EN 13953:2003+A1:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssiggas-Geräte und Ausrüstungsteile - Sicherheitsventile für ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG)Equipements pour gaz de pétrole liquéfié et leurs accessoires - Soupapes de sureté des bouteilles transportables et rechargeables pour gaz de pétrole liquéfié (GPL)LPG equipment and accessories - Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas (LPG)23.060.40Pressure regulators23.020.30MHNOHQNHPressure vessels, gas cylindersICS:Ta slovenski standard je istoveten z:EN 13953:2003+A1:2007SIST EN 13953:2003+A1:2007en,fr,de01-september-2007SIST EN 13953:2003+A1:2007SLOVENSKI
STANDARDSIST EN 13953:20031DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13953:2003+A1
March 2007 ICS 23.060.40 SupersedesEN 13953:2003English Version
LPG equipment and accessories - Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas (LPG)
Equipements pour gaz de pétrole liquéfié et leurs accessoires - Soupapes de sûreté des bouteilles transportables et rechargeables pour gaz de pétrole liquéfié (GPL)
Flüssiggas-Geräte und Ausrüstungsteile - Sicherheitsventile für ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG) This European Standard was approved by CEN on 21 April 2003 and includes Amendment 1, approved by CEN on 15 February 2007.
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 CEN 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13953:2003+A1:2007: ESIST EN 13953:2003+A1:2007

Terms used with pressure relief valves.11 Annex B (normative)
Special low temperature requirements for valves.12 Annex C (informative)
Sizing of pressure relief valves for LPG cylinders.13 Annex D (informative)
Production testing.14 D.1 General.14 D.2 Dimensional inspection.14 D.3 Setting and leak testing of pressure relief valves.14 Bibliography.15
1 Scope This European Standard specifies the design, testing and marking requirements for spring loaded pressure relief valves, 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 similar level of safety. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment EN 751 (all parts), Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water EN 837-1, Pressure gauges – Part 1: Bourdon tube pressure gauges - Dimensions, metrology, requirements and testing EN 1563, Founding – Spheroidal graphite cast irons 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 13906-1, Cylindrical helical springs made from round wire and bar – Calculation and design – Part 1: Compression springs 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply: 3.1.1 LPG mixture of light hydrocarbons, gaseous under standard atmospheric conditions, which can be liquefied by increased pressure or decreased temperature. The main components are propane, propene, butane and butene isomers 3.1.2 pressure relief valve valve which automatically, without the assistance of any energy other than that of the fluid concerned, discharges a quantity of fluid so as to prevent a predetermined safe pressure being exceeded, and which is designed to re-close and prevent the further flow of fluid after normal pressure conditions of service have been restored. The loading due to the fluid pressure underneath the valve-sealing element is opposed by a spring SIST EN 13953:2003+A1:2007

3.1.3.5 re-seat pressure inlet pressure at which the sealing element effects a seal with the valve seat after the valve has been subjected to pop action 3.1.3.6 flow rating pressure inlet pressure at which the discharge capacity is measured
3.1.4 nominal discharge capacity minimum discharge capacity at the flow rating pressure expressed in cubic metres per minute of free air at STP rounded down to one decimal place 3.1.5 discharge capacity capacity at the flow rating pressure of a pressure relief valve expressed in cubic metres per minute of free air at STP
3.1.6 sealing element non-metallic resilient component which effects the seal by contact with the pressure relief valve seat 3.1.7 valve seat normally raised area of the pressure relief valve body on to which the sealing element effects a seal 3.1.8 cylinder valve valve fitted to transportable refillable LPG cylinders from 0,5 l up to 150 l water capacity intended to convey LPG only 3.1.9 leak tightness resistance to leakage to atmosphere across the valve seat or any other pressure containing component when the valve is closed SIST EN 13953:2003+A1:2007

Standard Temperature and Pressure [15,6 °C (288,7 K), 1,013 bar absolute (0,1013 MPa absolute)] 4 Operating temperatures Valves designed in accordance with this European Standard shall be suitable for:  a minimum operating temperature of - 20 °C in service. Temperatures below this are acceptable for short periods for example, when filling;  a minimum operating temperature of - 40 °C for those parts of Europe where valves 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;  a maximum operating temperature of 60 °C. Temperatures above this are acceptable for short periods. 5 Materials 5.1 General 5.1.1 Materials in contact with LPG shall be physically and chemically compat
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