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1、BRITISH STANDARD BS EN 13648-2:2002 Cryogenic vessels Safety devices for protection against excessive pressure Part 2: Bursting disc safety devices for cryogenic service The European Standard EN 13648-2:2002 has the status of a British Standard ICS 23.060.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT
2、AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13648-2:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the
3、 authority of the Standards Policy and Strategy Committee on 3 July 2002 BSI 3 July 2002 ISBN 0 580 39973 7 National foreword This British Standard is the official English language version of EN 13648-2:2002. The UK participation in its preparation was entrusted to Technical Committee PVE/18, Cryoge
4、nic vessels, 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 Catalogu
5、e 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 of this publication are respon
6、sible for their 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
7、the UK interests informed; 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 8, an inside back cover and a back cover. The BSI copyright date displayed in
8、 this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13648-2 May 2002 ICS 2
9、3.060.40 English version Cryogenic vessels - Safety devices for protection against excessive pressure - Part 2: Bursting disc safety devices for cryogenic service Rcipients cryogniques - Dispositifs de protection contre les supressions - Partie 2: Dispositif de scurit disque de rupture pour service
10、cryognique Kryo-Behlter - Sicherheitseinrichtungen gegen Druckberschreitung - Teil 2: Berstscheibeneinrichtungen This European Standard was approved by CEN on 5 April 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe
11、an 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 Management Centre or to any CEN member. This European Standard exists in three official versions (English, Fr
12、ench, 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Den
13、mark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 3
14、6 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13648-2:2002 E Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13648-2:2002 (E) 2 Contents page For
15、eword3 1Scope 4 2Normative references 4 3Terms and definitions5 4Requirements.5 4.1General5 4.2Design.5 4.2.1Design temperature .5 4.2.2Coincident temperature.5 4.2.3Sublimating cryogens .6 4.3Materials6 4.3.1General6 4.3.2Metallic materials.6 4.3.3Corrosion resistance.6 4.3.4Oxygen compatibility.6
16、4.3.5Acetylene compatibility.6 4.3.6Non-metallic materials.6 5Production testing .7 5.1Pressure and burst tests.7 5.2Additional tests for bursting disc safety devices with non-replaceable bursting disc assemblies7 5.2.1Leak tests7 5.2.2Visual examination 7 6Cleanliness.7 7Marking .7 8Prevention of s
17、ubstitution 7 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives8 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13648-2:2002 (E) 3 Foreword This document (EN 1
18、3648-2:2002) has been prepared by Technical Committee CEN/TC 268 “Cryogenic vessels“, 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 November 2002, and
19、conflicting national standards shall be withdrawn at the latest by November 2002. 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 Directiv
20、e(s), see informative annex ZA, which is an integral part of this document. This document also supports the objectives of the framework Directives on Transport of Dangerous Goods. This standard has been submitted for reference into the RID and/or the technical annexes of the ADR. This European Stand
21、ard is composed of the following Parts : EN 13648-1, Cryogenic vessels Safety devices for protection against excessive pressure Part 1 : Safety valves for cryogenic service ; EN 13648-2, Cryogenic vessels Safety devices for protection against excessive pressure Part 2 : Bursting discs safety devices
22、 for cryogenic service ; prEN 13648-3, Cryogenic vessels Safety devices for protection against excessive pressure Part 3 : Determination of required discharge - Capacity and sizing. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
23、 bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 2
24、9 09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13648-2:2002 (E) 4 1 Scope This European Standard specifies the requirements for the design, manufacture and testing of bursting disc safety devices for cryogenic service, i.e. for operation with cryogenic fluids below 10 C in addition to oper
25、ation at ambient temperature. It is a requirement of this standard that the bursting disc safety device(s) comply with prEN ISO 4126-2. In the event of different requirements, this standard takes precedence over that standard. This standard is restricted to bursting disc safety devices not exceeding
26、 a size of DN 100 designed to relieve single phase vapours or gases. A bursting disc assembly can be specified, constructed and tested such that it is suitable for use with more than one gas or with mixtures of gases. NOTEThis standard does not provide methods for determining the capacity of burstin
27、g disc safety devices for a particular cryogenic vessel. Such methods are provided in prEN 13648-3. 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 tex
28、t 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 applie
29、s (including amendments). EN 1251-1:2000, Cryogenic vessels Transportable vacuum insulated vessels of not more than 1 000 litres volume Part 1: Fundamental requirements. EN 1252-1:1998, Cryogenic vessels Materials Part 1: Toughness requirements for temperatures below 80 C. EN 1797-1, Cryogenic vesse
30、ls - Gas/material compatibility - Part 1: Oxygen compatibility. EN 12300:1998, Cryogenic vessels - Cleanliness for cryogenic service. EN ISO 6708:1995, Pipework components Definition and selection of DN (nominal size) (ISO 6708:1995). prEN 1252-2, Cryogenic vessels Materials Part 2: Toughness requir
