इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 6901 (2009): Gas welding equipment - Pressure regulators for gas cylinders used in welding, cutting and allied processes up to 300 bar [MTD 11: Welding General] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 6901 : 2009 ISO 2503 : 1998 Jf!7-;:rTzr IfFPJ:~ 1m- ~~JI 0q;P-h~ - ~frriJI, ~ -,jffi f{qrr~ m~~I~ ;j; ~ ~ 300 qn (1Cf) ct lffi fffP;is{j- cF fW: Gfq ~ ~ J ( rwr TfRTr',J:{UT .) Indian Standard GAS WELDING EQUIPMENT - PRESSURE REGULATORS FOR GAS CYLINDERS USED IN WELDING, CUTTING AND ALLIED PROCESSES UP TO 300 BAR ( Second Revision) ICS 77 160 'C:BIS 2009 BUREAU OF INDIAN STANDARDS MANAK BHA'!A~~ q BAHADUq SHAH ZAF'l.r\ MArie April 2009 P;iceGroup8 Welding GeneralSecuonatCommittee.MTD 11 NATIONALFOREWORD This IndianStandard (SecondReVISiOn)whichIS identicalwith ISO 2503 :1998 'Gasweldmg equipment Pressureregulators for gascylinders used inwelding,cutting and alliedprocesses up to 300bar' Issuedby theInternationalOrganization forStandardization (ISO)was adoptedby the Bureau of IndianStandardson therecommendationoftheWelding GeneralSectionalCommitteeandapprovaloftheMetallurgicalEngineering DivisionCounctl. This standard was onqrnalty published in 1973 and subsequently revised in 1981. This revision of the standardhas been taken up toalign itwith ISO2503 :1998by adoption,underdualnumbering system. This standardcovers all the important aspectsofpressure regulators for gas cylinders including the safety aspects.Certain aspects of physical characteristics that is pressure, flow rate and equipment classes for differenttypes of industrial gases used are specified very clearly. The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are,however.not identicalto those used in Indian Standards.Attention is particularlydrawn tothe following: a) Whereverthewords'InternationalStandard'appearreferring tothis standard,theyshouldbe read as 'IndianStandard'. b) Comma (,)has been used asadecimal marker, while in Indian Standards,the currentpracticeisto use apoint (.)as the decimal marker. SIS Certmcation Marking clause is given InNational Annex A, Inthisadopted standard,reference appears tocertain International Standards for which Indian Standards also exist.The correspondmg Indian Standards which are to be substituted intheir places are listed below along Withtheirdegreeof equivalence fortheeditions indicated: tntemeuooetStandard CorrespondingIndianStandard DegreeofEquivalence ISO554•,976Standardatmospheres IS 196 :1966 Atmospheric conditions Technically Equivalent for conditioning and/or testrng fortesting (revised) Spec.trcanons ISO 3253 1998 Gas welding IS6016 :2008Gas weldingequipment Identical eqUIpment - Hose connections for - Hoseconnections forequipmentfor equipment for welding cutting and welding, cutting and allied processes alliedprocesses (secondreVISIon) ISO 5171 1995 Pressure gauges IS 3624 : 1987 Specification for Technically Equivalent usedInwelding,Culling and allied pressureand vacuumgauges(second processes reVision) Thetechnicalcommitteeresponsibleforthepreparation of this standard has reviewedthe provisions ofthe follOWingInternationalStandards and has decided that they are acceptable for use inconjunction with this standard. (Continuedonthirdcover) IS U01 : 200t ISO 2S03 :1t98 Indian Standard GAS WELDING EQUIPMENT - PRESSURE REGULATORS FOR GAS CYLINDERS USED IN WELDING, CUTIING AND ALLIED PROCESSES UPTO 300 BAR ( Second Revision) 1 Scope This International Standard specuies requirements for smqle or two-stage pressure regulators lor connections 10 gas cylinders normally used for compressed gases up to 300 bar" (30 MPa). for dissolved acetylene. for liQuelled petroleum gases (LPG). methylacetylene-propadiene-mlxtures (MPS) and carbon droxide (CO) used In welding. cunmg and allied processes. 