1、 STD-BSI BS EN 1251-2-ENGL 2000 = Lb24bb9 0848777 279 BRITISH STANDARD Cryogenic vessels - Wansportable vacuum insulated vessels of not more than 1 O00 litres volume - Part 2: Design, fabrication, inspection and testing The European Standard EN 1251-2:2 has the status of a British Standard ICs 23.02
2、0.40 BS EN 1251-2:2000 NO COPYING WTHOUT BSI PERMISSION EXCEPT AS PERMIWED BY COPYRIGHT LAW STDmBSI BS EN IZSI-Z-ENGL direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 2000 Amd. No. BS EN 1261-2:2000 Date Comme
3、nts 2000 D Lb24bb 0848778 235 D National foreword This British Standard is the official English language version of EN 1251-2:2000. The UK participation in its preparation was entnisted to Technical Committee PW18, Cryogenic vessels, which has the responsibiity to: - aid enquirers to understand the
4、text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests donned; - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be
5、obtained on request to its secretary. Cross-references The British Standards which implement intedord or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Fnd faci
6、lity of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obliga
7、tions. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 87 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. o BSI 052000 I l ISBN O 580 32832 5 STD-BSI BS EN 1251-2-ENGL 2000
8、 W Zb24bb9 0848779 O71 W EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1251 -2 January 2000 ICs 23.020.40 English version Cryogenic vessels - Transportable vacuum insulated vessels of not more than 1 O00 litres volume - Part 2: Design, fabrication, inspection and testing Rcipients cyrogbnique
9、s - Rcipients transportables, isols sous vide, dun volume nexcdant pas 1 O00 litres - Partie 2: Conception, fabrication, inspection et essai Kryo-Behlter - Ortsbewegliche, Vakuum-isolierte Behlter mit einem Fassungsraum von nicht mehr als 1 O00 Liter - Teil 2: Bemessung, Herstellung and Prfung This
10、European Standard was approved by CEN on 19 June 1999. CEN members are bound to comply with the CENICENELEC 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
11、concerning sich national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by traislation under the responsibility of a CEN member into its
12、 own language and notified to the Central Secretariat has the same status as tie oficial versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain, S
13、weden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEEN DE NORMALISATION Central Secretariat: rue de Stassart, 36 8-1050 Brussels 6 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
14、 Members. Ref. No. EN 1251-22000 E - STD-BSI BS EN 1251-2-ENGL 2000 D Lb24bb 0848780 893 Page 2 EN 1251 -2:2000 Contents Foreword I . 3 1 3 3.1 3.2 4 4.1 4.2 4.3 4.4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 6 6.1 6.2 6.3 6.4 6.5 Scope . 4 Normative references 4 Definitions and symbols 5 Definitions - 5 Symbols
15、 - 5 Design . 7 Design validation options . 7 Common design requirements . - . 7 Design validation by calculation 12 Design validation by experimental method . 27 Fabrication 59 General 59 Cutting - 59 Cold forming . 59 Hot forming . 60 Welding . .- 63 Non-welded joints 63 Quality . 64 Non-destructi
16、ve testing . 65 Rectification 69 . Manufacturing tolerances . - . 60 Inspection and testing . _. 64 Production control test plates 65 Pressure testing ._ . 69 Annex A (normative) Elastic stress analysis 70 A.l General 70 A.2 Terminology 70 A.3 Limit for longitudinal compressive general membrane stre
17、ss 72 A.4 Stress categories and stress limits for general application 73 AS Specific criteria, stress categories and stress limits for limited application . 74 Annex B (informative) Recommended weld details . 79 B.l Scope -. . 79 8.2 Weld detail . .- . 79 B.3 Oxygen service requirements . 80 Annex C
18、 (normative) Additional requirements for flammable fluids 84 0.1 Scope - 85 D.2 Definitions -. . 85 D.3 Requirements . 85 Bibliography 87 Annex D (normative) Outer jacket relief devices . . 85 Q BSI 05-2000 STDeBSI BS EN 125L-Z-ENGL 2000 Lb24bb9 0848781 72T Page 3 EN 1251 -2:2000 Foreword This Europ
19、ean 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 by publication of an identical text or by endorsement, at the latest by July 2000, and con
