DIN EN 14071-2015 LPG equipment and accessories - Pressure relief valves for LPG pressure vessels - Ancillary equipment German version EN 14071 2015《液化石油气(LPG)罐用减压阀 液化石油气(LPG)压力容器用.pdf

1、August 2015 Translation by DIN-Sprachendienst.English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、 23.060.40!%E2“2341594www.din.deDDIN EN 14071LPG equipment and accessories Pressure relief valves for LPG pressure vessels Ancillary equipment;English version EN 14071:2015,English translation of DIN EN 14071:2015-08Flssiggas-Gerte und Ausrstungsteile Druckentlastungsventile fr Behlter fr Flssiggas

3、(LPG) Zusatzausrstung;Englische Fassung EN 14071:2015,Englische bersetzung von DIN EN 14071:2015-08quipements pour GPL et leurs accesoires Soupapes de scurit des rservoirs de gaz de ptrole liqufi (GPL) quipement auxiliaire;Version anglaise EN 14071:2015,Traduction anglaise de DIN EN 14071:2015-08Sup

4、ersedesDIN EN 14071:2005-02www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 27 pages 07.15 DIN EN 14071:2015-08 2 A comma is used as the decimal marker. National foreword This document (EN 14071:2015) has been prepared by Technical Commi

5、ttee CEN/TC 286 “Liquefied Petroleum Gas equipment and accessories” (Secretariat: NSAI, Ireland). The responsible German body involved in its preparation was the DIN-Normenausschuss Druckgasanlagen (DIN Standards Committee Pressurized Gas Installations), Working Committee NA 016-00-06 AA Flssiggas-G

6、erte und Ausrstung; Spiegelausschuss zu CEN/TC 286. The DIN Standard corresponding to the International Standard referred to in this document as follows: ISO 6957 DIN 50916-1 Amendments This standard differs from DIN EN 14071:2005-02 as follows: a) requirements for protection caps have been deleted;

7、 b) additional tests have been included; c) the terminology has been updated. Previous editions DIN EN 14071: 2005-02 National Annex NA (informative) Bibliography DIN 50916-1, Testing of copper alloys; stress corrosion cracking test in ammonia, testing of tubes, rods and profiles isEUROPEAN STANDARD

8、 NORME EUROPENNE EUROPISCHE NORM EN 14071 May 2015 ICS 23.060.40 Supersedes EN 14071:2004English Version LPG equipment and accessories - Pressure relief valves for LPG pressure vessels - Ancillary equipment quipements pour GPL et leurs accessoires - Soupapes de scurit des rservoirs de gaz de ptrole

9、liqufi (GPL) - quipement auxiliaire Flssiggas-Gerte und Ausrstungsteile - Druckentlastungsventile fr Behlter fr Flssiggas (LPG) -Zusatzausrstung This European Standard was approved by CEN on 5 March 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the c

10、onditions 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 to the CEN-CENELEC Management Centre or to any CEN member. This European Standard ex

11、ists 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 Management Centre has the same status as the official versions. CEN members are the national s

12、tandards 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia,

13、 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, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means res

14、erved worldwide for CEN national Members. Ref. No. EN 14071:2015 EEN 14071:2015(E)2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .7 4 Operating conditions .8 5 Materials .9 5.1 General 9 5.2 Metallic materials .9 5.3 Non-metallic components 10 5

15、.4 Lubricants, sealants, and adhesives 10 5.5 Inspection Documents . 10 6 Design 10 6.1 Introduction . 10 6.2 Pressure relief valve isolating devices . 10 6.2.1 General . 10 6.2.2 Actuation . 11 6.2.3 Indication of closure . 11 6.2.4 Guiding arrangements . 11 6.2.5 Isolating mechanism security . 11

16、6.2.6 Interchangeability . 11 6.3 PRV manifold . 12 6.3.1 General . 12 6.3.2 Indication of port closure . 15 6.3.3 Port closure . 15 6.4 Vent pipe 15 6.4.1 Design 15 6.4.2 Materials 15 6.4.3 Effect from external conditions . 15 6.5 Connections 15 6.6 Threads 15 6.7 Minimum requirements for springs 1

17、6 7 Testing of the design 16 7.1 General . 16 7.2 Test requirements . 16 7.3 Hydraulic proof test 17 7.4 Relief valve isolator test . 17 7.5 Testing of audible signal of isolating devices and residual flow of isolating devices and PRV manifolds . 17 7.6 Resistance of the isolating mechanism . 17 7.7

18、 Over-torque deformation test 18 7.8 Operation test 18 7.8.1 General . 18 7.8.2 System test 18 7.9 Stress cracking test 18 7.9.1 General . 18 7.9.2 Mercury(I)nitrate immersion test . 18 DIN EN 14071:2015-08 EN 14071:2015 (E) 3 7.9.3 Moist ammonia air stress cracking test 19 8 Production testing of i

19、solating devices and PRV manifolds 19 9 Marking and labelling 19 9.1 PRV isolating device . 19 9.2 Pressure relief valve PRV manifolds . 19 10 User instructions . 20 10.1 PRV isolating devices . 20 10.2 PRV manifolds . 20 Annex A (normative) Dimensions of master test pieces for PRV and isolating dev

20、ices 21 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC for pressure equipment 23 Bibliography 25 DIN EN 14071:2015-08 EN 14071:2015(E)4 Foreword This document (EN 14071:2015) has been prepared by Technical Committee CEN/TC 2

