DIN EN ISO 4126-6-2014 Safety devices for protection against excessive pressure - Part 6 Application selection and installation of bursting disc safety devices (ISO 4126-6 2014) Ge.pdf

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1、October 2014 Translation by DIN-Sprachendienst.English price group 19No 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).IC

2、S 13.240!%;sEnglish version EN ISO 4126-6:2014,English translation of DIN EN ISO 4126-6:2014-10Sicherheitseinrichtungen gegen unzulssigen berdruck Teil 6: Berstscheibeneinrichtungen; Anwendung, Auswahl und Einbau (ISO 4126-6:2014);Englische Fassung EN ISO 4126-6:2014,Englische bersetzung von DIN EN

3、ISO 4126-6:2014-10Dispositifs de scurit pour protection contre les pressions excessives Partie 6: Application, slection et installation des dispositifs de sret disque de rupture(ISO 4126-6:2014);Version anglaise EN ISO 4126-6:2014,Traduction anglaise de DIN EN ISO 4126-6:2014-10SupersedesDIN EN ISO

4、4126-6:2004-04www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 47 pages09.14 DIN EN ISO 4126-6:2014-10 2 A comma is used as the decimal marker. Start of application The start of application of this standard is 2014-10-01. National forewo

5、rd This standard includes safety requirements. This document (EN ISO 4126-6:2014) has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure” in collaboration with Technical Committee CEN/TC 69 “Industrial valves” (Secretariat: AFNOR, France). The r

6、esponsible German body involved in its preparation was the DIN-Normenausschuss Armaturen (DIN Standards Committee Valves), Working Committee NA 003-01-10 AA Sicherheitseinrichtungen gegen Druck-berschreitung. The DIN Standards corresponding to the International Standards referred to in this document

7、 are as follows: ISO 4126-1 DIN EN ISO 4126-1 ISO 4126-2 DIN EN ISO 4126-2 ISO 4126-3 DIN EN ISO 4126-3 ISO 4126-4 DIN EN ISO 4126-4 ISO 4126-5 DIN EN ISO 4126-5 ISO 4126-7 DIN EN ISO 4126-7 Amendments This standard differs from DIN EN ISO 4126-6:2004-04 as follows: a) Annex C has been revised to re

8、fer to Part 7 for capacity calculations; b) the former Annex D has been deleted as this information is given in Part 7; c) the former Annex E (now Annex D) has been revised to include a methodology for establishing flow resis-tance values for bursting discs opened in incompressible fluid; d) Annex E

9、 has been added to include existing and additional guidelines for type testing; e) Annex F has been added to include information on bursting disc tolerances and operating parameters. Previous editions DIN EN ISO 4126-6: 2004-04 DIN EN ISO 4126-6:2014-10 3 National Annex NA (informative) Bibliography

10、 DIN EN ISO 4126-1, Safety devices for protection against excessive pressure Part 1: Safety valves DIN EN ISO 4126-2, Safety devices for protection against excessive pressure Part 2: Bursting disc safety devices DIN EN ISO 4126-3 Safety devices for protection against excessive pressure Part 3: Safet

11、y valves and bursting disc safety devices in combination DIN EN ISO 4126-4, Safety devices for protection against excessive pressure Part 4: Pilot operated safety valves DIN EN ISO 4126-5, Safety devices for protection against excessive pressure Part 5: Controlled safety pressure relief systems (CSP

12、RS) DIN EN ISO 4126-7 Safety devices for protection against excessive pressure Part 7: Common data DIN EN ISO 4126-6:2014-10 4 This page is intentionally blank EN ISO 4126-6June 2014 ICS 13.240 Supersedes EN ISO 4126-6:2003English VersionSafety devices for protection against excessive pressure -Part

13、 6: Application, selection and installation of bursting disc safetydevices (ISO 4126-6:2014)Dispositifs de scurit pour protection contre les pressionsexcessives - Partie 6: Application, slection et installationdes dispositifs de sret disque de rupture(ISO 4126-6:2014)Sicherheitseinrichtungen gegen u

