLS,piping ing and its final closing in, particularly between the tests described in Appendix, Section 9 (a) (2) ALLS•i9,�aWhere (ll). nmade including the service 'Pipe, asses to uhdation wall) P and (3), the gas fitter shoDld 'take every precaution to properly pro - the gas and watertight through the oontile it should tett piping from injury, ' through concreLlt masonry, estin tilevvbottom of he g it. 26. Cocks and Valves. be encased, casing Pipe to Provide at least Y2 -inch clearance above be packed with mineral ' (a) SEPARATE SIIUT-OFF REQUIRED. Separate valves :The space above tine pipe should a incombustible material to afford a fire or cocks are :required on every supply line, or branch if the operation 'or . 'wool other :''stop, but care should be taken to avoid packing • above of the wall will pro- maintenance of the appliance supplied requires that gas be shut off from the line�or the pipe in such a way that settling "branch from lite to Umo, unless gas can be otherwise shut off ..'duce excessive strain. BASEMENT(c) BASEENT PffiNG. Pipe should not be run in when necessary with equal safety and convenience, .Such separate valves-or'cocks should be provided on branch ood coal bins or in other parts of a basement where w, is likely to be stored against It any or supply tine which is 2 inches or morein diameter, or which is rated."lo supply lumber or other material lar s run in stle iSupportedaon ithe more than 200 cubic feet of gas tiouri or which supplies an appliance . or to ectper ungfrom t to be bht ceiingeand tinot used for heating flammable ,materials or materials which give off combus- shall tible vapors or gases. walls 23. Branching. outlets arc.taken from horizontal P]Ping Nora: j't is Tecommended that ,p,,;.l ralres o rocks be ;n ,riled on ,y" pipe which supplies gas to s,x a more eparate of a similar nature, such Patin When ceiling the side of the piping branch should be V Less a c as presm8 it t the inlet u c of ceudw •ter• and in muhipIr burneriosiaat tiles the ,,,rare of whicb maraca mater at- direromction, 'and carried in a horizontal direction, preferably not �':, control adr;sable. The is of paragraph (a) are as ui ' than 6 inches., .� ;; •. ued not to be con- Oman stnced as recommending an additional shut-off on the toSTtltets. outlet should 1tc. run sup - ply pipe to asiiigle appliance i[ one is already installed. WhenPiping When practicable piping to each than as a drop. fn each installation special consideration should be given to the location for the shut as a riser rather w i, or Covering• 25. Painting a bI -orf. The desired end is the placing of a master shut-o(f at every Point where safety and convenience of operation -r4• (a) piping exposed on the outside of titer injiT4 be carefully cleaned atter miStilla-- and maintenance demand, (b) LOCATION of LINE Coctcs. damp location should with two coats of a pure red Ic?d'p�fpt Cocks or valves re_ untied should be placed neat enough non and painted to the a controlled and in such locatfdn as to be readily accessible CITY GAS at all times, and the handle of the cock or valve shall be easy to reach and to operate. When a cock is placed on an independent supply lin, to cut off gas from that line, no branch should be taken from this supply line between the meter and the cock, This precaution ensures that the line cock will control the gas to the whole line. If a branch is taken off be- tween the meter and the lock, this new branch should be controlled by a separate. shut-off, On circulating systems "of piping care should be taken to provide cocks to cut off the supply from both direc- tions whenever this may be necessary, ' (c) In buildings supplied by a master meter or where meters are not readily accessible from the appliance loca- tion, an individual control valva should be provided at the appliance ahead of the union connection. 27. Prohibited Fittings. (a) Connections on concealed piping should be made by the use of ground joint unions and the nut should be Punched to prevent loosening by vibration. ''.