1、STD-BSI BS EN 1251-1-ENGL 2000 1b24bb9 0848727 773 BRITISH STANDARD Cryogenic vessels - Tiransportable vacuum insulated vessels of not more than 1 O00 litres volume - Part 1: Fundamental requirements The European Standard EN 1251-1:2000 has the status of a British Standard ICs 23.020.10 NO COPYING W
2、ITHOUT BSI PERMISSION EXCEPT AS PERMITED BY COPYRIGHT LAW 3s EN 1251-1:2000 BS EN 1251-1:2000 dirertioii of the Sector Amd.No. Date Conimittee, was pub ished under the aiithonty of the Standards Committee and c oines into effect on 15 May 2000 National foreword Comments This British Standard is the
3、official English language version of EN 1251-1:2OOO. The UK participation in its preparation was entrusted to Technical Committee PVE18, Cryogenic vessels, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the -
4、monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards
5、 which implement international or European publications referred to in thk document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard doe
6、s not purport to include ail the necescary 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 obligations. Summary of pages This document comprises a front cover, an insi
7、de front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. O BSI 05-2000 I I ISBN O 580 32831 7 STDnBSI BS EN L25L-L-ENGL 2000 Lb24669 0848729 546 EUROPEAN STANDARD EN 1251-
8、1 NORME EUROPENNE EUROPISCHE NORM January 2000 ICs 23.020.40 English version Cryogenic vessels - Transportable vacuum insulated vessels of not more than I O00 litres volume - Part 1: Fundamental requirements Rcipients cryogniques - Rdcipients transportables, isols sous vide, dun volume nexcdant pas
9、1 O00 litres - Partie 1: Exigences fondamentales Kryo-Behlter - Ortsbewegliche, Vakuum-isolierte Behlter mit einem Fassungsraum von nicht mehr als 1 O00 Liter - Teil 1 : Grundanforderungen This European Standard was approved by CEN on 19 June 1999. CEN members are bound to comply with the CENiCENELE
10、C 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 concerning sich national standards may be obtained on application to the Central Secretariat or to any CEN
11、 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 own language and notified to the Central Secretariat has the same status as tie official versions. CEN me
12、mbers are the national 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. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NOR
13、MUNG COMITE EUROPEN DE NORMALISATION Central Secretariat: rue de Stassart. 36 B-1050 Brussels O 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1251-1:2000 E STD-BSI BS EN L25L-1-ENGL 2000 - Lb24bb9 0848730 2ba Page 2 EN 1251-
14、1:2000 Contents Foreword 3 I 2 3 4 5 5.1 5.2 5.3 6 7 8 8.1 8.2 8.3 9 io 11 12 Scope . 4 Normative references 4 Definitions . 4 General requirements 7 Mechanical loads . 7 General 7 Load during the pressure test 7 Other mechanical loads . 7 Chemical effects . 8 Thermal conditions 8 Material 8 Materia
15、l properties . 8 Inspection certificate . . 8 Materials for outer jackets and equipment 9 Design. fabrication. inspection and testing 9 Marking and labelling 9 Final acceptance test . 10 Periodic inspection IO O BSI 05-2000 STD-BSI BS EN L25L-L-ENGL 2000 Lb24667 0848733 LT4 m Page 3 EN 1251 -1 :2000
16、 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 by publication of an identical text or by endorsement, at the latest b
17、y July 2000, and conflicting national standards shall be withdrawn at the latest by July 2000. According to the CENKENELEC Internal Regulations, the national standards 0rganize:rons of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, F
18、inland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, 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 normati
19、ve references and covering basic requirements of the RID/ADR not addressed within the present standard are normative only when the standards themselves are referred to in the RID andlor in the technical annexes of the ADR. The other parts of EN 1251 are: - Part 2: Design, fabrication, inspection and
20、 testing; - Part 3: Operational requirements. I O BSI 05-2000 STD.BSI ES EN 1251-1-ENGL 2000 Lh24bh 0848732 030 Page 4 EN 1251 -1 12000 1 Scope This standard specifies the fundamental requirements for transportable vacuum insulated cryogenic vessels of not more than 1 O00 litres volume and designed