20、flicting national standards shall be withdrawn at the latest by July 2000. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germ
21、any, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. The standard has been submitted for reference into the RID and/or in the technical annexes of the ADR. Therefore the standards listed in the normative references and cov
22、ering basic requirements of the RIDIADR not addressed within the present standard are normative only when the standards themselves are referred to in the RID and/or in the technical annexes of the ADR. The other parts of EN 1251 are: - Part 1 : Fundamental requirements; - Part 3: Operational require
23、ments. The standard covers validation of design by calculation or by an experimental method. O BSI 05-2000 Page 4 EN 1251-2:2000 1 Scope This European Standard is applicable to the design, fabrication, inspection and testing of transportable vacuum insulated cryogenic vessels of not more than I 000
24、litres volume and designed for a maximum allowable pressure greater than atmospheric. This standard applies to transportable vacuum insulated cryogenic vesseis for fluids as specified in EN 1251-1 and is not applicable to such vessels designed for toxic fluids. For details of acceptable materials se
25、e clause 8 of EN 1251 -1 Additional requirements for flammable fluids are given in annex C. 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
26、 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. EN 287
27、-1, Approval testing of welders - Fusion welding - Part I: Steels EN 287-2, Approval testing of welders - Fusion welding - Part 2: Aluminium and aluminium alloys EN 288-3, Specification and approval of welding procedures for metallic materials - Part 3: Welding procedure tests for arc welding of ste
28、els EN 288-4, Specification and approval of welding procedures for metallic materials - Part 4: Welding procedure tests for arc welding of aluminium and its alloys EN 288-8, Specification and approval of welding procedures for metallic materials - Part 8: Approval by a pre-production welding test EN
29、 473, Qualification and certification of NDT personnel - General principles EN 729-2, Quality requirements for welding - Fusion welding of metallic materials - Part 2: Comprehensive quality requirements EN 729-3, Quality requirements for welding - Fusion welding of metallic materials - Part 3: Stand
30、ard quality requirements EN 895, Destructive tests on welds in metallic materials - Transverse tensile test EN 91 O, Destructive tests on welds in metallic materials - Bend tests EN 962, Transportable gas cylinders - Valve protection devices caps and valve guards for industrial and medical gas Cylin
31、ders - Design, construction and tests EN 970, Non-destructive examination of fusion welds - Visual examination EN 1251-1, Cryogenic vessels - Transportable vacuum insulated vessels of not more than I O00 litres volume - Patt I: Fundamental requirements EN 1251-3, Cryogenic vessels - Transportable va
32、cuum insulated vessels of not more than I 000 litres volume - Part 3: operational requirements EN 1252-1, Cryogenic vessels - Materials - Part 1: Toughness requirements for temperatures below -80 “C O BSI 05-2000 STD-BSI BS EN L251-2-ENGL 2000 lb24bb9 0848783 5T2 W Page 5 EN 1251-2:2000 EN 141 8, We
33、lding personnel - Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials EN 1435, Non-destructive examination of welds - Radiographic examination of welded joints EN 1626, Cryogenic vessels - Valves for cr
34、yogenic service EN 1708-1, Welding - Basic weld joint details in steel - Part 7: Pressurized components EN 1797-1, Cryogenic vessels - Gadmaterial compatibility - Part 1: Oxygen compatibility EN 10045-1, Metallic materials - Charpy impact test - Part 1: Test method EN 10204, Metallic products - Type
35、s of inspection documents EN 1221 3, Cryogenic vessels - Evaluation methods of thermal insulation performance EN 12300, Cryogenic vessels - Cleanliness for cryogenic service EN 22244: 1992, Packaging - Complete, filled transport packages - Horizontal impact tests (horizontal or inclined plane tests
36、- Pendulum test) (IS0 2244: 7985) prEN IS0 41 26-2, Safefy devices for protection against excessive pressure - Part 2: Bursting disc safety devices (ISO/DIS 4 726-23 996) EN IS0 6520-1, Welding and allied processes - Classification of geometric imperfections in metallic materials - Part 7: Fusion we
