1、Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 December 2003, Uncontrolled Copy, (c) BSIBRITISH STANDARD BS EN 1252-1:1998 Incorporating Corrigendum No. 1 Cryogenic vessels Materials Part 1: Toughness requirements for temperatures below p80C The European Standard EN 125
2、2-1:1998 has the status of a British Standard ICS 27.200 Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 December 2003, Uncontrolled Copy, (c) BSIBS EN 1252-1:1998 This British Standard, having been prepared under the direction of the Engineering Sector Board, was publis
3、hed under the authority of the Standards Board and comes into effect on 15 July 1998 BSI 11 September 2003 ISBN 0 580 29711 X National foreword This British Standard is the English language version of EN 1252-1:1998, including Corrigendum December 1998. The UK participation in its preparation was en
4、trusted to Technical Committee PVE/18, Cryogenic vessels, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which
5、 lists normative references to international publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International St
6、andards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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
7、confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in
8、 the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14638 Corr
9、igendum No. 1 11 September 2003 Inserted Annex A Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 December 2003, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1252-1 March 1998 ICS 27.200 Incorporating corrigendum December 1998 Descriptors
10、: Pressure vessels, cryogenics, operating requirements, materials, metals, mechanical properties, mechanical strength, flexural strength, impact tests, strength, acceptability English versions Cryogenic vessels Materials Part 1: Toughness requirements for temperatures below p80C Rcipients cryognique
11、s Matriaux Partie 1: Exigences de tnacit pour les tempratures infrieures p80C Kryo-Behlter Werkstoffe Teil 1: Anforderungen an die Zhigkeit bei Temperaturen unter p80C This European Standard was approved by CEN on 15 February 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regula
12、tions 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 Eur
13、opean 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 nat
14、ional standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisc
15、hes Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1252-1:1998 E Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 Decembe
16、r 2003, Uncontrolled Copy, (c) BSIEN 1252-1:1998 BSI 11 September 2003 2 Foreword This European Standard 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
17、by publication of an identical text or by endorsement, at the latest by September 1998, and conflicting national standards shall be withdrawn at the latest by September 1998. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade
18、Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bou
19、nd to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standard is composed of the following parts: EN 12
20、52-1, Cryogenic vessels Materials Part 1: Toughness requirements for temperatures below p80C. prEN 1252-2 1)Cryogenic vessels Materials Part 2: Mechanical characteristics for temperatures between p80C to p10C. Contents Page Foreword 2 Introduction 3 1S c o p e 3 2 Normative references 3 3 Definition
21、 3 4 Toughness requirements 4 4.1 General 4 4.2 Steels 4 4.3 Aluminium or aluminium alloys (see EN 485-3:1993) 4 4.4 Copper or copper alloys (see EN 1652, EN 1653, prEN 1981, EN 12163) 4 4.5 Methods of test 4 4.6 Acceptance criteria 6 Annex A (informative) A deviations 7 Annex ZA (informative) Claus
22、es of this European Standard addressing essential requirements or other provisions of EU directive 7 1) This European Standard is in preparation. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 December 2003, Uncontrolled Copy, (c) BSIEN 1252-1:1998 BSI 11 September 2003
23、 3 Introduction The use of materials at low temperatures entails special problems which have to be addressed. Consideration has to be given, in particular, to changes in mechanical characteristics, expansion and contraction phenomena and the thermal conduction of the various materials. Austenitic st
24、ainless steel may transform from austenitic to martensitic phase when cooled down; this will lead to dimensional change that needs to be considered during design. However, the most important property to be considered is the material toughness at low temperature. 1 Scope This European Standard specif
25、ies the toughness requirements of metallic materials for use at a temperature below p80C to ensure their suitability for cryogenic vessels. This standard is not applicable to unalloyed steels and cast materials. This standard is not applicable to cryogenic vessels for liquefied natural gas (LNG). 2
26、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 revision
27、s 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. EN 485-3:1993, , Aluminium and aluminium alloys Sheet, strip and plate Part 3: Tolerances on shape a
28、nd dimensions of hot-rolled products. EN 1652, Copper and copper alloys Plate, sheet, strip and circles for general purposes. EN 1653, Copper and copper alloys Plate, sheet and circles for boilers, pressure vessels and hot water storage units. prEN 1981, Copper and copper alloys Master alloys. EN 10
29、028-1:1992, Flat products made of steels for pressure purposes Part 1: General requirements. EN 10028-4:1994, Flat products made of steels for pressure purposes Part 4: Nickel alloy steels with specified low temperature properties. prEN 10028-7, Flat products made of steels for pressure purposes Par
30、t 7: Stainless steels. EN 10045-1, Metallic materials Charpy impact test Part 1: Test method. EN 12163, Copper and copper alloys Rod for general purposes. 3 Definition For the purposes of this standard, the following definition applies: minimum working temperature the lowest temperature likely to be