21、to operate above atmospheric pressure. Appropriate parts may be used as guidance for vessels designed to operate to the atmosphere. This standard applies to transportable vacuum insulated cryogenic vessels for fluids as specified in 3.1 and is not applicable to such vessels designed for toxic fluids
22、. NOTE “Tiefkalte Behlter” mean reciprocating “cryogenic receptacles” and “Kryo-Behlter” as defined in RID/ADR. For the purposes of this standard, in the English and German versions, “cryogenic vessels” and 2 Normative references This European Standard incorporates by dated or undated references pro
23、visions from other publications. These normative references are cited at appropriate places in the text 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 b
24、y amendment or revision. For undated references the latest edition of the publication referred to applies. EN 1251-2, Cryogenic vessels - Transportable vacuum insulated vessels of not more than 1 O00 litres volume - Part 2: Design, fabrication, inspection and testing EN 1251-3, Cryogenic vessels - T
25、ransportable vacuum insulated vessels of not more than I O00 litres volume - Part 3: Operational requirements EN 1252-1, Cryogenic vessels - Materials - Part 1: Mechanical characteristics for temperature below - 80 “c EN 1626, Cryogenic vessels - Valves for cryogenic service EN 1797-1, Cryogenic ves
26、sels - Gadmaterial compatibility - Pat? I: Oxygen compatibility EN 10204, Metallic products - Types of inspection documents EN 12300, Cryogenic vessels - Cleanliness for cryogenic service 3 Definitions For the purposes of this standard, the following definitions apply. 3.1 cryogenic fluid (refrigera
27、ted liquefied gas) a gas which is partially liquid because of its low temperature”. In the context of all parts of prEN 1251, the (refrigerated but) non-toxic gases given in Table 1 and mixtures of them are referred to as cryogenic fluids ) This includes totally evaporated liquids and supercritical
28、fluids. O BSI 05-2000 - _ STD-BSI BS EN L251-L-ENGL 2000 Lb24bb9 0848733 T77 Page 5 EN 1251 -1 12000 Table 1 : Refrigerated but non-toxic gases lentification number, name and description Asphyxiant gases 1913 Neon, refrigerated liquid 1951 Argon, refrigerated liquid 1963 Helium, refrigerated liquid
29、1970 Krypton, refrigerated liquid 1977 Nitrogen , refrigerated liquid 21 87 2591 Xenon, refrigerated liquid 31 36 Trifluoromethane, refrigerated liquid 31 58 Carbon dioxide, refrigerated liquid Gas, refrigerated liquid, N.O.S.2 Oxidizing gases 1003 Air, refrigerated liquid 1073 Oxygen, refrigerated
30、liquid 2201 Nitrous oxide, refrigerated liquid 331 I Gas, refrigerated liquid, oxidizing, N.O.S.2) Item and group 3” A 3” o 3” F *) N.O.S. = not otherwise specified. _ Flammable gases 1038 Ethylene, refrigerated liquid 1961 Ethane, refrigerated liquid 1966 Hydrogen, refrigerated liquid 1972 Methane,
31、 refrigerated liquid or natural gas, refrigerated liquid, with hig methane content 31 38 Ethylene, acetylene and propylene mixture, refrigerated liquid, containing , least 713 % ethylene with not more than 22,5 % acetylene and not more tha 6 % propylene Gas, refrigerated liquid, flammable, N.0.S.2 3
32、31 2 3.2 transportable cryogenic vessel a thermally insulated vessel intended for the transport of one or more cryogenic fluids, consisting of an inner vessel, an outer jacket, all of the valves and equipment together with any additional framework. This transportable cryogenic vessel represents a co
33、mplete assembly ready for putting into service 3.3 thermal insulation a vacuum interspace between the inner vessel and the outer jacket. The space may or may not be filled with material to reduce the heat transfer between the inner vessel and the outer jacket 3.4 inner vessel the vessel intended to
34、contain the cryogenic fluid i O BSI 05-2000 Page 6 EN 1251-1:2000 3.5 outer jacket the gas-tight enclosure which contains the inner vessel and enables the vacuum to be established 3.6 normal operation the intended operation of the vessel at maximum allowable pressure including the handling loads def
35、ined in 3.7 3.7 handling loads the loads exerted on the transportable cryogenic vessel in all expected situations of transport including loading, unloading, moving by hand or fork lift truck 3.8 documentation technical documents delivered by the manufacturer to the owner consisting of: - all certifi
