ANSI B109 4 Main Doc 4 2 13 2 14PM Final Markup for Review August 2013

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

ANSIB109.4

AmericanNational Standard

Approved:December 2016

SELF-OPERATED DIAPHRAGM-TYPE NATURAL GAS SERVICE REGULATORS

ForNominalPipeSize 1¼inches(32mm)andsmaller withoutlet pressuresof2psi(13.8kPa)andless.

Secretariat

OperatingSection

400 N. Capitol St., NW

Washington, DC 20001

U.S.A.

CatalogNo.XM1602

2016

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

AMERICAN GAS ASSOCIATION (AGA)

NOTICE AND DISCLAIMER

This document was developed through a voluntary consensus standards development process via the American National Standards Institute (ANSI) ANSI Essential Requirements Due process requirement for American National Standards (Edition January 2014). While AGA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in this publication.

The AGA disclaims liability for any personal injury, property or other damages of any nature whatsoever, whether special, indirect, consequential or compensatory, directly or indirectly resulting from this publication, use of, or reliance on this publication. The AGA also makes no guaranty or warranty as to the accuracy or completeness of any information published herein.

In issuing and making this document available, the AGA is not undertaking to render professional or other services for or on behalf of any person or entity. Nor is the AGA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances.

The AGA has no power, nor does it undertake, to police or enforce compliance with the contents of this document. Nor does the AGA list, certify, test, or inspect products, designs, or installations for compliance with this document. Any certification or other statement of compliance with the requirements of this document shall not be attributable to the AGA and is solely the responsibility of the certifier or maker of the statement.

The AGA does not take any position with respect to the validity of any patent rights asserted in connection with any items which are mentioned in or are the subject of this publication, and the AGA disclaims liability for the infringement of any patent resulting from the use of or reliance on it. Users of this publication are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.

Users of this publication should consult applicable federal, state, and local laws and regulations. The AGA does not, through this publication, provide legal advice for any purpose or intend to urge action that is not in compliance with applicable laws, and this publication may not be construed as doing so.

Changes to this document may become necessary from time to time. If changes are believed appropriate by any person or entity, such suggested changes should be communicated to AGA in writing using the form found at the end of the document titled, Form For Proposals on ANSI B109.4 and sent to: American Gas Association, ATTN: Secretariat B109, 400 North Capitol Street, NW, Suite 450, Washington, DC 20001, U.S.A. Suggested changes must include: contact information, including name, address and any corporate affiliation; full name of the document; suggested revisions to the text of the document; the rationale for the suggested revisions; and permission to use the suggested revisions in an amended publication of the document.

Copyright©2015AmericanGasAssociation,All RightsReserved.

Permission isgrantedtorepublishmaterialhereininlawsorordinances,andinregulations, administrativeorders,orsimilardocumentsissuedbypublicauthorities. Thosedesiringpermission for otherpublicationshouldconsulttheAmericanGasAssociation, ATTN: ANSI B109.4 Secretariat, 400 N. Capitol St., NW, Washington, DC,U.S.A.

i

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

PREFACE

Thispublicationpresentsabasicstandardforthesafeandreliableoperation,andthesubstantial and durableconstructionofself-operateddiaphragm-typenaturalgasserviceregulators,fornominalpipesize of1¼inches(32mm)andsmallerwithoutletpressureof2PSIG (3.48kpa)andless.Thisworkis the resultofyearsofexperience,supplementedby extensiveresearch.The standardisintendedto meettheminimumdesign,material,performanceandtestingrequirements forefficientuseofservice regulators.

Itisrecognized thatduringanytransitionperiodtothemetricsystem,sizesanddimensionsneedtobe expressedineither themetricsystemortheinch-poundsystemorinboth.Inthisdocument,bothsystems areused,withtheinch-poundunitsgivenpreference.Inmostcases,asoftconversionfromexisting inch- poundvaluesisshown.Softconversion impliesachangeinnomenclatureonly;inthisdocument,the alternativenomenclatures(metricand inch-pound)areshownbyusingparenthesesandcanbeused interchangeably.

Nothing inthisstandardistobeconsideredasinanywayindicatingameasureofqualitybeyond compliancewiththeprovisionsitcontains.Itisdesignedtoallowtheconstruction andperformanceof service regulatorsthatmayexceedthevariousprovisionsspecifiedinanyrespect.Inthisstandard’s preparation,recognitionwasintended tobegiventothepossibility ofimprovement,throughingenuity of designorotherwise.Asprogresstakesplace,revisionsmaybecomenecessary.Whenever suchrevisions arebelieveddesirable, recommendationsshouldbeforwardedtotheChairmanofANSIB109Committee, AmericanGasAssociation,400 N. Capitol St., NW, Washington, DC 20001

Usersofthisdocumentshouldconsultapplicablefederal,stateandlocalregulations. TheAmericanGas Association(A.G.A.)doesnot,bythepublicationofthisdocument,intendtopresentspecificationsthat arenotincompliancewithapplicablerules,andthisdocumentmaynotbeconstruedasdoingso.