31、 reached by the vessel or by one of the vessel components during operation Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 December 2003, Uncontrolled Copy, (c) BSIEN 1252-1:1998 4 BSI 11 September 2003 4 Toughness requirements 4.1 General The toughness of the materials
32、used shall be either guaranteed by the material producer or verified by conducting an impact test on the material in accordance with the following requirements. Additionally for welded vessels, impact tests shall be performed as part of welding procedure qualification and production weld tests as sp
33、ecified in the product standard. 4.2 Steels The materials used for the manufacture of the vessels, the welds and the heat affected zone shall meet the minimum impact energy values given in Table 1 at minimum working temperature. Table 1 Impact energy requirements for steels 4.3 Aluminium or aluminiu
34、m alloys (see EN 485-3:1993) Toughness of aluminium and aluminium alloys is inherently high enough at low temperatures to render impact tests unnecessary. 4.4 Copper or copper alloys (see EN 1652, EN 1653, prEN 1981, EN 12163) Toughness of copper and copper alloys is inherently high enough at low te
35、mperatures to render impact energy unnecessary. 4.5 Methods of test 4.5.1 General The impact energy values specified in 4.2 relate to test pieces measuring 10 mm 10 mm with a V-notch. For materials of thickness less than 10 mm but equal to or greater than 5 mm, test pieces with a cross-section of 10
36、 e mm, where e is the thickness of the material, shall be used. If standard test pieces cannot be obtained from the material, reduced section test pieces, with a width equal to the product thickness, 7,5 mm or 5 mm, may be used as specified in EN 10045-1. A minimum value of 34 J/cm 2as specified in
37、4.2 shall be met. Impact test shall not be carried out on plate of thickness less than 5 mm or on their welds. 4.5.2 Test piece locations for plates The impact test shall be performed on 3 test pieces. Each test piece shall be taken transverse to the rolling direction and the notch, therefore, paral
38、lel to the direction of rolling and perpendicular to the plate surface. 4.5.3 Test piece locations for welds and heat affected zones 4.5.3.1 For thicknesses e u 10 mm The test pieces shall be taken as follows: three test pieces from the centre of the weld; three test pieces from the heat affected zo
39、ne created by the weld. The notch shall be completely outside the fused zone but be as close as possible to it; i.e. six test pieces in total (see Figure 1). Material Impact energy of parent metal, welds and heat affected zone at minimum working temperature J/cm 2 or J ferritic alloy steel Ni 5 % 34
40、 27 ferritic alloy steel 5 % u Ni u9% 34 27 austenitic stainless steels CrNi 34 27 NOTE 1 The values relate to V-notch impact test pieces as specified in EN 10045-1:1990. NOTE 2 In the case of austenitic stainless steels (see EN 10028-7): only the weld shall be subjected to the impact test; for work
41、ing temperatures below p196C, it is sufficient to perform the impact test at p196C. NOTE 3 Nickel steels shall meet the requirements of EN 10028-4:1994. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 December 2003, Uncontrolled Copy, (c) BSIEN 1252-1:1998 BSI 11 Septemb
42、er 2003 5 4.5.3.2 For thicknesses 10 mm e u20 mm The test pieces shall be taken as follows: three test pieces from the centre of the weld; three test pieces from the heat affected zone; i.e. six test pieces in all (see Figure 2). centre of weld heat affected zone Figure 1 Test pieces for e u 10 mm c
43、entre of weld heat affected zone Figure 2 Test pieces for 10 mm e u 20 mm Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 08 December 2003, Uncontrolled Copy, (c) BSIEN 1252-1:1998 6 BSI 11 September 2003 4.5.3.3 For thicknesses e 20 mm The test pieces shall be taken as fol
44、lows: at each of the two points indicated in Figure 3, two sets of three test pieces (one set from the upper surface, one set from the lower surface); i.e. twelve test pieces in total (see Figure 3). 4.6 Acceptance criteria The minimum impact energy values specified in this standard and in EN 10028-
45、4 correspond to the average from three test pieces. One individual value may be less than the specified value, but it shall not be less than 70 % of the specified value. If the above requirements are not met, a supplementary series of three test pieces shall be taken from the same sample. The follow
46、ing acceptance criteria shall apply to the original results and the results of the second series of test, together, and shall be met simultaneously: a) the average of the six tests shall be greater than or equal to the minimum specified value; b) a maximum of two of the six individual values may be
47、less than the specified minimum value. If these conditions are not met, the sample shall be rejected and the rest of the batch shall be subjected to re-tests. centre of weld heat affected zone Figure 3 Test pieces for e 2 0m m Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre,
48、 08 December 2003, Uncontrolled Copy, (c) BSIEN 1252-1:1998 BSI 11 September 2003 7 Annex A (informative) A deviations A-deviation: National deviation due to regulations, the alterations of which is for the time being outside the competence of the CEN/CENELEC member. This European standard falls und
49、er Directive 97/23/CE Pressure Equipment Directive of which the transitional period will begin on 1999-11-29 and which will come into force on 2002-05-29. NOTE (from CEN/CENELEC Internal Regulation Part 2: 1994, 3.1.9: Where standards fall under EU Directives, it is the view of the Commission of the European Communities (OJ No C 59, 9.3. 1982) that the effect of the decision of the Court of Justic
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