14、nzulssigen berdruck - Teil 6: Berstscheibeneinrichtungen; Anwendung, Auswahl und Einbau (ISO 4126-6:2014) This European Standard was approved by CEN on 22 May 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Stand

15、ard 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 versions (English

16、, 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, Belgium, Bul

17、garia, 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, Switzerland, T

18、urkey andUnited Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, 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 ISO 4126-6:2014 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUR

19、OPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORM2Contents Page Foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references. 5 3 Terms and definitions 5 4 Symbols and units . 9 5 Application 10 6 Selection . 12 6.1 Selection of bursting disc safety devices . 12 6.2 Sele

20、ction of the performance tolerance. 14 7 Installation 16 7.1 General 16 7.2 Location of bursting disc safety devices 16 7.3 Installation of bursting disc safety devices 16 Annex A (informative) Information to be supplied by the purchaser . 18 Annex B (informative) Guidelines for determining the repl

21、acement period of a bursting disc . 20 Annex C (informative) Pressure relief system discharge capacity . 22 Annex D (informative) Flow testing of bursting disc safety devices 25 Annex E (informative) Type testing of non-reclosing bursting disc safety devices . 39 Annex F (informative) Performance ch

22、aracteristics of bursting disc safety devices . 41 Bibliography 43 DIN EN ISO 4126-6:2014-10 EN ISO 4126-6:2014 (E) ForewordThis document (EN ISO 4126-6:2014) has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure” in collaboration with Technica

23、l Committee CEN/TC 69 “Industrial valves” the secretariat of which is held by AFNOR. 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 December 2014, and conflicting national standards shall be with

24、drawn at the latest by December 2014. 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 ISO 4126-6:2003. Acc

25、ording to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, German

26、y, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4126-6:2014 has been approved by CEN as EN ISO 4126-6:2

27、014 without any modification. 1) In development.N1) National footnote: Published as an ISO Standard.EN ISO 4126 consists of the following parts, under the general title Safety devices for protection against excessive pressure: Part 1: Safety valves Part 2: Bursting disc safety devices Part 3: Safety

28、 valves and bursting disc safety devices in combination Part 4: Pilot operated safety valves Part 5: Controlled safety pressure relief systems (CSPRS) Part 6: Application, selection and installation of bursting disc safety devices Part 7: Common data Part 9: Application and installation of safety de

29、vices excluding stand-alone bursting disc safety devicesN1) Part 10: Sizing of safety valves for gas/liquid two-phase flow Part 11: Performance testing1)Part 7 contains data, which is common to more than one of the parts of ISO 4126 to avoid unnecessary repetition. 3DIN EN ISO 4126-6:2014-10EN ISO 4

30、126-6:2014 (E)IntroductionSafety devices for the protection of pressure equipment against excessive pressure include pressure relief devices such as safety valves and bursting disc safety devices which, dependent upon the application, may be used either as the sole pressure relieving devices or in c

31、onjunction with each other.Operating problems frequently arise due to the use of pressure relieving devices not having been properly selected for the intended service or properly selected but whose performance is adversely affected by improper handling, wrong installation or lack of maintenance, any

32、 of which may affect the safety of the pressure equipment being protected.It is important to consider not only the pressure relief devices but also the whole of the pressure relief system so as not to reduce the relieving capacity below that required or adversely affect the proper operation of the p

33、ressure relieving devices.A bursting disc safety device is a non-reclosing pressure relief device which typically comprises a bursting disc, which is a pressure-containing and pressure-sensitive part designed to open by bursting at a predetermined pressure, and a bursting disc holder. There are many

34、 different types of bursting disc safety devices manufactured in corrosion resistant materials, both metallic and non-metallic, to cover a wide range of nominal sizes, burst pressures and temperatures. They are used to protect pressure equipment such as vessels, piping, gas cylinders or other enclos