NOTICE:ThisAmericanNationalStandardmayberevisedorwithdrawnatanytime.Theproceduresof theAmericanNationalStandardsInstitute,Inc.,(ANSI)requirethatactionbetakentoreaffirm,reviseor withdrawthisstandardnolaterthanfiveyearsfromthedateofpublication. Wheneveranyrevisionsare deemedadvisable,recommendations shouldbeforwardedtotheAmericanGasAssociation.Aformis includedforthatpurposeattheendofthisstandard.Purchasers ofAmericanNationalStandardsmay receivecurrentinformationonallstandardsbywritingtotheAmericanNationalStandards Institute, Inc.,11West42ndStreet,NewYork,NY10036,U.S.A.;bycalling(212)642-4900;byfaxingANSIat (212)398-0023;or byvisitingANSI’sWorld WideWeb site at purchase additionalcopies,visit Techstreet’s website at:

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

HISTORYOFDEVELOPMENTOFTHESTANDARD

FORSELF-OPERATED DIAPHGRAM-TYPE GAS SERVICE REGULATORS

InDecember1989atanadhocmeeting,representativesoftheANSIZ223.1andZ21committees, A.G.A., GasApplianceManufacturersAssociation(GAMA)andseveralotherindustryorganizations recommendedthatanANSIstandardforserviceregulatorsbedeveloped.Itwasrecognizedthatasystems approachtopressurecontrolandover-pressureprotectionwasnecessarytoensureconsistencybetween theANSIstandards thatcoverthehouseline andtheutilizationequipment.InApril1990,arevisionthat addedserviceregulatorstothescopeofANSIB109ASCwasapproved.

TheA.G.A.OperatingSectionassembleda serviceregulatorstandarddevelopmenttaskgroupwith representativesfromtheA.G.A.DistributionMeasurementCommittee,CustomerServiceandUtilization Committee,andDistributionEngineering Committee,andthemajorserviceregulatormanufacturers. A representativefromthe committeeon CanadianGasServiceRegulatorStandardwas alsoincluded. Throughoutthe development, consideration was given to harmonizing the new standard with the Canadianstandard.Afirstdraftwascompletedin1993.Thedraft wasrevisedanumber oftimesandwas approvedbythe A.G.A.OperatingSectionbeforeitwaspresentedtotheANSIB109Committeein January1996.

TheANSIB109Accredited StandardCommitteerequestedcommentsontheproposedserviceregulator standard in May1996.DuringapublicmeetingonJanuary30,1997,thecommitteeaddressedthe commentsandapproved thestandardforsubmittaltoANSIforendorsement asanAmericanNational Standard.

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

TABLEOF CONTENTS

DISCLAIMERS AND COPYRIGHT...... i PREFACE...... ii HISTORY OF DEVELOPMENTOFTHESTANDARD...... ii ACKNOWLEDGEMENTS...... iv ACCREDITEDSTANDARDS COMMITTEEB109...... vi

TABLE OFCONTENTS...... vi

1.0 Scope...... 1

2.0 Definitions...... 1

3.0 General...... 3

4.0 DesignRequirements...... 3

4.1 RegulatorValveBody...... 4

4.2 DiaphragmCasingAssembly...... 4

4.3 Diaphragm...... 5

4.4 LoadingSpring...... 6

4.5 Valve Linkage andDisk...... 6

4.6 Orifice...... 7

4.7 ExteriorSurface...... 7

4.8 Vent...... 8

4.9 Markings...... 8

5.0 QualificationTestfor ServiceRegulatorPerformance...... 9

5.1 General...... 9

5.2 TestEquipment...... 10

5.3 TestProcedures...... 11

APPENDIXA:GUIDELINESFORPRESENTATIONOF REGULATORPERFORMANCE DATA ...... 21

APPENDIXB:SI (METRIC)SYMBOLS...... 25

APPENDIXC:US(INCH-POUND)SYMBOLS...... 26

APPENDIX D: REFERENCED STANDARDS…………………………………………………………………27

FORMFORPROPOSALSONANSIB109.4...... 28

iv.

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

1.0 Scope

Thisstandardshallapplytotheminimumdesign,material,performance andtestingrequirements of

1¼ inches (32 mm) and smaller self-operated diaphragm-type natural gas service regulators operating atinletpressuresupto125psig(861.8kPa).Theseregulators areusedtocontrolthegas deliverypressure(alsoreferredtoassetpressureorP2)topressuresat 2psigorless(13.8kPa).

.

This standard shall apply only to regulators manufacturedafter the approval date of this standard.

2.0 Definitions

Regulator Accuracy:Thedeviationinoutletpressurefromthesetpoint.

Diaphragm: Aflexibleelementusedtosensetheoutletpressureand,incombinationwiththe loadingspringandlinkage,topositionthevalvetocontrolthedownstreampressure.

Diaphragmcaseorcasing:Thehousingforthediaphragmusuallyconsistsofanatmospheric orambientcasingandagasorfuelcasing.Thegasorfuelcasingandthediaphragmformthe gas orfuelchamber. The atmosphericorambientcasingandthediaphragm form the atmosphericorambientchamber.Thediaphragm sealsandseparatesthegasorfuelchamber fromtheatmosphericorambientchamber. Theatmosphericorambientchamberhousesthe loadingspringandventsintotheatmosphere.

DiaphragmPlate:Arigiddiskincontactwiththediaphragm, whichtransmitstheforceofthe loadingmechanism(weights,springs,etc)tothediaphragm.

Droop:Thedropinoutletpressurefromsetpointwithrespecttoincreasinggasflowrate.

