1、BSI Standards PublicationBS EN 13953:2015LPG equipment and accessories Pressure relief valvesfor transportable refillablecylinders for LiquefiedPetroleum Gas (LPG)BS EN 13953:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13953:2015. It supersedes BS EN 13
2、953:2003 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PVE/19, LPG containers and their associated fittings.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include
3、 all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79329 5ICS 23.060.40Compliance with a British Standard cannot confer immunity from legal obligations.This Briti
4、sh Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 13953:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13953 March 2015 ICS 23.060.40 Supersedes EN 13
5、953:2003+A1:2007English Version LPG equipment and accessories - Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas (LPG) quipements et accessoires GPL - Soupapes de scurit des bouteilles transportables et rechargeables pour gaz de ptrole liqufis (GPL) Flssiggas
6、-Gerte und Ausrstungsteile - Sicherheitsventile fr ortsbewegliche, wiederbefllbare Flaschen fr Flssiggas (LPG) This European Standard was approved by CEN on 29 November 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Euro
7、pean 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 exists in three official version
8、s (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 standards bodies of Austria, Be
9、lgium, 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, Slovenia, Spain, Sweden, Swit
10、zerland, 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 reserved worldwide for CEN nation
11、al Members. Ref. No. EN 13953:2015 EBS EN 13953:2015EN 13953:2015 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Operating Conditions 7 5 Materials .7 5.1 General 7 5.2 Metallic materials .8 5.3 Non-metallic components .8 5.4 Lubricants
12、, sealants and adhesives 8 6 Design .8 6.1 General 8 6.2 Threads .9 6.3 Springs 9 7 Type Testing and inspection of the design .9 7.1 General 9 7.2 Test requirements . 10 7.3 Dimensional checks . 11 7.4 Hydraulic pressure proof test 11 7.5 Leak tightness test before ageing . 12 7.6 Start to discharge
13、 pressure test 12 7.7 Discharge capacity test 12 7.8 Leak tightness tests . 13 7.9 Endurance test 13 7.10 Visual Inspection 13 8 Test records 13 9 Production testing 13 10 Marking 14 11 Documentation 14 Annex A (informative) Terms used with pressure relief valves . 15 Annex B (normative) Special low
14、 temperature requirements for valves 16 Annex C (normative) Sizing of PRVs for LPG cylinders . 17 Annex D (informative) Production testing 18 D.1 General . 18 D.2 Setting and leak testing of PRVs . 18 D.3 Batch samples . 18 D.4 Rejection criteria . 18 D.5 Documentation 18 Bibliography . 19 BS EN 139
15、53:2015EN 13953:2015 (E) 3 Foreword This document (EN 13953:2015) has been prepared by Technical Committee CEN/TC 286 “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 publ
16、ication of an identical text or by endorsement, at the latest by September 2015, and conflicting national standards shall be withdrawn at the latest by September 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 CEN
17、ELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13953:2003+A1:2007. This European Standard has been submitted for reference into the technical annexes of the ADR 1. NOTE These regulations take precedence over any clause of this European S
18、tandard. It is emphasized that ADR is regularly at intervals of two years which may lead to temporary non-compliances with the clauses of this European Standard. The major changes to this revision include: change to the nominal set pressure; restructure of Clause 7, Testing and Inspection of the des
19、ign; introduction of an endurance test. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imp
20、lement 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, Romani
21、a, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13953:2015EN 13953:2015 (E) 4 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 re
22、fers 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 sense. The phrase
23、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, etc. It is essent
24、ial that provisions be restricted to a general guidance. Limit values are specified in national laws. It is recommended that manufacturers develop an environmental management policy. For guidance see the EN ISO 14000 series. It has been assumed in the drafting of this European Standard that the exec
25、ution 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 degree of uncer
26、tainty due to tolerances in measuring equipment etc. It may be beneficial to refer to the leaflet “measurement uncertainty leaflet” SP INFO 2000 27 2. BS EN 13953:2015EN 13953:2015 (E) 5 1 Scope This European Standard specifies the design, testing and marking requirements for spring loaded pressure
27、relief valves (PRV), for use in liquefied petroleum gas (LPG) cylinders. These PRVs can be either an integral part of a cylinder valve (see EN ISO 14245 3 and EN ISO 15995 4) or a separate device. This European Standard does not exclude the use of other designs of pressure relief devices that provid
28、e a similar level of safety. 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 references, only the edition cited applies. For undated references, the latest edition of the referenced
29、document (including any amendments) applies. EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment 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, Seal