(b) When connecting two sizes of pipe, a reducing fit- ting is recommended (c) Bushings and swing joints made by combinit Ions of fittings should not be used on concealed piping: Norcr This recommendation is Intended to discourage the us No— of combination of fittings for cefi a ienee in connecting up piping. This --say can be a .ided b, cutting aec rale,))• to Icngdt d ref 1 thread,+s, which is o tial to goad Uen 1,`hip, The use of fittings for necessary offsets is not forbidden.' - 2g. Size of Outlets. (a) Aflxibrum SIZE. Wlien an outlet is Placed on a supply pipe before it is known what size of pipe will be connected 'to it, the outlet should be of the same size as the line which supplies it, or, if other lines are also sup- plied through .the same fitting, at least as large as the smallest of the other lilies supplied. (b) SIZE of OUTLETS FOR PUBLIC BUILDINGS AND DISPLAY WINDOWS. Ceiling outlets in churches, stores, theatres, or other places of assembly, or in rooms where ceilings are 20 feet in height or over, or in display or slio*,Ivindows, should not be less than %-inch. CITY GAS <d ween the jpists;or studs, in order to prevent the fixture from swinging 4d straining the joint. 33. Adjustrtier3�'�aritl'Purgfng of Appliances. Every appWi:c should be properly adjusted aftep;•be- ing installed,.3hd the customer should be instructed' ',',:to - its safe operation. When purging an appliance hading burners enclosed in a space wherein gas may collect, the air s)tould be drawn, in so far as Possible, from an open - .119 outside the enclosure, such as the end of the manifold, 34. .;Gas to :be Turned On Each Night. 1_!'vas fitter when working on a -piping system which supplies gas for domestic purposes or for lighting should,' if possjble, arrange his work so Uiat .the gas service can be restored each evening when he leaves work. -When- evcrgas is thus turned on for temporary use at night, every precaution indicated in Ru1ej605 shall be observed. 35. Notice to Gas Company and Proper Administra- tive Authority. , (a) .NOTICE To GAS COMPANY'OR PROPER ADIIINISTRA- TIwE AUTHORITY IF GAS CANNOT'DE TURNED ON. ').f for Dreason a gas fitter cannot turn the gas on •ryhen he l'as completed his work on any piping system, or is for- bidden by these rules to do so, he should at;once notify the gas company, and, when necessary, the hipper admin- istrative authority, of the conditions which?prevent him from turning gas on. (Sec paragraph [b].)'- (b) NOTICE OF SHUT-OFF 70 PROPER A*rINISTRATIVE AUTHORITY AND To GAS COMPANY. In ctise•a gas fitter shuts the gas off under the provisions of:;;;tule 603, he should immediately notify the gas company and the 'proper administrative authority of the character and the cause of the action taken in order that they may not inadvertently restore service without'-c'J]{fination of the hazards noted. 36. Recommended Regulations for "Oi Installation of Gas Mixing Systems. Apparatus intended for use in preniixxing air and manu- factured or natural gases in quantities sufficient to meet Uie demands of industrial establishments or needs of small municipalities, and delivering the mixture under. pressure into pipe lines for use in gas-fired appliances shall can. form to the following minimum requirements: 139 APPENDIX 22 Location of Outlets.;" - (a) Outlets. for, gas appliances such as ranges or space d heaters, Could•pot-be less. than thrceAnchcs above the floor anhvolidches in the clear from:the baseboard, (b) OnjEcrioxABLE LOCATIONS FOR OUTLETS. Outlets should not be Placed back of swinging doors or close to the window or door frames, or any other place where good practice forbids. 30. Ceiling and Wall -Bracket Outlets. (a) Outlets' on. concealed piping should project beyond the finished wall-br, ceiling: (or in a suitable recess in the case of recessed fittings) so that all of the threads ree- onjmended by Appendix 15 (c) are clear and available for,&e and there )s, sufficient wrench space on the un- thrcilQ portion of the, pipe; 'and the pipe should he run far,;enough front floor -and walls to permit the use of a suitable size wrench without straining or bending the pipe.', Wliell the type- of,appliance to be secured to the: drop re4ilkds a longer projection than -stated above, this -fact should}be shown on the plans and allpwance be_piade far such, cquipmcnt l at -ihe tittle" of Elie. )nstillation; of''; the piping. Where.combinaiion fixtures or recessed