37、lding (IS0 6520-1:7998) 3 Definitions and symbols 3.1 Definitions For the purposes of this standard, the following definitions apply in addition to those given in EN 1251-1. 3.1.1 automatic welding welding in which the parameters are automatically controlled. Some of these parameters may be adjusted
38、 to a limited extent, either manually or automatically, during welding to maintain the specified welding conditions 3.1.2 maximum allowable pressure, P, the maximum pressure which may be exerted under normal conditions of use 3.1.3 volume of the inner vessel the volume of the shell, excluding nozzle
39、s, pipes, etc., determined at minimum design temperature and atmospheric pressure 3.2 Symbols For the purposes of this standard, the following symbols apply: C allowance for corrosion, in millimetres di internal diameter of tube or nozzle, in millimetres Q BSI 05-2000 Page 6 EN 1251-2:2000 f narrow
40、side of rectangular or elliptical plate, in millimetres lb n P I Pe PP r S V X A c, D Da Di E I K R S Sk SP Z V U buckling length, in millimetres number design pressure, in bar allowable external pressure limited by elastic buckling, in bar allowable external pressure limited by plastic deformation,
41、 in bar radius, e.g. inside knuckle radius of dished end and cones, in millimetres required wall thickness including allowances, in millimetres actual wall thickness, in millimetres factor indicative of the utilization of the permissible design stress in joints or factor allowing for weakening (deca
42、y-length zone) distance over which governing stress is assumed to act, in millimetres area, in square millimetres design factors shell diameter, in millimetres outside diameter, e.g. of a cylindrical shell, in millimetres internal diameter, e.g. of a cylindrical shell, in millimetres Youngs modulus,
43、 in Newtons per square millimetre moment of inertia of stiffening ring, in miimetres material property used for design, in Newtons per square millimetre radius of curvature, e.g. inside crown radius of dished end, in millimetres safety factor at design pressure safety factor against elastic buckling
44、 at design pressure safety factor against plastic deformation auxiliary value Poissons ratio out of roundness O BSI 05-2000 STD.BSI BS EN 1251-2-ENGL 2000 Lb24hb O48785 375 H Page 7 EN 1251-212000 4 Design 4.1 Design validation options Each type of vessel shall be subject to validation of the design
45、 in accordance with one of the options given in 4.1.1, 4.1.2 or 4.1.3. The manufacturer shall consider the nature of the individual design, particularly the degree of novelty; a method of validation appropriate to that design; and the limitation of that method. 4.1.1 Validation by calculation This o
46、ption requires calculation of all pressure and load bearing components. The pressure part thicknesses of the inner vessel and outer jacket shall not be less than required by 4.3. Additional calculations are required to validate the design for the operating conditions including an allowance for dynam
47、ic loads. 4.1.2 Validation by experimental method This option requires the pressure retaining capacity and structural integrity to be validated by experiment as detailed in 4.4. 4.1.3 Validation by calculation and experimental method This option requires validation of the pressure retaining capacity
48、 by calculation except that the minimum wall thickness requirements of Tables 1 and 2 do not apply. Structural integriity shall be validated by experiment as detailed in 4.4. 4.2 Common design requirements 4.2.1 General The requirements of 4.2.2 to 4.2.7 are applicable to all vessels irrespective of
49、 the design validation option used. In the event of an increase in at least one of the following parameters: - maximum allowable pressure; - density of the densest gas for which the vessel is designed; - maximum tare weight of the inner vessel; - nominal length and/or diameter of the inner shell, or, in the event of any change relative - to the type of material or grade (e.g. stainless steel to aluminium or change of stainless steels grades); - to the fundamental shape; - to the decrease in the minimum mechanical properties of the material be
