BRITISH STANDARD Cryogenic vessels — Materials — Part 1: Toughness requirements for temperatures below --80°C ‘The European Standard EN 1252-1:1098 has the status of a Bailish Standard 1827500 H, : BS EN 1252-1:1998etic on 15 Jy 1998 onst88 SH 0580 20711 National foreword ‘This British Standard is the English language version of EN 1252-1:1998 “The UK participation in its preparation was entrusted to ‘Technical Committee PVB/I6, Cryogenic vessels, which has the responsibility to: — aid enquirers to understand the text; _— present to the responsible Buropean comumittee 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 the UK [A list of organizations represented on this committee can be obtained on request to its secretary. Gross-references ‘the BSI Standards Correspondence Index’, or by using the “Find!” facility of the BSI Standards. Electronic Catalogue. ‘A British Standard does not purport to include all the necessary provisions of a ‘of British Standards are responsible for their correct application, Compliance with a British Standard does not of itself confer immunity from legal obligations. ‘contract. Users ‘Summary of pages ‘This document comprises a front cover, an inside front cover, the EN title page, ‘pages 2 to 6, an inside back cover and a back cover. Amendments issued since publication Amd No, Date "Text affectedEUROPEAN STANDARD EN 1252-1 NORME EUROPEENNE EUROPAISCHE NORM ‘March 1998 xszian Deseipto: Pressure vrs, ogee, operating rcurereen's, materials, metals mechanical properties, mechanical stent Serial ‘strength, impact tests, strength, acceptability English version Cryogenic vessels — Materials — Part 1: Toughness requirements for temperatures below --80 °C Rétiplents cryogéniques — Matériaux — ‘KayoBehilter — Werkstoffe— Partie 1: Bxigences de ténacité pour les ‘Teil 1: Anforderungen an die Zihigkeit bei ‘temmpératures inféieures & -80°C ‘Temperaturen unter ~80 °C ‘This Buropean Standard was approved by CEN on 15 February 1998 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-todate lists and bibliographical references conceming such national standards may be obtained on application to the Central Secretaria or to ary CEN member ‘This Buropean Standard exists in three official versions (English, French, German), Aversion in any other language made by translation under the resporsibility 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 Ausra, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom, CEN Buropean Committee for Standardizstion Comité Européen dle Normalisation Buroptisches Komitee fr Nonmamg Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1998 CEN All rights of exploitation in any forma and by any means reserved worldwide for OEN rational Members. Ref. No. BN 12521:1998 &Page 2 EN 1262-1:1998 Foreword ‘This European Standard has been prepared by ‘Technical Committee CAN/TC 268, Cryogenic vessels, ‘the secretariat of which is held by AFNOR ‘This European Standard shall be given the status of 2, national standard, either by publication of an identical September 1098, and conflicting national standards shall be withdrawn at the latest by September 1968. ‘This European Standard has been prepared under 2 mandate given to CEN by the European Commission and the European Free ‘Trade Association, and supports essential requirements of BU Directive(s) For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard. ‘Aceording to the CEN/CENELEC Internal Regulations, ‘the national standards organizations of the following ‘countries are bound to implement this European. ‘Standard: Austzla, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luixembourg, Netherlands, Norway, Portugal, ‘Spain, Sweden, Switzerland and the United Kingdom. ‘This Buropean Standard is composed of the following parts: EN 1252-1, Cryogenic vessels — Materials — Part I: Toughness requirements for temperatures below 80°C. BEEN 125220, Cryogenic vessels — Matertals — Part-2: Mechanical. characteristics for temperatres ‘benoeen ~ 80 °C to —10°C. thie Burapean Standard i in preparation Contents Foreword Introduction 1 Scope 2 Normative references 8 Definition 4 ‘Toughness requirements 41 General 42 Steels 43° Aluminium or aluminium alloys (see EN 485-8:1908) 44 Copper or copper alloys (see EN 1652, EN 1658, prEN 1981, EN 12163) 45. Methods of test 46 Acceptance criteria Annex A (informative) Clauses of this ‘European Standard addressing essertial requirements or other provisions of EU directives Ce eS Seed 2 BS 1908Introduction ‘The use of materials at low 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 stainless 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 ta be considered is the ‘material toughness at low temperature: 1 Scope ‘This European Standard specifies the toughness ‘requirements of metallic materials for use at a temperature below —80 °C to ensure their suitability for cryogenic vessels. ‘This standard isnot applicable to uralloyed steels and cast materials ‘This standard isnot applicable to cryogenic vessels for liquefied natural gas (LNG) 2 Normative references ‘This Buropean Standard inconporates 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 Usted hereafter. For dated references, subsequent amendments to or revisions of any of these Dublications 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. JN 485-3:1905, Aluméntum and aluminium, alloys — Sheet, strip and plate — Part 8: Tolerances om shape and dimensions of kot-olied produc. EN 1652, Copper and copper alloys — Plate, sheet, strip and circles for general purposes EN 1668, Copper and copper alloys — Plate, sheet and circles for boilers, pressure vessels and hot water storage tunis. PrEN 