2 Normative references The tonowinq standards contain orovisions which. through relerence In trus text, constitute provrsions of trus International Standard At the time of publication.the editions indicated were valid All Standards are suorect to revision. and parties to agreements based on this lnternanonal Standard are encouraged to mvesnqate the POSSibIlity 01applying the most recent editions of the standards Indicated below Members 01 IEC and ISO mamtam registers of currently valid lnternanonal Standards. ISO 554 1976.Standardatmospheresforcondltiomngand/ortesting - Speof,catlOns ISO 3253 1998.Gas weldmgequiomeot- Hoseconnectionsforequipmentforweldmg.cutttngandrelatedprocesses ISO 5171.1995.Pressuregaugesusedtnweldmg.cutttngandafliedprocesses ISOlTR7470 1988.Valveoutlets forgas cynnders- Lrstofprovisions which are eitherstsrosraiseaormuse ISO 9090 1989.Gas tightnessofequiomen:forgas weldmgandalliedprocesses ISO95391988.Materials foreouomentusedmgas weldmg.cutttngandetueaprocesses 3 Definition Forthepurposesof thrsInternahonalStandard.the followmg definitIOnapplies 3.1 pressure regulator: Del/Ice lor regulatmg a generally variable Inlet pressure to an as constant as POSSIble outlet pressure. 1i 300bar relates10 ma.,murncylindercharg,ngpressure a t 15"C 1 IS 6901 :2009 ISO 2503: 1998 4 Terminology . en in the key to figure 1 given in table 1. The diagram of the pressure The terms relating to pressure regulators are glv regulatorisanexampleonly. 7 6 lor-----19 20 21 26 25 24 23 22 NOTES 1 Parts t2.13and 14arecomponentsofthe reliefvalve 2 Part 27ISanouUetvalve andItsinstallationisoptional.see 6.2.4. 3 Parts4a and4bofthe draWIngareexamplesandarenot specified.Othertypes of inletconnectionpiecesare alsoin use. figure1- Diegrwnof• pressureregulatoranddesignationofits components 2 IS 6901 : 2009 ISO 2503 :1998 Table 1- list of terms r-' , --_._----_.._-_.-.-..._,".._....----"....._.- T '- - --._.-.-_........._--...'- .~-..... ......j, . ....-..-~-.-. ---_..~-......._...- No. English I French _~n ---.--'-"---·--·--1- ··----------.. ---.-. . -- .._-- --.---.-.,._.----- _....-,._-------.-._-- _.•--- --_.-- --- 1 pre-s-s_u._re_._..a•-Jl-u_.s_t.,.n.._9.._s..,_c.•..r.-_--e-_...w_-..-._.-..........•-._.".+,i-_..V_I_•S_.-,1-t;>-.r_e._g-l--.!-'•.]--t'--....-_......• .......-._..----_.._.E._.•_.H..)..s_.t_.-.-.II-s-c-h--l.-,i....u•_!.).f-;._'-'--~-----_.----_.. ~2--ri-s-pnn-gpl'a-'t-e --"'- ····-·····GI p·.l.a··t..e...-a-u--d.t.'..r.."....-..r--n-tH.-a.n..-,-.-- _.._,...._....- _.Fede..--rte.-l,l,-e-r--- -._....,----_.__._-_..•~_..-._-_..~.._. 3 I body ------ - ---..•- _. ......__.---.-!--co-rp_s..•_._-•... ".-- .~--_.-_. ... -_._.."--~._- -K-o~.-r-p_.e._._r_....__.".--•...'----'-,.. ..•.._-~..•_--._.,._,. 4a Inlet stem raccord d"entl,·,' EIngangsstullen - -- ... 4b Inletnut ecrou ttott.int Scnraubvertnnounq _.--._ -- ---- --_._---+r-a-c-co-ro d---e-n--tr..e..e....--_._.._---- ,-,---_..'.._..._._~....----._--_._._-_.._.-_-----_.-_-, 5 ,nlet!liter I""rec'entree E'f:tril1sl,!te! --- --- _._-- ---- -._-- .. -... 6 seating washer JOintde rnanornetre Manometeranschluf3· I I DlchtungSling i I 7 high·pressuregauge manometre hautepression Hocndruckrnanometer I (amant) 8 pressureregulator valve cap boucnon de ctapet Regelvent,'kappe 9 pressureregulatorvalve spnnq ressort de ctapet Regelvent"teder ----_._-.'- -- - -_._._----_ _--,,---_. .._._-._._-'~_._--_.. 10 spnngcentre appui moosede centrage du Regelventll-Federtetler ressortde ciapet -- - ---._---- ----- 11 pressureregulator valve clapet Re_g_elvent" . .--------- - - - 12 reliefvalvecap VIS de reglage de1.1 soupape EII1steilschr.lubedes -_.._..-._--_.__..- --de-se-c-u--n-te- - _...-.-_...._---...._--- ...A._b~b-_l.a__.s_e.•._v-e-n-l_l._i_s...__._._-_.._.~._.._.._._------- 13 reliefvalve sprong ressort de soupapede secunte Feuerlur Abblaseven!ll _ - --------- --- -_.. 14 reliefvalve seat clapet de soupapede secunte Aoorasevenursuz 15 low-pressuregauge rnanornetre basse pression Nlederdruckmanometer (aval) _._ - --.._- -- - - 16 pressureregulator valveseat sll~ge RegelventrlSltl 17 pressureregulator valvepm pousso« Reqelventlls!lf1 - --- ------ -- -----.