FixedFactorRegulation:Regulatoraccuracyheldtotypically+/-1%ABSofsetpressureorP2 whichwillallowa utilityto metergaswithoutdoingpressurecorrectionat themeter

Hysteresis: Characteristicusedtodescribeadeviationintheregulatorperformancebasedon internalfriction,thediaphragm materialandflow.Thismayalsobereferredtoasregulator deadband.

InletPressure,Rated:Thehighestinletpressureallowedtobesuppliedtotheregulator.

InletPressure,Maximum: Thehighestinletpressuretowhichtestshavebeenconductedto determinethattheregulatorwillcontroltheoutletpressurewithinacceptablelimits.

Internal reliefvalve(IRV):Areliefvalvethatrelievesexcessiveoutletpressurethroughthe diaphragmandventassembly.Theinternalreliefsetpointisafunctionoftheregulator’s set pointandthemaximumallowablebuild-upofdownstreampressure.

Loading spring:Aspringplacedonthediaphragmordiaphragmplateandcontainedinthe atmosphericcasing,whichopposesthegaspressureexertedagainsttheopposite sideofthe diaphragm.Theoutletpressureoftheregulatorissetby thecompressionofthisspring.

Lock-up:Thestate oftheregulatorwheninletpressureisappliedandnogasisflowing.

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

Lock-upPressure: TheoutletpressureabovesetpressureorP2inwhichthereisnoflow throughtheregulator.

Orifice:Theprimaryflowrestrictorthatisusedtocontrol theflowofgas.Itisthepositionof thevalvediskwithrespecttotheseatingsurfaceoftheorificethatdeterminestheamountofgas flowingthroughtheregulator.

Over-pressure orunder-pressureshut-off:Adevicedesignedtostoptheflowofgaswhen theoutletpressuredropsbeloworincreasesabovea pre-determinedpressure.

Pressure,absolute:Thegaugepressureplusthebarometricoratmosphericpressure.(Pounds persquareinchabsolute,abbreviatedaspsia.)

Pressure,atmospheric:Thepressure duetotheweightoftheatmosphere(airandwatervapor) ontheEarth’ssurface.Theaverageatmospheric pressureatsealevelhasbeen definedas14.696 psia(101.33kPa).

Pressuredifferential:Thedifferenceinpressurebetweentwopointsina gassystem.

Pressuredrop:Thelossinpressurebetweentwopointsina systeminwhichgasisflowing.

Gaugepressure: Pressuremeasuredrelativetotheatmosphericpressure(atmosphericpressure beingdefinedaszero).Abbreviatedpsig.

Pulsation,hunting or chattering:An unstable state in which there is oscillationof the regulator diaphragm,linkageand/ormechanismsthat causesnoiseand/orfluctuatingoutlet pressure.

RoomTemperature: Atemperatureoffrom59°to77°F(15°to25°C)whichissuitableforhuman occupancy and at whichlaboratory experimentsare usuallyperformed.

Standardcubicfeetperhour(scf/h):Standardcubicfeetperhourrateofflow.Forthe purposeofthisstandard,acubicfootisdefinedasavolumeof1cubicfoot(0.0283cubic meter)ofgasatatemperatureof60°F(15.6°C)andatanabsolutepressureof14.73psia (101.56kPa).Allpublishedmaterialshallbebasedongaswitha 0.60specificgravity.

Sealcap:Thecapservingasaweathersealandexternalclosurefortheloadingspringand springadjustmentscrew.

Setflow:Theflowrateusedfortheinitialsettingoftheregulatorataspecifiedinletpressure andoutletsetpressure.

ServiceRegulator:the device on a service line that controls the pressure of gas delivered from a higher pressure to the pressure provided to the customer.

Setpressure,settingpressure,set pointorP2:Theinitial settingof theregulatoroutlet pressureat aspecifiedsetflowandinletpressure.

Springadjustmentmechanism:Usually a threaded part by which the loading spring is adjustedtosettheoutletpressure.

Valve: Avalveconsistsofthevalveorificeandvalvedisk,anditisusedtocontrolgasflow throughtheregulator.

Valvebody:Thatpartoftheregulatorthatconsistsofinletandoutletpipingconnectionsand theorifice.

Valvediskorvalveseat:Aresilientdiskorsimilardevicethatispositionedwithrespecttothe regulatorvalveorificetocontrolandshutofftheflowofgas.

Valvelinkage:Aleverormechanismconnectingthediaphragmtothevalvedisk.

Vent:Theopeningtotheatmosphericsideofthediaphragmcasingthroughwhichtheregulator breathes.Thismaybethepointofconnectionforaventpipeorventcapandcouldalsobethe openingforthereliefofexcessdownstreamgaspressure.

Ventcaporventscreen:Acapthatisinsertedintotheventoftheregulatortokeepbugs, insectsandwaterfromgettingintotheregulator’satmosphericorambientcasing.Itmayalso act asa restrictorintheventtopreventpulsationorchattering.

Water column(w.c.):Asinamanometer,ameansformeasuringpressure,usuallystatedas inchesofwatercolumn.