36、cates establishing the conformity with this standard (e.g. material, pressure test, cleanliness, safety devices); - a short description of the vessel (including characteristic data, etc.); - a list of fluids and their net mass for which the cryogenic vessel is designed; - an operating manual (for th
37、e user) which consists of: I) a short description of the vessel (including characteristic data, etc.); 2) a statement that the vessel is in conformity with this standard; and 3) the instructions for normal operation 3.9 piping system all pipes which can come in contact with cryogenic fluids includin
38、g their valves, fittings, pressure relief devices as well as their supports 3.1 O equipment devices which have a safety related function with respect to pressure containment andior control (e.g. protective or limiting devices, regulating and monitoring devices, valves, indicators) 3.1 1 manufacturer
39、 of the transportable cryogenic vessel the company which carries out the final assembly of the transportable cryogenic vessel 3.12 volume of the inner vessel the volume of the shell, excluding nozzles, pipes, etc., determined at minimum design temperature and atmospheric pressure 3.13 tare mass the
40、mass of the empty transportable cryogenic vessel 3.14 net mass the maximum allowable mass of the cryogenic fluid which may be filled 3.15 gross mass the sum of tare mass plus net mass O BSI 05-2000 STD-BSI BS EN LZSL-L-ENGL 2000 = Lb24bb9 0848735 84T Page 7 EN 1251 -1 :2000 3.16 pressure a pressure
41、relative to atmospheric pressure, .e. gauge pressure. As a consequence, vacuum is designated by a negative value 4 General requirements The transportable cryogenic vessel shall safely withstand the mechanical and thermal loads and the chemical effects encountered during pressure test and normal oper
42、ation. These requirements are deemed to be satisfied if clauses 5 to 9 are fulfilled. The vessel shall be marked in accordance with clause 10, tested in accordance with clauses 11 and 12 and operated in accordance with EN 1251-3. 5 Mechanical loads 5.1 General The transportable cryogenic vessel shal
43、l resist the mechanical loads mentioned in clause 4 without such deformation which could affect safety and which could lead to leakage. This requirement can be validated by: - calculation; - experimental method; - calculation and experimental method in accordance with prEN 1251-2. The mechanical loa
44、ds to be considered are given in 5.2 and 5.3. 5.2 Load during the pressure test The loads exerted during the pressure test are: ft 2 1,3(fs + 1) bar where: Pt is the test pressure (in bar); Ps is the maximum allowable pressure (= relief device set pressure) (in bar); + 1 is the allowance for externa
45、l vacuum (in bar). 5.3 Other mechanical loads 5.3.1 The following loads shall be considered to act in combination where relevant: - a pressure equal to the maximum allowable pressure in the inner vessel and pipework; - the pressure exerted by the liquid when filled to capacity; - loads produced by t
46、he thermal movement of the inner vessel, outer jacket and interspace piping; - loads imposed in lifting and handling fixtures (at the vessel); - full vacuum in the outer jacket; O BSI 05-2000 Page 8 - a pressure in the outer jacket equal to the set pressure of the relief device protecting the outer
47、jacket; EN 1251-1:2000 - load due to dynamic effects, when the vessel is filled to capacity, giving consideration to: - the inner vessel support system including attachments to the inner vessel and outer jacket; - the interspace and external piping; - the outer jacket supports and where applicable t
48、he supporting frame. 5.3.2 capacity shown on the data plate exerted by the inner vessel both horizontally and vertically shall be considered. Dynamic loads during normal operation equal to twice the mass of the inner vessel when filled to the 5.3.3 If the vessel has a volume of more than 100 I or a
49、gross mass of more than 150 kg or if the height of the centre of gravity of the fully loaded vessel is less than twice the smallest horizontal dimension at its base, the vertically upwards acting reference load may be reduced to one times the gross mass. 6 Chemical effects Due to the cryogenic fluids, their temperatures and the materials of construction used, the possibility of chemical action on the inner surfaces in contact with the cryogenic fluids can be neglected. Also due to the fact that the inner vessel is inside an evacuated outer jacket,
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