--_._--- 18 diaphragm plate plateau d'apPUidu POUSSOIf Membranteller .__.__.-+I -.._----- - --_.._ - --_...._._ _.- ._ - --------._ - - _._- -- 19 diaphraqm Imembrane Membran -- - - .----_._------- - ----- -- 20 outletconnection piece raccordde SOr1,e Abgangsstutzen (mamelon fllete) 21 union nut ecroude doudte Uberwurtrnutter 22 hosetail douuleporte-tuvau Scntaucntuue 23 diaphragm seal joint de membrane Membrangleilnng 24 pressure regulatorspnng ressortde detente SteHfeder 25 pressure regulatorcover couvsrcte Federdecket 26 pressure regulatorspnng plate apPUImoosedecentragedu Stellfeder1eller ressortde detente 27 outletvalve rob-netdesortie Absperl"\lentll 3 IS 6901 :2009 ISO 2503 :1998 5 Units 5.1 Pressure Thepressuresmeasuredare gaugepressures" and areexpressedin bar. 5.2 Flow Flow rates aremeasured In cubi.c metres per hour (m'lh) atnormal conditions" taking into accountthe relevant conversion coemcrentfor the gas used(see table 2). Table 2- Conversioncoefficient, U Conversioncoefficient Test gas air oxygen nitrogen argon hydro- helium acety- LPG, CO, gen lene e.g. propane , air 0,950 ,1,02 0,851 3,81 2.695 1,05 0.800 0.808 mtroqen 0.983 0.930 0,837 3,75 2.65 1,03 0.784 0.792 Conversioncoefficient,U,isbasedon the formula: rr; u = fr-; Yo 1$thespeCIficweightoftestgas; y, 1$the specificweightofgasused. 5.3 Tem.-ature TemperaturesaremeasuredIndegreesCelsius. 6 Manufacturingrequirements 6.1 ..~ MaterialsfofpressureregulatorsshaJIconfonntotherequirementsof ISO 9539. 6.2 Design,IMChtningandassembty 1.2.1 Oxygenregulators Regulatorsforoxygen shallbe designed,machined andmanufacturedsuchthat internalignitiondoesnot occur(see11.5.3). AIcomponentsandaccessoriesshallbe ltloroughlycleanedanddegreasedbeforeassembly. 2) Pressure811CeedIngatmosphencpressure. 3} NormalConditIOnsaregtYen10ISO554. .. 1_ IS "1: 2008 ISO 2503: 6.2.2 Acetylene regulators Regulatorsfor acetyleneshallbe desiqnedandmanufacturedso thattheoutletpressureshan notexceed 1.5bar 6.2.3 Filter A dust!tIter,havlOg an eHectlvecross-section compatible Withthe discharge.shall be mounted Wlthtn thepressure regulator upstream of the pressure regulator valve The filler shall not be removable WIthout the use of a tool The fitter shall retain particlesgreaterthan orequalto 0.1mm 6.2.4 Outletvalve Pressure regulatorscanbe !tttedWithan outlet valve Whenfitted.the spindle shallbe captive. 6.2.5 Pressureadjustingdevice This device shall be designed 10 such a way that It IS not possible for the pressure regulator valve to be held ,n the open POSition,for example as aconsequence of the spnng beingcompressed fully (toitssolidlength} If the o.mens.ons of the pressure adjusting screw are such as to prevent the spnnq becoming fully compressed then the pressureadjusting screw shall be not removable USing the adjusnnqdevice.II shallnotbe prJss,ble to setapressureatwhich the rehef valve vents 6.2.6 Reliefvalve 6.2.6.1 General The ',"lI1g of a rehef valve IS obligatory lnr all cornpfl!:,sed gases and carbon diOXide and optional for l.PG MPS and acetylene The minimum dl~char(/e 0 .. 01the relief valve.,f fitted. shall be equal to or greater than the standard rj,:ir;har9" 0 (see tables 3and 4)lor apressure P.. detmed by the expression PP. " 2p,.except in the case 01acetylene requlalors.where P" shallbeequalto 3bar forall classes W,lh decreasmqpressuretherehel valve stlallcloseillapressure q'ealer than p The r(-hel valve sllallIi,!no/\ ,l<liU"lablf! fly the user 6.2.6.2 Reliefvalvefor compressed gasesandcarbon dioxide The relief valve shall rernam gas Ilgh! to a pressure above Ihe maximum outletpressure achie\l(~d when Ihf! flow I'; stltJtoff for tne initial pressure P, Therehef valve sll;11Ib'!!1l1eli .,1 such ;t WilYItl;'!the qasC1lSctliu9W' ,.dlely 6.2.6.3 Reliefvalvefor acetylene The rehel valve.IIntted,shall remain gas lIgh!II)a pressure above 1.5bar Itshallbe fmed m ~;uch a waythat the gas 's not discharged towardsto theoperator 6.2.6.4 Reliefvalvefor LPGandMPS The relief valve.IIf'lted.shall conlorm to 6 2 6 2 5