1、BRITISH STANDARDBS EN 13953:2003Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas(LPG)The European Standard EN 13953:2003 has the status of a British StandardICS 23.060.40?Licensed Copy:Uni of Science&Technology User,University of Science&Tech,Sat Sep 24 17:10
2、:11 BST 2005,Uncontrolled Copy,(c)BSIBS EN 13953:2003This British Standard,was published under the authority of the Standards Policy and Strategy Committee on 01 July 2003 BSI 01 July 2003ISBN 0 580 42208 9National forewordThis British Standard is the official English language version of EN 13953:20
3、03.The UK participation in its preparation was entrusted to Technical Committee PVE/19,LPG containers and their associated fittings,which has the responsibility to:A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards
4、which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled“International Standards Correspondence Index”,or by using the“Search”facility of the BSI Electronic Catalogue or of British Standards Online.This publicati
5、on does not purport to include all the necessary provisions of a contract.Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.aid enquirers to understand the text;present to the responsible international/Europ
6、ean committee any enquiries on the interpretation,or proposals for change,and keep the UK interests informed;monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover,an inside front cover,the EN title page,pages 2 to
7、15 and a back cover.The BSI copyright date displayed in this document indicates when thedocument was last issued.Amendments issued since publicationAmd.No.DateCommentsLicensed Copy:Uni of Science&Technology User,University of Science&Tech,Sat Sep 24 17:10:11 BST 2005,Uncontrolled Copy,(c)BSIEUROPEAN
8、 STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13953May 2003ICS 23.060.40English versionPressure relief valves for transportable refillable cylinders forLiquefied Petroleum Gas(LPG)Soupapes de sret des bouteilles transportables etrechargeables pour gaz de ptrole liqufis(GPL)Sicherheitsventile fr ortsbewe
9、gliche,wiederbefllbareFlaschen fr Flssiggas(LPG)This European Standard was approved by CEN on 21 April 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alterati
10、on.Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions(English,French,German).A version in any other language made by translationunder t
11、he responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Mal
12、ta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre:rue de Stassart,36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means re
13、servedworldwide for CEN national Members.Ref.No.EN 13953:2003 ELicensed Copy:Uni of Science&Technology User,University of Science&Tech,Sat Sep 24 17:10:11 BST 2005,Uncontrolled Copy,(c)BSIEN 13953:2003(E)2ContentsPageForeword.31Scope.42Normative references.43Terms,definitions and abbreviations.43.1T
14、erms and definitions.43.2Abbreviations.64Operating temperatures.65Materials.65.1General.65.2Metallic materials.65.3Non-metallic components.75.4Lubricants,sealants and adhesives.76Design.76.1General.76.2Threads.76.3Springs.86.4Test requirements.87Testing and inspection of the design.87.1General.87.2H
15、ydraulic proof test.87.3Start to discharge and discharge capacity test.97.4Leak test.97.5Test records.97.6Design changes.108Production testing.109Marking.1010Documentation.10Annex A(informative)Terms used with pressure relief valves.11Annex B(normative)Special low temperature requirements for valves
16、.12Annex C(informative)Sizing of pressure relief valves for LPG cylinders.13Annex D(informative)Production testing.14D.1General.14D.2Dimensional inspection.14D.3Setting and leak testing of pressure relief valves.14Bibliography.15Licensed Copy:Uni of Science&Technology User,University of Science&Tech
17、,Sat Sep 24 17:10:11 BST 2005,Uncontrolled Copy,(c)BSIw w w.b z f x w.c o mEN 13953:2003(E)3ForewordThis document(EN 13953:2003)has been prepared by Technical Committee CEN/TC 286 Liquefied petroleumgas equipment and accessories,the secretariat of which is held by NSAI.This European Standard shall b
18、e given the status of a national standard,either by publication of an identical text orby endorsement,at the latest by November 2003,and conflicting national standards shall be withdrawn at the latestby November 2003.Annexes A,C and D are informative,Annex B is normative.According to the CEN/CENELEC
19、 Internal Regulations,the national standards organizations of the followingcountries are bound to implement this European Standard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Swi
