EN 14129-2014 en LPG Equipment and accessories - Pressure relief valves for LPG pressure vessels《液化石油气(LPG)设备及附件 用于液化石油气(LPG)压力容器的卸压阀》.pdf

1、BSI Standards PublicationBS EN 14129:2014LPG Equipment and accessories Pressure relief valves for LPGpressure vesselsBS EN 14129:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14129:2014. Itsupersedes BS EN 14129:2004 which is withdrawn.The UK participatio

2、n in its preparation was entrusted to TechnicalCommittee PVE/19, LPG containers and their associated fittings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users

3、 are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 75822 5ICS 23.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the

4、Standards Policy and Strategy Committee on 28 February 2014.Amendments issued since publicationDate Text affectedBS EN 14129:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14129 February 2014 ICS 23.060.40 Supersedes EN 14129:2004English Version LPG Equipment and accessories - Pressure rel

5、ief valves for LPG pressure vessels quipements pour GPL et leurs accessoires - Soupapes de scurit pour rservoirs de GPL sous pression Flssiggas-Gerte und Ausrstungsteile - Sicherheitsventile fr Druckbehlter fr Flssiggas (LPG) This European Standard was approved by CEN on 30 November 2013. CEN member

6、s are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application

7、 to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Managemen

8、t Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li

9、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17,

10、 B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14129:2014 EBS EN 14129:2014EN 14129:2014 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .7 4 Operatin

11、g conditions 10 5 Materials 10 5.1 General . 10 5.2 Metallic materials 10 5.3 Non-metallic components 11 5.4 Lubricants, sealants, and adhesives 11 5.5 Certification . 11 6 Design 12 6.1 General . 12 6.2 Design parameters 13 6.3 Threads 14 6.4 Springs . 14 6.5 Additional requirements 14 6.6 Pressure

12、 relief valve with parallel thread . 15 6.7 Pressure relief valve for use with a changeover manifold . 15 6.8 Pilot operated pressure relief valve 15 7 Testing of the design 16 7.1 General . 16 7.2 Test requirements . 17 7.3 Dimensional checks . 19 7.4 Hydraulic proof test 19 7.5 Overtorquing test 1

13、9 7.6 Start to discharge pressure test 19 7.7 Discharge capacity test 20 7.8 Leak tightness tests . 20 7.9 Ageing test 20 7.10 Endurance test 21 7.11 Stress cracking test 21 7.11.1 General . 21 7.11.2 Mercurous nitrate immersion test . 21 7.11.3 Moist ammonia air stress cracking test . 21 7.12 Vacuu

14、m test . 21 7.13 Visual inspection 21 7.14 Test records 22 8 Marking 22 8.1 Pressure relief valves . 22 8.2 Thermal expansion valves . 22 8.3 Pilot operated pressure relief valve 23 9 Operating instructions . 23 BS EN 14129:2014EN 14129:2014 (E) 3 10 Packaging . 24 Annex A (informative) Terms used w

15、ith LPG pressure relief valves . 25 Annex B (normative) Special low temperature requirements for valves . 26 Annex C (normative) Ageing test . 27 C.1 General . 27 C.2 Ultraviolet light 27 C.3 Rain . 27 Annex D (informative) Environment checklist 30 Annex ZA (informative) Relationship between this Eu

16、ropean Standard and the Essential Requirements of EU Directive 97/23/EC 31 Bibliography 32 BS EN 14129:2014EN 14129:2014 (E) 4 Foreword This document (EN 14129:2014) has been prepared by Technical Committee CEN/TC 286 “Liquefied petroleum gas equipment and accessories”, the secretariat of which is h

17、eld by NSAI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2014, and conflicting national standards shall be withdrawn at the latest by August 2014. Attention is drawn to the possibility

18、that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14129:2004. This European Standard has been submitted for reference into: the RID 9; and the tec

19、hnical annexes of the ADR 10. NOTE These regulations take precedence over any clause of this European Standard. It is emphasised that RID/ADR/ADN are being revised regularly at intervals of two years which may lead to temporary non-compliances with the clauses of this European Standard. The major ch

20、anges to this revision include the addition of: pilot operated pressure relief valve; an ageing test, see 7.9 and Annex C; an endurance test, see 7.10; and a stress cracking test, see 7.11. This document has been prepared under a mandate given to CEN by the European Commission and the European Free

21、Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries a

22、re bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, P

23、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14129:2014EN 14129:2014 (E) 5 Introduction This European Standard calls for the use of substances and procedures that may be injurious to health and/or the environment if adequate precautions are n

24、ot taken. It refers only to technical suitability: it does not absolve the user from their legal obligations at any stage. Protection of the environment is a key political issue in Europe and elsewhere around the world. Protection of the environment in this document is understood in a very broad sen

25、se. The phrase is used, for example, in relation to the total life-cycle aspects of a product on the environment, including expenditure of energy, and during all phases of its existence, from mining of raw materials, to fabrication, packaging, distribution, use, scrapping, recycling of materials, et

26、c. NOTE 1 Annex D comprises an environmental checklist which highlights the clauses of this European Standard that address environmental aspects. Provisions have to be restricted to a general guidance. Limit values are specified in national laws. It is recommended that manufacturers develop an envir

27、onmental management policy. For guidance see the EN ISO 14000 series 6, 7 and 8. It has been assumed in the drafting of this European Standard that the execution of its provisions is entrusted to appropriately qualified and experienced people. All pressures are gauge pressures unless otherwise state

28、d. Valves designed in accordance with this standard are specifically for use in LPG applications. Valves manufactured in accordance EN ISO 4126-1 may also be used in certain LPG applications. NOTE 2 This European Standard requires measurement of material properties, dimensions and pressures. All suc

29、h measurements are subject to a degree of uncertainty due to tolerances in measuring equipment, etc. It may be beneficial to refer to the leaflet “measurement uncertainty leaflet” SP INFO 2000 27 13. BS EN 14129:2014EN 14129:2014 (E) 6 1 Scope This European Standard specifies the requirements for th

30、e design and testing of spring loaded pressure relief valves and thermal expansion valves for use in: static LPG pressure vessels, NOTE The pressure vessels can be situated above ground, underground or mounded. LPG pressure vessels on road tankers, rail tankers, tank-containers or demountable tanks.