3.0 General

a) Regulatorsshall operate without objectionablenoise, malfunction,hunting,pulsationor chattering—(i)overanambienttemperature rangeof-20°Fto150°F(-28.9°Cto65.6°C) unlessalowertemperatureof-40°F(-40°C)isspecifiedbythemanufacturerand(ii)at inlet pressuresranginguptoamaximumof125psig(861.8kPa).

b) Allmaterialsintheregulatorandcomponentpartsshallbesuitablefortheintendeduse andshallbechemicallyresistanttoconstituentsnormallyfoundinnatural,manufactured andliquefiedpetroleum(LP)gases.

c) Copperpartsshallnotbepermitted.Copperalloypartsshallcontainnomorethan70%

copper.

d) Allsurfacesincontactwiththeatmosphereshallbeconstructedorprovidedwithafinish topreventdeterioration bynormalexposuretotheelements(RefertoSection4.7.2and ASTMB117).

e) Regulatorsshallbeara permanentandlegiblemarkingasperSection4.9,“Markings”.

f)Aninternalreliefvalvemaybeusedtolimitdownstreampressure, forthegivenorificeand inletpressurerating,intheeventofawide-open failure. Performance isbasedonaregulatorwithoutventpiping.Attachments tothevent,suchas pipefittings,piping,etc.,affectreliefcapacityanddownstream pressurebuild-up.Ifsuch materialmustbeused,contactthemanufacturerforrecommendations concerningsize, lengthandreliefperformanceissues.

g) ThisstandardcontainsSI(metric)equivalentstotheEnglishunitsofmeasure.Ifavalue forameasurementgiveninthisstandardisfollowedbyanequivalent valueinotherunits, thefirstvaluegivenistoberegardedastherequirement.Theequivalent valuemaybe approximate.Ifavalueforameasurementand anequivalent valueinotherunitsareboth specifiedasa quotedmarkingrequirement,thefirststatedunit,orboth,shallbeprovided.

4.0 Design Requirements

Regulators shall be constructed of materials (including lubricants and/or sealants) andcomponent partssuitablefortheintendeduseandshallbechemicallyresistanttoconstituents normallyfoundin natural,manufacturedandLPgases.Alternativematerialstothosespecifiedinsub-partsofthissection maybeusedwhenmanufacturersprovebytestingthattheminimumrequirementsofthestandardaremet.

4.1 RegulatorValveBody

4.1.1Theregulatorvalvebody,asaminimum,shallbeconstructedofmaterials meetingthefollowingspecifications inTableIbelow:

TABLEI

4.1.2The regulator valve body shall conform to the dimensions and pressure requirementsofthecurrenteditionoftheANSI/ASME B16.4,“GreyIron ThreadedFittings.” Directionofgasflowshallbemarked inaccordancewith Section4.9,“Markings,”ofthisstandard.

4.1.3Allpipethreads shallconformtoANSI/ASMEB1.20.1,“PipeThreads,(Inch) GeneralPurpose”specificationsandchamferedorcountersunk assetforthin ANSIB16.3,“Fitting,MalleableIronThreaded.”

4.1.4Thebodyshallbeofmaterialswithameltingpointofnotlessthan800°F (427°C).

4.1.5The valve body shall meet the strength, casting integrity and leakage- performancetestingrequirementsofthisstandard.

4.2 DiaphragmCasingAssembly

4.2.1Theatmosphericandgasdiaphragmcasesshallbeconstructedofmaterials meetingthefollowingspecifications inTableIIbelow:

TableII

4.2.2 Thediaphragmcasingshallbefreeofflash,cores,pitsandburrs.

4.2.3Assembledregulatorsshall withstandan outletpressureof 5psig (34.5 kPa) without leakage (vents shallbeblocked closed)orpermanent deformationofanycomponent.(Seetest proceduresunderSection5.3.)

4.2.4 TheregulatorshallwithstandacantileveredloadinaccordancewithSection

5.3.1,“CantileverLoadTest,”ofthisstandard,withoutaffectingperformance orcausingleakage,fractureorpermanentdeformationofanycomponent.

4.2.5The uppercoverof thediaphragmcase shallhavea ventconnectionas detailedinSection4.8.1.

4.2.6Thediaphragmcase,whichcontainsthenaturalgasundernormaloperation, shall withstandapressureof10psig(68.9kPa)withoutrupture.[Referto Section5.3.11(a),“ShellPressureTest.”]

4.2.7Allfastenersandfasteningcomponentsshallbecorrosion-resistant.Screws, boltsandnutsshallconformtoANSIBl.l.

4.2.8 Thediaphragmcaseshallbeofmaterialswithameltingpointofnotlessthan

800°F(427°C).

4.3 Diaphragm

4.3.1The diaphragm shall be constructed with materials that meet the tests describedinthisstandard.

4.3.2Allpartscomingincontactwiththediaphragmshallnothavesharpedges, burrs, projectionsor similarconditions,whichmight chafe or abradethe diaphragm.

4.3.3Adequatemeansshallbeprovidedtopreventthediaphragmanddiaphragm platefromrestrictingthevent.

4.3.4Thediaphragmshallwithstandadifferentialpressureofatleast5psig(34.5 kPa)withoutleakageorrupture.

4.4 LoadingSpring

4.4.1 Theloadingspringshallbeprotectedagainstcorrosion.

4.4.2The loading-spring mechanism shall be adjustable. The adjustment mechanismshallbeconstructedsothatitmaybeadjustedusingacommon slottedscrewdriver.