20、tzerland and the United Kingdom.Licensed Copy:Uni of Science&Technology User,University of Science&Tech,Sat Sep 24 17:10:11 BST 2005,Uncontrolled Copy,(c)BSIw w w.b z f x w.c o mEN 13953:2003(E)41 ScopeThis European Standard specifies the design,testing and marking requirements for spring loaded pre
21、ssure reliefvalves,for use in liquefied petroleum gas(LPG)cylinders.These valves can be either an integral part of a cylinder valve(see EN 13152 and EN 13153)or a separate device.This European Standard does not exclude the use of other designs of pressure relief devices that provide a similarlevel o
22、f safety.2 Normative referencesThis European Standard incorporates by dated or undated reference,provisions from other publications.Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter.Fordated references,subsequent amendments to or revi
23、sions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision.For undated references the latest edition of thepublication referred to applies(including amendments).EN 549,Rubber materials for seals and diaphragms for gas appliances and gas eq
24、uipment.EN 751(all parts),Sealing materials for metallic threaded joints in contact with 1st,2nd and 3rd family gases and hotwater.EN 837-1,Pressure gauges-Part 1:Bourdon tube pressure gauges-Dimensions,metrology,requirements andtesting.EN 1563,Founding Spheroidal graphite cast irons.EN 10270-3,Stee
25、l wire for mechanical springs-Part 3:Stainless spring steel wire.EN 12164,Copper and copper alloys Rod for free machining purposes.EN 12420,Copper and copper alloys Forgings.EN 13906-1,Cylindrical helical springs made from round wire and bar Calculation and design-Part 1:Compression springs.3 Terms,
26、definitions and abbreviations3.1 Terms and definitionsFor the purposes of this European Standard,the following terms and definitions apply:3.1.1LPGmixture of light hydrocarbons,gaseous under standard atmospheric conditions,which can be liquefied by increasedpressure or decreased temperature.The main
27、 components are propane,propene,butane and butene isomers3.1.2pressure relief valvevalve which automatically,without the assistance of any energy other than that of the fluid concerned,discharges aquantity of fluid so as to prevent a predetermined safe pressure being exceeded,and which is designed t
28、o re-closeand prevent the further flow of fluid after normal pressure conditions of service have been restored.The loadingdue to the fluid pressure underneath the valve-sealing element is opposed by a springLicensed Copy:Uni of Science&Technology User,University of Science&Tech,Sat Sep 24 17:10:11 B
29、ST 2005,Uncontrolled Copy,(c)BSIw w w.b z f x w.c o mEN 13953:2003(E)53.1.3pressure/flow termsNOTE 1Terms used with LPG pressure relief valves are described graphically in annex A.NOTE 2All pressures are gauge pressures unless otherwise specified.3.1.3.1nominal set pressurepredetermined pressure of
30、the pressure relief valve at which the valve is set to start to discharge3.1.3.2start to discharge pressureinlet pressure at which the first of a stream of bubbles appears at the outlet of a pressure relief valve through awater seal of not more than 50 mm water column,or other equivalent method3.1.3
31、.3pop actionrapid opening of the valve sealing element to achieve full lift,resulting from an increase of inlet pressure creating asudden increase in force and compression of the spring3.1.3.4overpressurepressure range between the nominal set pressure and the flow rating pressure3.1.3.5re-seat press
32、ureinlet pressure at which the sealing element effects a seal with the valve seat after the valve has been subjected topop action3.1.3.6flow rating pressureinlet pressure at which the discharge capacity is measured3.1.4nominal discharge capacityminimum discharge capacity at the flow rating pressure
33、expressed in cubic metres per minute of free air at STProunded down to one decimal place3.1.5discharge capacitycapacity at the flow rating pressure of a pressure relief valve expressed in cubic metres per minute of free air atSTP3.1.6sealing elementnon-metallic resilient component which effects the
34、seal by contact with the pressure relief valve seat3.1.7valve seatnormally raised area of the pressure relief valve body on to which the sealing element effects a seal3.1.8cylinder valvevalve fitted to transportable refillable LPG cylinders from 0,5 l up to 150 l water capacity intended to convey LP
35、Gonly3.1.9leak tightnessresistance to leakage to atmosphere across the valve seat or any other pressure containing component when thevalve is closedLicensed Copy:Uni of Science&Technology User,University of Science&Tech,Sat Sep 24 17:10:11 BST 2005,Uncontrolled Copy,(c)BSIw w w.b z f x w.c o mEN 139