baseboaiii�•fif- ,ings are used, tile. threads' oo� the piping:should be. -O of. the bark plate of the outle;_box. '.. •. '(b) b" LET FlTrrncs. Outlets on: 140 CITY GAS M (h) Piping employed in the installation of the equip- ment shall consist of full -weight wrought iron or stet Pipe. Pipe unions, where used, should preferably be of approved metal -to -metal seat type, obviating the use of gaskets. (1) Electrical motors employed in driving gas pumps or compressors should consist of totally -enclosed types or of the open induction type having no brushes, make -and - break contacts, collectors, or. vther arcing or sparking - parts. (j) Artificial lighting shall be restricted to electricity, employing incandescent electric lights. (k) Spark -emitting control appliances for power and light circuits should not be located in the immediate vicin- ity of the mixing equipment. Such electrical devices should preferably be located in an adjoining section to avoid ignition, by their operation, of escaping gas in case of injury to or failure of, parts. 4 A D 7 SECTION 37. The provisions of the Standards of the National Doard of i"ire 6 k Underwriters for the installation, Maintenance and Use of Piping, Appliances and ri t- ings for City Gas shall ce administered and enforced by the Chief of the Fire / Z &4-V— LGL Department, by and through subordinates appointed by him, and the Chief of the 5,7 Fire Department, or the members of the department charged with the responsibility 5 -27-s v of administering and enforcing said standards by _the direction of the Chief of the Fire Department shall, upontheir inspection and apLm oval of a gas appliance, accessory or piping system in accordance with the provisions of said standards, issue a permit to the applicant therefor upon the payment of the following fees: _I (1) (1) For the inspection of each gas appliance, accessory or -piping system, the fee shall be ,'1.00. (2) For each re -inspection of each gas appliance, accessory or piping system where it is found at the time of the previous inspection 'that the installation has not been made in accordance with said minimum requirements, the fee stall be 50�. Q 3 SECTTO'N 38. All fees received by the members of the rise Department shall be R paid into and become a part of the 10lice and kirements Pension fund of the City 3DpI�_ XS'- V?SS Z of Paducah. /7-9-17r fo d 0 141 SECTION 39 It shall be unlawful for any person, firm, company or asset iation to turn on, reconnect, or use gas service in or on any premises in the City of y 3 Paducah by the use of any appliance, accessory or piping system having; a capacity .� /3 w of as much as 5000 E.T.U. per hour, with the exception of --as ranges, without fir obtaining a permit for each such appliance, accessory or gas pining installed for use. SECTIOA 40. Any person, firm, company, corporation or association violating any of the provisions of this ordinance or failing to comply with any of the pro- visions of the standards of the National oard of !lire Underwriters for the Instal- lation, Eaintenance and Use of Piping, Appliances and v'ittings for City Gas referre� to in Section 1 hereof, shall be fined not less than Ten (,;10.00) Dollars, nor more than One Hundred (:,100.00) Dollars for each violation thereof, and each time or each day this ordinance or the requirements and provisions hereof are violated shall constitute a separate offense. SEC TIOW 41. If any section of this ordinance shall be adjudged or held invalid for any cause, it shall not thereby= cause or result in the voidin;; or invalidating of any other section of this ordinance. It is hereby declared as the legislative intent that this ordinance i:would have been adopted had such void or invalid pro- vision not been included therein. SECTION 42. This ordinance is supplemental to all other ordinances in effect in the City of Paducah, but to the extent of any conflict between it and any other ordinance, such other ordinance or ordinances are to the extent of such conflict hereby repealed. SECTIOW 43. This ordinance shall be in full force and effect from and after its adoption. Passed by the`oard of Commissioners September 12, 1950 Recorded by Sarah 'Thurman, City Clerk, September 12, 1950.