4.4.3Theadjustmentmechanismseal-caporcovershallbeprovidedwithameans forsealingthatdiscouragesunauthorized adjustments.Thespringadjustment seal-capor covershallbeofagas-tight,weather-resistantconstructionthat preventstheentryofwaterintothediaphragmchamberandcontainsthegas intheeventofaregulatorfailure.Thiswilldirectdischargeorrelievegasto theregulatorvent.

4.4.4Theregulatorshallbedesignedsothat,throughthefullrangeofmovementof the springadjustmentscrew,theadjustmentmechanismwillnotcausethe regulatorto bindormalfunction.

4.4.5Theloadingspringsshallbedesignedfortheoptimumsetpointpressureto minimizedroopcharacteristicsduetospring-compression effects.Thespring rangeshouldallowforanadjustment aboveandbelowtheoptimumsetpoint pressure.

4.4.6Thedesignshallincludeaprovisiontopreventthespringfrombeingfully compressed.Thespringshallbeadjustablewithatorquenogreaterthan2 foot-pounds(2.71Nm).

4.5 ValveLinkageandDisk

4.5.1Thevalvelinkageshallbeconstructedofacorrosion-resistantmaterialorbe protectedfromcorrosion.

4.5.2Levers andlinkages,whenused,shallbeheldinplacewithapivot, designed ina way thatcannotworklooseinnormaloperationandhandling.

4.5.3Ifatoggle-typelinkageisused,thereshallbeatravelstoptopreventthe linkagefromreachinga dead-centerposition.

4.5.4 The valvedisk shallbe made of resilientmaterialdesignedto withstandabrasionbythegasorbyimpuritiesinthegas,andcuttingbythevalve orifice;andtoresistpermanentdeformation whenpressedagainstthevalve orifice.

4.5.5Thevalvediskshallbesecurelyfastenedtoitsactuatorsothatitcannot become separated duringshipping, handlingoroperation. It shallbe removableforinspectionandreplacement.

4.5.6Forinternalreliefregulators,atravelstopshallbeincorporatedtoensure relief-valveoperation.

4.6 Orifice

4.6.1The valve orifice shall be constructed of materials that meet the tests describedinthisstandard.

4.6.2Thevalveorificeshallberemovable.Thevalveorificethreads,ifused,shall begas-tight. Ifathreadsealantisused,itshallbeofapermanentnon-drying type. Sealantsshallwithstand250°F (121°C) withoutaffectingthe gas tightnessofthethread.

4.6.3Theorificeseatgasket,ifused,shallbemadeofapressure-containing,non- galling,corrosion-resistantmaterial.

4.7 ExteriorSurface

Theexternalcomponentsoftheregulator shalleitherbemadeoforprotected by materialsresistanttoattackbytheatmosphere,weatherorsunlight,andtoagentsused inregulatorrepairandcleaning.Exteriorsshallbecapable ofmeetingorexceedingthe followingtests.

4.7.1Acceleratedweatheringtest:

Samplesoftheregulatorcaseorotherspecific external partsoftheregulatorthataretobetestedshallbepreparedand protectedusingexactlythesamemethods andmaterialsemployed in manufacturingthe regulators.Samples shall be exposedto thefollowing weatheringtests,withreference toASTMD822,ASTM D6695 (Daylight Filter), or ASTM D4587 (UVA-340) for 2,000 hours.Theexposure cycleshallconsistoftheperiodsofultravioletlightradiation andfreshwater sprayshowninTableIII.Following this 2,000 hour test, thereshallbenoappreciableprogressivecorrosion, or electrolyticaction,or any appreciablediscolorationordeleteriousreaction.

DRAFT DOCUMENT: This working draft of the ANSIB109standardis thepropertyof AGAandisbeingofferedforuseonly by the membersoftheANSI B109Committee to help revisethis standard.Thecontents ofthis reportshallnotbecopiedor disseminatedtoother individuals withoutprior permission fromAGA.

TABLE III

EXPOSURECYCLE

4.7.2Saltspraytest: Samples, as in Section4.7.1,shallbe mountedinthesalt-spray chamberintheirnormaloperatingposition.Theyshallbesubjectedtoa1000hoursalt-spraytestinaccordancewithASTMMethodB-117,"SaltSpray (Fog)Testing." At the conclusion of the test, the coating will meet or exceed the following acceptance criteria:

a)Ferrous based materials shall be evaluated using ASTM D-610 and have a score of Grade 4 or greater.

b)Non-ferrous metal materials shall be evaluated using ASTM D-714 and exhibit blister size No. 4 or greater with no more than a medium density.

4.8 Vent

4.8.1Theatmospheric sideofthediaphragmcaseshallhaveafemalethreaded3/4- inch(19mm)or1-inch(25.4mm)ventconnectionandshallconform tothe NPTstandardsofANSI/ASMEB1.20.1.Thethreadsshallbecountersunkor chamferedassetforthinANSIB16.3toprevent damagetothethreadswhen makinga threadedconnection.

4.8.2Theventconnectionshallhavearemovablenon-corrosiveventscreenorthe equivalent. Theventopeningshallbedesignedtoresist blockagebyice,sleet, snowandinsects,andberesistanttotheformation ofcorrosionresidueonthe surfacesofscreenports.NOTE:Historically,ifascreenisused,a 16-to20- mesh screenhas beenshownto beeffective.The ventopeningshallbe designedtomeettheenvironmentaltestrequirementsasdetailedinSection

5.3.12,“EnvironmentalTests.”