36、53:2003(E)63.2 AbbreviationsSTPStandard Temperature and Pressure 15,6 C(288,7 K),1,013 bar absolute(0,1013 MPa absolute)4 Operating temperaturesValves designed in accordance with this European Standard shall be suitable for:?a minimum operating temperature of-20 C in service.Temperatures below this
37、are acceptable for shortperiods for example,when filling;?a minimum operating temperature of -40 C for those parts of Europe where valves are subject to moresevere temperature conditions.The material and design shall be shown to be satisfactory for operations underthese conditions and shall meet the
38、 requirements of annex B;?a maximum operating temperature of 60 C.Temperatures above this are acceptable for short periods.5 Materials5.1 General5.1.1Materials in contact with LPG shall be physically and chemically compatible with LPG under all normaloperating conditions for which the valve is inten
39、ded.5.1.2Materials for valve components shall be selected to give adequate strength in service.Consideration shallbe given to all modes of failure including atmospheric corrosion,brass dezincification,stress corrosion,impact ormaterial failure.5.1.3 Alternative materials to those listed in 5.2 are n
40、ot precluded,providing they can be shown to beequivalent.5.1.4Where pressure relief valves are an integral part of a cylinder valve,the material requirement of thecylinder valve standard shall be complied with.5.2 Metallic materials5.2.1Metallic materials for valves shall be stainless steel,copper a
41、lloys,aluminium alloys,zinc alloys,or othersuitable materials,and shall comply with 5.1.1 and 5.1.2.5.2.2Hot stamped brass shall be non-porous and shall be suitable for machining or other processes.Sand-castbrass shall not be used.Leaded brass shall be CW614N or CW617N in accordance with EN 12420 an
42、d EN 12164.Cold drawn brass rods up to 45 mm wide in cross-section shall only be used after heat treatment and testing forinternal cracking.Cold drawn brass rods greater than 45 mm wide in cross-section shall not be used.Components produced from stamping brass shall not exhibit cold shuts,also known
43、 as folds,or surface defects.5.2.3Components,when made from stainless steel,shall contain not less than 17%chromium and not less than7%nickel.Springs shall be manufactured from stainless steel in accordance with EN 10270-3 or material with an equivalentresistance to corrosion.5.2.4Castings shall be
44、free from inclusions and surface defects,which adversely affect the strength,leaktightness or performance of the valve.Licensed Copy:Uni of Science&Technology User,University of Science&Tech,Sat Sep 24 17:10:11 BST 2005,Uncontrolled Copy,(c)BSIw w w.b z f x w.c o mEN 13953:2003(E)75.2.5Spheroidal gr
45、aphite cast iron in accordance with EN 1563,with an elongation at fracture of more than 18%shall be used.Other ductile irons or cast irons shall not be used.5.3 Non-metallic components5.3.1All non-metallic materials in contact with LPG shall not distort,harden or adhere to the body or seat faceto su
46、ch an extent as to impair the function of the valve.All rubber materials shall also comply with the requirements of EN 549.The ozone test in EN 549 shall only becarried out where gaskets/seals are exposed to atmosphere.5.3.2For guidance on the choice of non-metallic materials,see 3ISO 11114-2.5.4 Lu
47、bricants,sealants and adhesivesWhere used on operating threads and seals,lubricants,sealants and adhesives shall be compatible with LPG andnot interfere with the operation of the valve.Sealants shall comply with the requirements of EN 751.6 Design6.1 General6.1.1Pressure relief valves shall be desig
48、ned to operate with a pop action within the overpressure of the valve.The valve components shall be designed with adequate strength and adequate clearances to ensure correctoperation in service.6.1.2The sealing element carrier shall be manufactured from a metallic material with a minimum melting poi
49、nt of450 C.Non metallic materials can be used if they are able to meet the same requirements without deformation ordegradation which would impair the operation of the valve.6.1.3The design shall incorporate guiding arrangements of the sealing element to ensure reliable operation andleak tightness.6.
50、1.4The sealing element shall be secured to prevent it becoming loose in operation.6.1.5Means shall be provided to lock and/or to seal the pressure relief valve in order to prevent and/or revealany tampering with the settings.Adhesive shall not be used.6.1.6When pressure relief valves are provided wi