35、ures from excessive pressure and/or excessive vacuum.This standard covers the important considerations necessary in the application, selection and installation of bursting disc safety devices to give the required protection against excessive pressure and/or excessive vacuum.4DIN EN ISO 4126-6:2014-1

36、0 EN ISO 4126-6:2014 (E) 1 ScopeThis International standard gives guidance on the application, selection and installation of bursting disc safety devices used to protect pressure equipment from excessive pressure and/or excessive vacuum.Annex A provides a checklist for the information to be supplied

37、 by the purchaser to the manufacturer.Annex B gives guidance on the replacement period of a bursting disc.Annex C provides guidance for determining the discharge capacity, for single phase fluids, of a pressure relief system that contains a bursting disc safety device.Annex D is a non-mandatory proc

38、edure for establishing the flow resistance of a burst bursting disc assembly.Annex E is a non-mandatory procedure for type testing of bursting disc safety devices.Annex F provides typical performance characteristics for various bursting disc safety device types.The requirements for the manufacture,

39、inspection, testing, marking, certification and packaging of bursting disc safety devices are given in ISO 4126-2.2 Normative referencesThe following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references

40、, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 4126-2, Safety devices for protection against excessive pressure Part 2: Bursting disc safety devicesISO 4126-3, Safety devices for protection against excess

41、ive pressure Part 3: Safety valves and bursting disc safety devices in combination3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 4126-2 and the following apply.3.1bursting disc safety devicenon-reclosing pressure relief device actuated by differentia

42、l pressure and designed to function by the bursting of the bursting disc(s), and which is the complete assembly of installed components including, where appropriate, the bursting disc holder3.2bursting disc assemblycomplete assembly of components, which are installed in the bursting disc holder to p

43、erform the desired function5DIN EN ISO 4126-6:2014-10EN ISO 4126-6:2014 (E)3.3bursting discpressure-containing and pressure-sensitive component of a bursting disc safety device3.4bursting disc holderthat part of a bursting disc safety device, which retains the bursting disc assembly in position3.5co

44、nventional domed bursting disc (also referred to as, forward acting)bursting disc which is domed in the direction of the bursting pressure (i.e. where the bursting pressure is applied to the concave side of the bursting discNote 1 to entry: See ISO 4126-2:2003, Figure 1).3.6slotted lined bursting di

45、scbursting disc made up of two or more layers, at least one of which is slit or slotted to control the bursting pressure of the bursting disc3.7reverse domed bursting disc (also referred to as, reverse acting)bursting disc which is domed against the direction of the bursting pressure (i.e. where the

46、 bursting pressure is applied to the convex side of the bursting discNote 1 to entry: See ISO 4126-2:2003, Figure 2).3.8flat bursting discbursting disc having one or more layers which is flat when installed. It may be made of a ductile or brittle material3.9graphite bursting discbursting disc manufa

47、ctured from graphite, impregnated graphite, flexible graphite or graphite composite and designed to burst due to bending or shearing forces3.10specified bursting pressurebursting pressure quoted with a coincident temperature when defining the bursting disc requirements (used in conjunction with a pe

48、rformance tolerance, see 3.14)3.11specified maximum bursting pressuremaximum bursting pressure quoted with the coincident temperature when defining the bursting disc requirements (used in conjunction with specified minimum bursting pressure, see 3.12)3.12specified minimum bursting pressureminimum bu

49、rsting pressure quoted with the coincident temperature when defining the bursting disc requirements (used in conjunction with specified maximum bursting pressure, see 3.11)3.13coincident temperaturetemperature of the bursting disc associated with a bursting pressure (see 3.10, 3.11 and 3.12) and which is the expected temperature of the bursting disc when it is required to burst6DIN EN ISO 4126-6:2014-10 EN ISO 4126-6:2014 (E) 3.14perform