4.9 Markings

4.9.1Thefollowinginformationshallappearinapermanentandlegibleformon theregulator.

a) orificesize

b) pressureadjustingspringrange

c) monthandyearofmanufacture

d) manufacturer'snameortrademark

e) regulatortypeor model

4.9.2 The abovemarkingsarethe minimum requirements of this standard.

Additionaloptionalinformationmayappear ontheregulatoraccordingtothe user’sspecificrequirements,suchas:

a) IRVdesignation,ifappropriate

b) maximumrecommendedinlet pressurefortheorifice

c) theregulatorsetpoint

4.9.3Directionofthegasflowshallbeclearlyandpermanentlymarkedonthe regulatorbodyasprescribedinMSSStandardPracticeSP-25.

4.9.4 Theventoutletshallbeclearlyandpermanentlymarked"VENT."

5.0 Qualification Test for Service Regulator Performance

5.1 General

Thepurposeofthetestingistoevaluatetheregulatordesignforcompliancewiththisstandard. Designs shall be subjected to testing for regulator capacity, relief-valvecapacity, set point, lock-up performance, material strength and other factorsinfluencingtheperformancetotheregulator.

5.1.1Acarefulinspectionoftheregulatorshallbemadepriortotestingtoensurethat thereisnoforeignmaterialpresentintheregulator.

5.1.2 Theregulatorshallbetestedinthefollowingorientation(SeeFigure1,

).

a) Theregulatorshallbeinstalledina verticalrunofpipe. b) Thediaphragmshallbeina verticalposition.

c) Theventshallbepointeddownwardswithunrestrictedairflow.

5.1.3Theregulatorshallhaveanorificeselectedfortheappropriateoperating conditions.

5.1.4Alltestsshallbeconductedwithairatroomtemperature,unlessspecified otherwise.

5.1.5Alltestsshallbeconductedunderknownandcontrolledconditions,whereinthe accuracy

ofthecontainers, tapes, scalesandother“state-of-the-art”measurementdevicesaretraceabletotheNationalInstituteofStandardsandTechnology(NIST).

5.1.6Theinlet airtemperatureshallbemeasuredtoanerrornotexceeding±2°F(±1°C) ofactualvalue.Theinlet airtemperatureshallremainconstantwithin±5°F(±3°C) duringthetest runtorecorddataforeachspecifictestpoint.

5.2 TestEquipment

5.2.1 PressureMeasurement

Pressuregauges:Bourdontubepressuregaugesshouldhaveadialfacenot less than4inches(10.2 cm) indiameter. The smallestgraduation anduncertaintyofthemiddlehalfofthescaleshouldbeinaccordance withANSI B40.100GradeB,“DialType,ElasticElementGauges.” Thegaugeshouldbe selectedtoprovidereadingsinthemiddlehalfofitsscale.Calibration ofthe gaugeshouldbeinaccordancewithASMEPowerTestCode(PTC)19.2.

Manometers:Amanometershouldhavescalegraduationsnotgreaterthan0.1 inch(2.5mm).

Digitalpressuretransducers: Apressuretransducershouldhaveuncertaintyof betterthan±0.25%offullscale,takingintoaccountlinearity,repeatability and hysteresis.A digitaldisplayusedin conjunctionwiththetransducer shouldbeupdatedaminimumoftwicepersecond. Itshouldhavetraceable calibrationorbecalibratedinaccordancewithASMEPTC19.2.

5.2.2 PressureSensing

Allpressure-sensingpositionsandconnectionsshouldbeasshowninFig.1.

Piezometertubes:Body-sizedpiezometertubesshouldbeusedtosensetheinletandtheoutletpressuresimmediatelyupstreamanddownstream ofthe unit.Tubeslargerorsmallerthanthepipesizeoftheregulatorbodyshouldnotbeused.Theirdimensionsshouldcorrespondtothefollowingratios.

Tubeinlet:5pipeI.D.upstreamofringholes

Tubeoutlet:5pipeI.D.downstreamofringholes

Ringholes:Upthrough1-inchNPTpipe:Six1/16-inchholesequallyspaced aroundthepipe,

Greaterthan1-inchNPT:Eight3/32-inchholesequallyspaced aroundthepipe

Gaugeconnection:1/4-inchNPTregisteringthroughan1/8-inchhole intothepiezometerring

5.2.3 FlowMeasurement

Flowmeters:Orificemeters,rotarymetersorequivalents maybeusedto measuretheflowoftheregulator.Theflowresultgivenbythemetershould beaccuratetowithin±1.0%offlowrate.

5.3 TestProcedures

The followingdesign-qualificationtest proceduresshallbeperformedforeach regulator configurationandorificesizespecifiedbythemanufacturer.Forconsistent proofofregulatorperformance,eachregulatorofthemanufacturer’s samplelot(a minimumoftwo regulators)shallbesubjectedtoeachtestprocedureexceptfor destructive tests. Each sample tested shall pass all of the following tests to demonstratecompliance withthisstandard.Thetestsequence shallbeatthe manufacturer’sdiscretion.