31、ements for temperatures between 80 C and 20 C. EN 13458-1, Cryogenic vessels Static vacuum insulated vessels Part 1: Fundamental requirements. EN 13530-1, Cryogenic vessels Large transportable vacuum insulated vessels Part 1: Fundamental requirements. prEN 13648-3, Cryogenic Vessels Safety devices f
32、or protection against excessive pressure Part 3: Determination of required discharge - Capacity and sizing. prEN ISO 4126-2, Safety devices for protection against excessive pressure - Part 2: Bursting disc safety devices (ISO/FDIS 4126-2:2002). Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29
33、09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13648-2:2002 (E) 5 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply in addition to those given in prEN ISO 4126-2. 3.1 DN (nominal size) alphanumeric designation of size for components
34、 of a pipework system, which is used for reference purposes. It comprises the letters DN followed by a dimensionless whole number which is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections EN ISO 6708:1995 3.2 pressure pressure for which
35、the value is equal to the algebraic difference between the absolute pressure and the atmospheric pressure 3.3 specified minimum temperature lowest temperature for which the bursting disc safety device is specified 3.4 specified maximum temperature highest temperature for which the bursting disc safe
36、ty device is specified 3.5 coincident temperature temperature of the bursting disc associated with a bursting pressure and which is the expected temperature of the bursting disc at the pressure in the emergency situation 3.6 cryogenic fluids fluid defined as cryogenic fluid in EN 1251-1:2000 or prEN
37、 13458-1 or prEN 13530-1 NOTEThis includes totally evaporated liquids and supercritical fluids. 3.7 bursting disc safety device with a non-replaceable bursting disc assembly bursting disc safety device whose bursting disc assembly is permanently joined to the bursting disc holder by the manufacturer
38、 4 Requirements 4.1 General The bursting disc safety device shall satisfy all the requirements of prEN ISO 4126-2 except in event of different requirements, where this standard takes precedence. 4.2 Design 4.2.1 Design temperature The specified minimum temperature shall be equal to the equilibrium t
39、emperature at atmospheric pressure of the coldest fluid to be relieved. The specified maximum temperature shall be + 65 C unless a higher temperature is specified in the purchase order. 4.2.2 Coincident temperature The coincident temperature shall be 20 C unless otherwise specified by the purchase o
40、rder. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13648-2:2002 (E) 6 4.2.3 Sublimating cryogens Where the bursting disc safety device is specified as suitable for service with products that, when vented to atmosphere from a pressure a
41、nywhere between the devices specified maximum and minimum bursting pressures and at a temperature anywhere between the devices specified maximum and minimum temperatures, condense from gas or vapour directly to solid, e.g. CO2 , the design shall be such as to avoid reduction of the discharge area be
42、low that required due to accumulation of solid product. 4.3 Materials NOTEThis clause indicates important material properties for safe use of safety valves (absence of brittleness, gas compatibility, etc.). It does not address all the PED essential requirements relevant to materials (e.g. no recomme
43、nded materials are listed). 4.3.1 General Materials shall be compatible with the process fluid. 4.3.2 Metallic materials Metallic materials shall be in conformance with EN 1252-1:1998 or prEN 1252-2 as appropriate to the specified minimum temperature. The strength of the materials shall be adequate
44、for their duty at the maximum specified temperature. 4.3.3 Corrosion resistance In addition to normal atmospheric corrosive agents associated with industrial atmospheres the environment surrounding cryogenic vessels is characteristically one of persistent low ambient temperatures together with high
45、humidity. Thus particular care must be taken to ensure that the selected materials of the bursting disc, together with any coating, and of the bursting disc safety device are appropriate such that premature failure or any other malfunction cannot occur. Aluminium discs shall be coated with a corrosi
46、on resistant polymer on the atmospheric side only. Some copper alloys are susceptible to stress corrosion cracking, consequently careful consideration shall be given before selection of these materials for components under stress. 4.3.4 Oxygen compatibility If the specified minimum temperature is eq
47、ual to or below the boiling point of air or the bursting disc assembly is intended for service with oxygen or oxidising products, the materials shall be oxygen compatible in accordance with EN 1797-1. 4.3.5 Acetylene compatibility Metallic materials shall contain less than 70 % copper if specified f
48、or use with mixtures containing acetylene. 4.3.6 Non-metallic materials Non-metallic materials are, so far, well established for use for non-integral bursting discs and for seals and gaskets. If such materials are to be used for structural parts, such as the holder, they shall have properties approp
49、riate to the application and at least meet the requirements of 4.3.2. Non-metallic materials shall also : have mechanical properties that will allow the bursting disc safety device to pass the tests defined in clause 5 ; meet the requirements of 4.3.4. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:34:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13648-2:2002 (E) 7 5 Production testing 5.1 Pressure and burst tests They shall be performed in accordance with the requirements of
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