1961, Copper and copper alloys —- Master alloys EN 10028-1:1902, Flat produots made of steels for ‘pressure purposes — Part I: General requtrements. ‘EN 10028-4:1994, Flat products made of steas for pressure purposes ~ Part 4: Nickel alloy steels with Specified tow temperature properties BIEN 1002877, Flat produots made of steels for pressure purposes ~- Part 7: Stainless steels, EN 10045-1, Metallic materials —- Charpy impact. test — Part 1: Test method. EN 12168, Copper and copper alloys—~ Red for ‘general purposes ‘© Bt 1908 Page 3 EN 1252-1:1998 8 Definition For the of this follow he purposes of his standard, the following minimum working temperature the lowest temperature likely to be reached by the vessel or Ly one of the vessel components daring ‘operation 4 Toughness requirements 4.1 General ‘The toughness of the materials 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 specified in the product standard 42 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 I at minimum working temperature Table 1 — Impact energy requirements for steals ar) Tapact energy of parent ‘etal, wolde and heat atfeeted tone af minimum ‘working temperature Hew? «| Tene alloy steel Ni <6%| SH a Tetley steel # a 5% = N= 0% | aosteniic stainless | Bt Ed steels CEN NOTE ‘The values relate to Vath impact tess pieces specified in BN 100d5-1-1990, [NOTE2_ In the ease of austenite stainless steal (ene BN 100287). — only the wold shall bo subjected to the impact tot, ~ for working temperanues below ~196°C, itis sudhetent 1 perform the impact test at ~196°C. NOTE Wicks steels shall mect the requirements of BN 10028-41994 at : 4.3 Aluminium or aluminium alloys (see EN 485-3:1993) ‘Toughness of aluminium and aluminium alloys is inherently high enough at low temperatures to render ‘impact tests unnecessary. 44 Copper or copper alloys (see EN 1652, EN 1658, prEN 1961, EN 12163) ‘Toughness of copper and copper alloys is inherently high enough at low temperatures to render impact energy unnecessary.Page 4 EN 1252-1:1998 4.5 Methods of test 45.1 General ‘The impact energy values specified in 4.2 relate to test pieces measuring 10 mun X 10 mam with a Vnoich, ‘For materials of thiclness less than 10mm but equal to cor greater than 6 mn, test pieces with a cross-section of 10 x emam, where “e” is the thickness of the ‘material, shall be used. If standard test pleces cannot ‘be obtained from the material, reduced section test ‘pieces, with a width equal to the product thickness, 751m or 5mm, may be used as specified in EN 1005-1. A rainimum value of 34 Jem? as specified in 4.2 shall be met. Impact test shall not be carried out on plate of thickness Jess than 5mm or on their welds 4.5.2 Test plece locations for plates ‘The impact test shall be performed on 3 test pieces. Hach test plece shall he taken transverse to the rolling direction and the notch, therefore, parallel to the direction of rolling and perpendicular to the plate surfzce. 4.5.8 Test piece locations for welds and heat aifected zones 4.5.3.1 For thicknesses e< 10 mm ‘The test pieces shall be taken as follows: — tee test pieces from the centre of the weld; — three test pieces from the heat affected zone ‘reated by the weld ‘The notch shall be completely outside the fused zone but be as close as possible twit, ie six tast pieces in totall (see Figure 3) 4.6.3.2. For thicknesses 10mm <@= 20mm “The tast picces 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 pleces in all (see Figure 2) 45.33 For thicknesses ¢> 20mm ‘The test picces shall be taken as follows: at each of the two points indicated in Figure 3, ‘vo sets of three test pieces (one set from the upper ‘surface, one set from the lower surface); fie twelve test peces in total (see Figure 3) 46 Acceptance criteria “The minimum impact energy values specified in this standard and in EN 100284 correspond to the average from three test pleces. One individual value may be Jess than the specified value, but it shall not be less than 70% of the specified value. Ifthe above acceptance ‘original results and the results of the second series tes together, and shall be met siraultaneously: ‘8) 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 less than the specified minimum value. 1f these conditions are not met, the sample shall be rejected and the rest of the bafch shall be subjected to retest, Figure 1 — Test pieces for os 10mm contre of weld heat affected zone © BSI 10085 é Pe EN 1252-1:11 g =a ‘Figure 2 -- Test pieces for 10mm <¢= 20mm Figure 3 — Test pieces for ¢ > 20mm ons 1008Page 6 EN 1252-1:1998 Annex A (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU directives ‘This European Standard has been prepared under mandate given to CEN by the European Commission and the European Free Trade Association and supports ‘essential requirements of EU Directives: Pressure ‘equipment directive 97/29/CE of 29 May 1997, WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling ‘within the scope of this standard. ‘The clauses of this standard given in Table ZA.1 are likely to support requirements of Directives ‘Table ZA.1 — Comparison between PED and ‘this European Standard i FED Content Tarmonized ‘clans He 7 ENGased : ‘Annex! §2.2.80)| impact strength | lansee 4 i and 42 | ‘Annex 97.6 | material Clause 42 characteristics Compliance with the clauses of this standard provides ‘one means of conforming with the specific essential requirements of the Directive concemed and associated EFTA regulations © mst i908‘889 Chiswick High Road WA4AL BSI — British Standards Institution ‘BST is the independent national body responsible for preparing Bultish Standards. 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