5.3.1 CantileverLoadTest

The regulator body and diaphragm case assembly, when tested to the specifiedcantilever loadtest,shallnotshowevidenceoffracture,permanent deformation,externalleakageor impaired performance.Thetest shallbe conductedasfollows:

a) Mounttheregulatorinaverticalpipestandwiththediaphragm oriented horizontally.

b) Applyaloadof250lbs(113.4kg)atthatpointoftheregulatorcasethat isfarthestfromthecenterlineofthepipe.Theloadshallbemaintainedfor

10minutesandthenremovedwhiletheregulatorispressurizedtoalock- upcondition.Duringtheloadingcycletheregulatorshallnotleak.

c) Aftertheloadhasbeenremoved,examinetheregulatortoensure thatthe load has not affected performance or caused leakage, fracture or permanentdeformation ofanycomponentbycarryingouttheapplicable performancetestslistedinSections5.3.2,“Leakage”;5.3.3,“SetPoint”;

5.3.5,“Lock-up”;5.3.8,“Relief SetPoint”;and5.3.9,“ReliefValve

PerformanceTest.”

d) Iftheregulatorincorporatesanauxiliary device such as anOverPressureCutOff(OPCO)device, repeatthetestingwiththeauxiliary deviceatthefarthest distance fromthe centerlineofthepipe.

5.3.2 Leakage

Theleakage shallnotexceedtherequirementssetforthbelow when the regulator is subjectedto a back pressure of 5 psig (34.5kPa)through theregulatoroutletwiththeventandbodyinletconnectionblockedor pluggedforregulatorswithinternalreliefvalves.Fornon-internalrelief regulatorstheventshallbepipedtodownstream pressuresupplyand bodyinletconnectionblockedorplugged.Leakstotheatmospheremaybe detected, by waterimmersion orotheracceptablemeans ofmeasuring stated leakagerate. Whenusingtheimmersionmethod,submergethecomplete regulatorunderwater[atadepthnotgreaterthan2inches(5.1cm)]and watchfora continuousstreamof bubbles. There shall be no stream of bubbles greater than 1 bubble persecond, regardlessof the size of the bubbles.The leakageratefromtheregulatorshallnotexceed200cc/hr.The durationof theleaktest shouldbefora minimumof60seconds.

5.3.3 Set Point

Forpurposesofdevelopingauniformtestingprocedureandcomparison,the setpointshallbeestablishedwiththefollowingparameters:

a)Inletpressure:40psig(276kPa)orthemaximumallowableinletpressure perthemanufacturer’sspecification,iflessthan40psig(276kPa).

b)OutletPressure Ranges:

c) FlowRate:39scf/h(1.1m3/h)ofairtobesetbyslowlyincreasingthe flowratefromzero fora periodof5seconds.

During teststocheckthesetpoint,theregulatorshouldbestablewithno evidenceofhuntingorchattering.Otherpressuresandflowratesmaybeused to demonstratecompliancewiththisstandardforalternativerequirements. NOTE:Inletandoutletconditionsotherthanthosespecifiedabovewillaffect theperformanceoftheregulatorandcouldproducevaryingresults.

5.3.4 Hysteresis

Theregulatorhysteresisshallbecheckedby thefollowingtest.

a) Mounttheregulatorinaverticalpipemountwiththediaphragmoriented vertically.SetregulatorasdescribedinSection5.3.3,“SetPoint.”

b) Closethedownstreamvalvewithaconsistentclosing speedoveraperiod of5seconds,keepthevalveclosedfor5seconds,andthenreopenthe valveoveraperiodof5secondstoaflowof39scf/h(1.1 m3/h)ofair fora periodof5seconds.

c) Recordtheoutletpressure whileat39scf/h(1.1m3/h).Repeatthis

stepthreetimes.

d) Open thedownstreamvalve withaconsistentopeningspeedover aperiod of5secondstoaflowof200scf/h(5.67m3/h)ofair.Keepthevalvein thispositionfor5seconds,andthenclosethevalveoveraperiodof5 secondstoaflowrateof39scf/h(1.1m3/h)ofairforaperiod of5 seconds.

e) Recordtheoutletpressure whileat39scf/h(1.1m3/h). Repeat

thisstepthreetimes.

f)Therecordedreadingsshallbewithin±0.5inchw.c.(0.124kPa)ofthe establishedsetpoint.

5.3.5 Lock-up

Whenthedemandforflowfromtheregulatorisshutoff,theflowofgasshouldbestopped againstthemaximuminlet pressurerecommendedbythemanufacturerfortheapplicable orifice. Theoutletpressureunderno-flowconditions,or“lock-uppressure”,shallbe checkedusingthefollowingtest method:

a)Settheregulatorasdescribedinsection5.3.3.

b)Closetheoutletvalveat a constantspeedover5s.Allowoutletpressure tostabilizeandrecordlock-uppressure.Waitanadditional30secondsand ensurethereadsarecomparablewithinthemeasurementsystemaccuracy.

c)Ensurethatthelock-uppressureisnogreaterthan3inwc(0.75kPa) abovetheoriginalsetpressureforsetpointsof14inwcorless(3.48 kPa).Forsetpointsgreaterthan14inwc(3.48kPa)lockuppressureshall benotbegreaterthan115%ofsetpoint.Seesection5.3.3.

