BS EN 14129-2004 液化石油汽(LGP)罐压力调节阀 Pressure relief valves for LPG tanks.pdf

BRITISH STANDARD BS EN 141292004 Pressure relief valves for LPG tanks The European Standard EN 141292004 has the status of a British Standard ICS 23.060.40 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Wed Oct 18 232207 GMT0000 2006, Uncontrolled Copy, c BSI BS EN 141292004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 17 November 2004 BSI 17 November 2004 ISBN 0 580 44774 X National foreword This British Standard is the official English language version of EN 141292004. 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-references The British Standards 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 publication 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/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests ined; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Wed Oct 18 232207 GMT0000 2006, Uncontrolled Copy, c BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14129 October 2004 ICS 23.060.40 English version Pressure relief valves for LPG tanks Soupapes de sret pour rservoirs de GPLSicherheitsventile fr Flssiggas-Behlter This European Standard was approved by CEN on 23 August 2004. CEN members 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 to the Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any and by any means reserved worldwide for CEN national Members. Ref. No. EN 141292004 E Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Wed Oct 18 232207 GMT0000 2006, Uncontrolled Copy, c BSI EN 141292004 E 2 Contents Page Foreword..............................................................................................................................................................3 1 Scope ......................................................................................................................................................4 2 Normative references............................................................................................................................4 3 Terms and definitions ...........................................................................................................................5 4 Operating conditions.............................................................................................................................8 5 Materials .................................................................................................................................................8 5.1 General....................................................................................................................................................8 5.2 Metallic materials...................................................................................................................................9 5.3 Non-metallic components.....................................................................................................................9 5.4 Lubricants, sealants, and adhesives...................................................................................................9 5.5 Certification............................................................................................................................................9 6 Design...................................................................................................................................................10 6.1 Introduction..........................................................................................................................................10 6.2 Design parameters...............................................................................................................................10 6.3 Threads.................................................................................................................................................10 6.4 Springs..................................................................................................................................................11 6.5 Other requirements..............................................................................................................................11 6.6 Pressure relief valve with parallel thread..........................................................................................11 7 Testing of the design...........................................................................................................................12 7.1 General..................................................................................................................................................12 7.2 Hydraulic proof test.............................................................................................................................12 7.3 Overtorquing test.................................................................................................................................12 7.4 Operating and flow characteristics....................................................................................................13 7.4.1 General..................................................................................................................................................13 7.4.2 Operation test.......................................................................................................................................13 7.4.3 Flow characteristics test.....................................................................................................................13 7.4.4 Reseal pressure...................................................................................................................................13 7.4.5 Blowdown.............................................................................................................................................13 8 Marking.................................................................................................................................................14 8.1 Pressure relief valves..........................................................................................................................14 8.2 Thermal expansion valves..................................................................................................................14 9 Operating instructions ........................................................................................................................14 Annex A Inative Terms used with LPG pressure relief valves .........................................................16 Annex B Normative Special low temperature requirements for valves...................................................17 Annex ZA inative Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC............................................................................................18 Bibliography......................................................................................................................................................19 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Wed Oct 18 232207 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 141292004 E 3 Foreword This document EN 141292004 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 publication of an identical text or by endorsement, at the latest by April 2005, and conflicting national standards shall be withdrawn at the latest by April 2005. 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 97/23/EC. For relationship with EU Directive, see inative annex ZA, which is an integral part of this document. This European Standard has been ted for reference into the technical anns of the European Agreement concerning the international carriage of dangerous goods by road ADR. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Wed Oct 18 232207 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 141292004 E 4 1 Scope This document specifies the requirements for the design and testing of spring loaded pressure relief valves and thermal expansion valves for use in  static LPG tanks, NOTE The tanks can be situated above ground, underground or mounded.  LPG tanks on road tankers, rail tankers, tank-containers or demountable tanks. 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, manifolds and vent pipes are specified in prEN 14071. prEN 14570 identifies the requirements for the pressure relief valve capacities for static tanks. See EN 12252 for road tankers. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment. EN 1092-1, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1 Steel flanges. EN 1503-1, Valves - Materials for bodies, bonnets and covers - Part 1 Steels specified in European Standards. EN 1503-2, Valves - Materials for bodies, bonnets and covers - Part 2 Steels other than those specified in European Standards. EN 1503-3, Valves - Materials for bodies, bonnets and covers - Part 3Cast irons specified in European Standards. EN 1503-4, Valves - Materials for bodies, bonnets and covers - Part 4Copper alloys specified in European Standards. EN 1563, Founding – Spheroidal graphite cast irons. EN 10088-1, Stainless steels - Part 1 List of stainless steels EN 10088-3, Stainless steels - Part 3 Technical delivery conditions for semi-finished products, bars, rods andsections for general purposes EN 102042004, Metallic products Type of inspection documents. EN 12165, Copper and copper alloys - Wrought and unwrought forging stock Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Wed Oct 18 232207 GMT0000 2006, Uncontrolled Copy, c BSI w w w . b z f x w . c o m EN 141292004 E 5 EN 12420, Copper and copper alloy – Forgings. EN 13906 all parts, Cylindrical helical springs made from round wire and bar –Calculation and design prEN 14071, Pressure relief valves for LPG tanks – Ancillary equipment ISO 7-1, Pipe threads where pressure-tight joints are made on the threads -- Part 1 Dimensions, tolerances and designation. ANSI/ASME B1.20.1 – 1983, Pipe threads, general purpose inch issued by American National Standards Institute on 1983. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 pressure relief valve 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 3.2 thermal expansion valve self-closing valve which automatically, without the assistance of any energy other than that of the fluid concerned, discharges fluid at a predetermined pressure 3.3 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 3.4 external pressure relief valve pressure relief valve which when fitted to the LPG tank has the spring external to the pressure envelope see figure 1 Figure 1 External pressure relief valve 3.5 internal pressure relief valve pressure relief valve which when fitted to the LPG tank has