21、86 “Liquefied petroleum gas equipment and accessories”, the secretariat of which is held 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 November 2015, and conflicting national standards

22、shall be withdrawn at the latest by November 2015. Attention is drawn to the possibility 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 14071:2

23、004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free 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. T

24、he major changes in this revision include: the removal of requirements for protection caps; the introduction of additional testing; an update of the terminology. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement

25、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, Portugal, Romania, Slov

26、akia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 14071:2015-08 EN 14071:2015(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 not taken. It refers

27、 only to technical suitability: it does not absolve the user from their legal obligations at any stage. It is recommended that manufacturers develop an environmental management policy. For guidance, see the EN ISO 14000 series 1, 2 and 3. It has been assumed in the drafting of this European Standard

28、 that the execution of its provisions is entrusted to appropriately qualified and experienced people. All pressures are gauge pressures unless otherwise stated. NOTE This European Standard requires measurement of material properties, dimensions and pressures. All such measurements are subject to a d

29、egree 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 5. DIN EN 14071:2015-08 EN 14071:2015(E)6 1 Scope This European Standard specifies the design, testing and inspection requirements for pre

30、ssure relief valve isolating devices, valve manifolds, vent pipes and system assemblies which are, where necessary, used with pressure relief valves for use in static pressure vessels for Liquefied Petroleum Gas (LPG) service. This European Standard addresses both prototype testing and production te

31、sting of isolating devices and PRV manifolds. Pressure relief valves for LPG pressure vessels are specified in EN 14129:2014. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated referenc

32、es, 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 equipment EN 751-1, Sealing materials for metallic threaded joints in contac

33、t 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-hardening jointing compounds EN 751-3, Sealing materials for metallic threaded join

34、ts in contact with 1st, 2nd and 3rd family gases and hot water Part 3: Unsintered PTFE tapes EN 1092-1, 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: S

35、teels specified in European Standards EN 1503-2:2000, 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 Valv

36、es Materials for bodies, bonnets and covers Part 4: Copper alloys specified in European Standards EN 1563:2011, Founding Spheroidal graphite cast irons EN 10204:2004, Metallic products Types of inspection documents EN 10270-3:2011, Steel wire for mechanical springs Part 3: Stainless spring steel wir

37、e EN 12164:2011, Copper and copper alloys Rod for free machining purposes EN 12165:2011, Copper and copper alloys Wrought and unwrought forging stock EN 12420, Copper and copper alloys Forgings EN 13480-3:2012, Metallic industrial piping Part 3: Design and calculation DIN EN 14071:2015-08 EN 14071:2

38、015 (E) 7 EN 13906-1, Cylindrical helical springs made from round wire and bar Calculation and design Part 1 : Compression springs EN 14129:2014, LPG Equipment and accessories Pressure relief valves for LPG pressure vessels ISO 6957, Copper alloys Ammonia test for stress corrosion resistance ASME B1

39、.20.1:2013, Pipe threads, general purpose (inch) 3 Terms and definitions For the purposes 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

40、, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane, butane isomers, butene with traces of other hydrocarbon gases 3.2 pressure vessel assembly of the pressure envelope (including the openings and their closures) and non-pressure-retaining parts attached directly to it 3.

41、3 pressure relief valve (PRV) self-closing valve which automatically, without the assistance of any energy other than that of the vapour concerned, discharges vapour at a predetermined pressure, and operates with a pop action Note 1 to entry: This is known as a “safety valve” in ADR. 3.4 pressure re

42、lief valve system PRV system pressure relief valve(s) for use on the pressure vessel complete with isolating device or PRV manifold, and vent pipe where appropriate 3.5 pressure relief valve isolating device device fitted between the storage tank and the external pressure relief valve, which permits

43、 the replacement of the pressure relief valve without de-pressuring the pressure vessel 3.6 coefficient of discharge Kd ratio of the actual measured flow capacity divided by the calculated theoretical capacity for the same fluid at the same operating conditions 3.7 pressure relief valve manifold PRV

44、 manifold device fitted to a storage vessel permitting two or more pressure relief valves to be fitted only one of which can be isolated at a time, which permits replacement of the isolated pressure relief valve without depressurizing the vessel DIN EN 14071:2015-08 EN 14071:2015 (E) 8 3.8 discharge

45、 capacity capacity at the flow rating pressure of a pressure relief valve expressed in cubic metres per minute of free air at STP 3.9 vent pipe open-ended pipe, fitted with a protection cap and attached to the pressure relief valve outlet, to direct discharged fluid away from the protected pressure

46、vessel surface 3.10 design signal flow limited flow of LPG intended to equalise pressures so that a replacement PRV can be properly fitted to an isolating device; indicate the effectiveness of the internal shut off in an isolating device before the PRV is completely removed; and produce an acoustic

47、signal 3.11 Standard Temperature and Pressure STP 15,6 C (288,7 K), 1,013 bar absolute (0,1013 MPa absolute) 3.12 flow rating pressure inlet pressure at which the discharge capacity is measured 3.13 lift actual travel of the sealing disc away from the closed position 3.14 sealing element non-metalli

48、c resilient component which effects a seal by contact with the valve seat 3.15 valve seat normally raised area of the pressure relief valve body on to which the sealing element effects a seal 3.16 maximum allowable pressure PS maximum pressure for which the equipment is designed Note 1 to entry: All pressures are gauge pressures unless otherwise stated. 3.17 nominal diameter (DN) numerical designation of the size of a component, which is a convenient rou