5.3.6 InletPressureSensitivity

Withthe regulatorset pointadjustedas per5.3.3,“Setpoint,”theoutlet pressureshallberecordedforvaryinginletpressureconditions froma minimumof5psig(34.5kPa)toamaximumof125 psig (861.8kPa)ortothe maximum inlet pressure,limited by either the body rating or orifice, as recommendedbythemanufacturer.Thisrequirementshallbedemonstrated bymaintaining theinletpressureof5psig(34.5kPa)foraminimumof10 secondswhileobserving theoutletpressure.Recordtheinletandoutlet pressures.Increasetheinletpressurein10psig(68.9 kPa)increments.Record theinletandoutletpressuresaftereachadjustment.Continuetheprocessuntil the125psig(861.8kPa)orthemaximuminletpressure—limitedbyeither thebodyratingortheorifice,asrecommendedbythemanufacturer—has beenreached.Thenreversetheprocedurebydecreasing theinletpressurein10psig(68.9kPa)increments,recordingtheinletandoutletpressuresfor eachstepuntiltheminimuminletpressureof5psig (34.5kPa)isreached. Thedatamaybemadeavailablebythemanufacturer uponrequest.

5.3.7 FlowCapacity

Theregulatorflowcapacityforeachorificespecifiedbythemanufacturer shallbedeterminedbythefollowingprocedure.Theactualtestsequencemay bedeterminedby manufacturer.

a)SetoutletpressureasdescribedinSection5.3.3.“SetPoint.”

b) Slowlyincreasetheflowrateuntiltheoutletpressureexceedstheupperor lowerlimits,whichever occursfirst,oftheaccuracyrangeaslistedinthe followingtable.

c) Logtheflowratewhenitem“b”ismet.Resultsaretobeexpressedin scf/hof0.6specificgravitygas.

Additionalcapacitiesmaybeestablishedforalternativeinlet pressuresusing theproceduredescribedabove.

5.3.8 ReliefSetPoint

For regulators equipped with an internal relief valve, the following designverificationtestshallbe performedforeachorificesizeavailable.

a)SetoutletpressureasdescribedinSection5.3.3.“SetPoint.”

b)Onceoutletpressurestabilizes,closedownstreamvalveallowingregulatortogo intolockup.

c)Slowlyapplyacontrolledbackpressureofairinto the outletsideofthe regulatorto yielda flowrateofapproximatelya1cubicfootanhour.

d)Thereliefvalveshould beginto relieveas downstreampressurerisesabovethelock-up pointoftheregulator.Aftertheregulatorhasbeenpressurized thestart-to-relievepointcanbe detectedby:

oapplyingaleak-detectionsolutiontotheregulatorvent

oplacing theventdischargeintoamaximumwatersealof1inchw.c.(0.25kPa)

oorotheracceptablemeans.

e)Todeterminetherelief-valvereseatpoint,removethebackpressureontheoutlet sideofthe regulatorandobservethepressureatwhichthereliefvalveceasestoreleasepressure. Therelief valveshallreseataccordingtothevaluesintableabove.Thereseatpressureshouldbecheckedto seethatit remainsconstantforaminimumof10seconds

5.3.9 Relief-ValvePerformanceTest

Theinternal relief-valvecapacity foreachorificesizeavailableshallbe testedasfollows.

a)Causethe regulatorto fail by disconnectingthe linkagebetweenthe diaphragmandvalvemechanism orthemostseverefailureconditionthat yieldsthehighestbuild-uppressure.

.

b)Disconnectanyventpipingtoallowtheregulatortoventtheflowofgas freely andunrestrictedtotheatmosphere.

c)Closethevalvedownstream ofregulatorsothatthereisnoflowofgas throughtheregulator.

d)Notetheoutletpressurewhileslowlyincreasing theinletpressurefrom zero psig to the maximum inlet pressure recommended by the manufacturerfortheorificeinstalled. Recordtheoutletpressureatthe maximuminletpressure, afterthesystemreachessteady-statecondition. Refertheappendixforhowtodisplaytheresult.

The user shall consider all downstream equipment limits and design considerations when selecting the relief performance. The maximum outlet pressure shall not exceed those guidelines established by governing standards and regulations. Table below show typical equipment allowable limits however applicable codes and standards shall be additionally considered.

5.3.10 EnduranceTest

Aregulatorshallwithstand100,000cyclesofopeningandclosingofthe valveunderthefollowingtest method.

a) Mounttheregulatorinaverticalpipestandwiththediaphragmoriented vertically.

b) SettheregulatorasdescribedinSection5.3.3,“SetPoint.”

c) Slowlyincreasetheinletpressuretotheregulatortothemaximuminlet pressurerecommendedbythe manufacturer.

d) The inlet and outlet piping of the regulatorshall be connectedto a mechanismthatwillopentheoutletpipingtotheatmosphereandclose theinletairsupplywhenthemaximuminlettestpressure isapplied,and thatwillclosetheoutletpipingand opentheinletairsupplywhennoinlet pressureisapplied.Thismechanismwillestablishanopen/closecycling oftheregulatorvalve.

NOTE: Acyclingrateof20to30cyclesperminuteshallbeused.The numberofcyclesshallbeaccuratelydetermined bymeansofacounter linkedtothepressurecontrolmechanismorby othersuitablemeans.

e) Aftereach25,000cyclesofoperation,theregulatorshallbecheckedfor setpointandlock-upinaccordancewithSection5.3.3,“SetPoint”and Section5.3.5,“Lock-Up” nottoexceedthefollowingguidelines.