31、 This document does not address production testing. Normative Annex B prescribes testing with conditioning at - 40 C for valves for use under extreme low temperature conditions. The requirements for pressure relief valve accessories such as isolating devices, changeover manifolds and vent pipes are

32、specified in EN 14071. EN 14570 identifies the requirements for the pressure relief valve capacities for static pressure vessels. EN 12252 identifies the requirements for the pressure relief valve capacities for road tankers. Valves designed in accordance with this standard are specifically for use

33、in LPG applications. Valves manufactured in accordance with EN ISO 4126-1 may also be used in certain LPG applications. Terms used with LPG pressure relief valves are described graphically in Annex A. 2 Normative references The following documents, in whole or in part, are normatively referenced in

34、this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 549:1994, Rubber materials for seals and diaphragms for gas appliances and gas e

35、quipment EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hard

36、ening jointing compounds EN 751-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 3: Unsintered PTFE tapes EN 837-1, Pressure gauges - Part 1: Bourdon tube pressure gauges - Dimensions, metrology, requirements and testing EN 1092-1:2

37、007+A1:2013, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges EN 1503-1:2000, Valves - Materials for bodies, bonnets and covers - Part 1: Steels specified in European Standards BS EN 14129:2014EN 14129:2014 (E) 7 EN 1503-2

38、:2000, Valves - Materials for bodies, bonnets and covers - Part 2: Steels other than those specified in European Standards EN 1503-3:2000, Valves - Materials for bodies, bonnets and covers - Part 3: Cast irons specified in European Standards EN 1503-4:2002, Valves - Materials for bodies, bonnets and

39、 covers - Part 4: Copper alloys specified in European Standards EN 1563:2011, Founding - Spheroidal graphite cast irons EN 10204, Metallic products - Types of inspection documents EN 10270-3:2011, Steel wire for mechanical springs - Part 3: Stainless spring steel wire EN 12165:2011, Copper and coppe

40、r alloys - Wrought and unwrought forging stock EN 12420:1999, Copper and copper alloys - Forgings EN 13906-1:2013, Cylindrical helical springs made from round wire and bar - Calculation and design - Part 1 : Compression springs EN 14071:2004, Pressure relief valves for LPG tanks - Ancillary equipmen

41、t ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 6957:1988, Copper alloys Ammonia test for stress corrosion resistance ANSI/ASME B1.20.11983, Pipe Threads, General Purpose (Inch) 3 Terms and definitions For the purpos

42、es of this document, the following terms and definitions apply. 3.1 liquefied petroleum gas LPG low pressure liquefied gas composed of one or more light hydrocarbons which are assigned to UN 1011, UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane, butane

43、 isomers, butene with traces of other hydrocarbon gases 3.2 pressure vessel assembly of the pressure-retaining envelope (including the openings and their closures) and non-pressure-retaining parts attached directly to it 3.3 pressure relief valve self-closing valve which automatically, without the a

44、ssistance of any energy other than that of the vapour concerned, discharges vapour at a predetermined pressure, and operates with a pop action 3.4 thermal expansion valve self-closing valve which automatically, without the assistance of any energy other than that of the fluid concerned, discharges f

45、luid at a predetermined pressure BS EN 14129:2014EN 14129:2014 (E) 8 3.5 spring loaded pressure relief valve valve in which the loading due to the vapour pressure underneath the sealing element is opposed only by the force of a spring 3.6 external pressure relief valve pressure relief valve which wh

46、en fitted to the LPG pressure vessel has the spring external to the pressure envelope Note 1 to entry: See Figure 1. 3.7 pilot operated pressure relief valve external pressure relief valve where the pressure setting is separate from the discharge function Note 1 to entry: See Figure 2. 3.8 internal

47、pressure relief valve pressure relief valve which when fitted to the LPG pressure vessel has the spring internal to the pressure envelope 3.9 semi-Internal pressure relief valve pressure relief valve which when fitted has the spring inside the pressure envelope and which has some of the working part

48、s and the wrenching section outside the pressure envelope Note 1 to entry: See Figure 3. 3.10 fully internal pressure relief valve pressure relief valve which, when fitted, has the spring, all working parts and the wrenching section inside the pressure envelope Note 1 to entry: See Figure 4. 3.11 no

49、minal set pressure predetermined pressure of the pressure relief valve at which the valve is set to start to discharge Note 1 to entry: RID 9 and ADR 10 require a capability of automatic opening under a pressure between 0,9 times and 1,0 times the test pressure of the pressure vessel to which they are fitted. 3.12 start to discharge pressure inlet pressure at which the first of a stream of bubbles appears at the outlet of a pressure relief valve through a water seal of not more than 50 mm water column, or other equivalent method 3.13