30、ing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water Part 2: Non-hardening jointing compounds EN 7513 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water Part 3: Unsintered PTFE tapes EN 837-1:19
31、96, Pressure gauges Part 1: Bourdon tube pressure gauges Dimensions, metrology, requirements and testing EN 10270-3, Steel 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
32、 13906-1, Cylindrical helical springs made from round wire and bar Calculation and design Part 1: Compression springs EN ISO 11114-1, Gas cylinders Compatibility of cylinder and valve materials with gas contents Part 1: Metallic materials (ISO 11114-1) EN ISO 11114-2, Gas cylinders Compatibility of
33、cylinder and valve materials with gas contents Part 2: Non-metallic materials (ISO 11114-2) 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 whic
34、h are assigned to UN 1011, UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane, butane isomers, butene with traces of other hydrocarbon gases BS EN 13953:2015EN 13953:2015 (E) 6 3.2 pressure relief valve PRV self-closing valve which automatically, without
35、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. 3.3 nominal set pressure predetermined pressure of the pressure relief valve at which the val
36、ve is set to start to discharge 3.4 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 3.5 pop action rapid opening of the pressure
37、relief valve sealing element so that the pressure relief valve is fully open, resulting from an increase of inlet pressure creating a sudden increase in force and compression of the spring 3.6 overpressure pressure increase between the nominal set pressure and the flow rating pressure Note 1 to entr
38、y: Usually expressed as a percentage of nominal set pressure. 3.7 reseat pressure inlet pressure at which the sealing element effects a seal with the valve seat after the valve has been subjected to pop action 3.8 flow rating pressure inlet pressure at which the discharge capacity is measured 3.9 di
39、scharge capacity capacity at the flow rating pressure of a pressure relief valve expressed in cubic metres per minute of free air at STP 3.10 nominal discharge capacity minimum discharge capacity at the flow rating pressure expressed in cubic metres per minute (m3/min) of free air at STP rounded dow
40、n to one decimal place 3.11 sealing element non-metallic resilient component which affects a seal by contact with the valve seat BS EN 13953:2015EN 13953:2015 (E) 7 3.12 valve seat normally raised area of the valve body on to which the sealing element effects a seal 3.13 cylinder valve primary shuto
41、ff device intended for liquid filling and liquid or vapour service fitted to LPG cylinders Note 1 to entry: The valve can also include additional devices e.g. liquid level indicator, excess flow device, pressure relief valve, sediment tube, non-return valve and eduction tube. 3.14 leak tightness res
42、istance to leakage to atmosphere across the valve seat or any other pressure containing component when the valve is closed 3.15 Standard Temperature and Pressure STP 15,6 C (288,7 K), 1,013 bar absolute (0,1013 MPa absolute) 4 Operating Conditions 4.1 Terms used with PRVs are described graphically i
43、n Annex A. 4.2 Valves designed in accordance with this European Standard shall be suitable for: a minimum operating temperature of 20 C. Temperatures below this are acceptable for short periods for example, when discharging; a minimum operating temperature of 40 C for those parts of Europe where val
44、ves are subject to more severe temperature conditions. The material and design shall be shown to be satisfactory for operations under these conditions and shall meet the requirements of Annex B. Where the PRV is integral with a cylinder valve suitable for temperature of 40 C, the PRV shall also be d
45、esigned and tested for a temperature of 40 C; and a maximum operating temperature of 65 C. 5 Materials 5.1 General 5.1.1 Materials in contact with LPG shall be physically and chemically compatible with LPG under all normal operating conditions for which the valve is intended and shall meet the requi
46、rements for propane and butane in accordance with EN ISO 11114-1 and EN ISO 11114-2. 5.1.2 Materials for valve components shall be selected to give adequate strength in service. Consideration shall be given to all modes of failure including atmospheric corrosion, brass dezincification, stress corros
47、ion, impact or material failure. 5.1.3 Alternative materials to those listed in 5.2 are not precluded, providing they can be shown to be equivalent. 5.1.4 Where PRVs are an integral part of a cylinder valve, the material requirements for the cylinder valve standard shall be complied with. BS EN 1395
48、3:2015EN 13953:2015 (E) 8 5.2 Metallic materials 5.2.1 Hot stamped brass shall be non-porous and shall be suitable for machining or other processes. Sand-cast brass shall not be used. Leaded brass shall be CW614N or CW617N in accordance with EN 12420 and EN 12164. Cold drawn brass rods up to 45 mm w
49、ide in cross-section shall only be used after heat treatment and testing for internal 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 as folds, or surface defects such as a crack which may lead to leakage or component failure. 5.2.2 Springs shall be manufactured from stainless steel in accordance with EN 10270-3 or equivalent standard. Components, when made from stainless steel, shall c
