1、STD-BSI BS EN L25b7-ENGL 2000 111 lb29bb7 0879355 BRITISH STANDARD Industrial valves - Isolating valves for LNG - Specification for suitability and appropriate verification tests The European Standard EN 125672000 has the status of a British Standard ICs 23.060 O9T BS EN 12567:2000 NO COPYING WITHOU
2、T BSI PERMISSION EXCEPT AS PERMITCED BY COPYRIGm LAW Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD=BSI BS EN 125b7-ENGL 2000 m Lb2YbLS 087Y35b TBb m BS EN 12667:2000 direct
3、ion of the Engineering Amd. No. Date Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 September 2000 National foreword Comments This British Standard is the official English language version of EN 125672000. The UK participation in its prepar
4、ation was entrusted by Technical Committee pSE/7, Valves, to Subcommittee PSE78, Valves for the gas industry, which has the responsibility to: - aid enquirem to understand the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep
5、 the UK interests informed; - monitor related international and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secrem. Cross-references The British Standards which implement intemational or European publi
6、cations 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 “Find” facility of the BSI Standards Electsonic Catalogue. A British Standard does not purport to include ail the necessary prov
7、isions 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 inside front cover, the EN title page, pages 2 to 2
8、4, 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 09-2000 I I ISBN O 580 36423 2 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or netwo
9、rking permitted without license from IHS-,-,- STD-BSI BS EN 125b7-ENGL 2000 Lb24bb7 0879357 712 EUROPEAN STANDARD EN 12567 NORME EUROPENNE EUROPISCHE NORM July 2000 ICs 23.060.01 English version Industrial valves - Isolating valves for LNG - Specification for suitability and appropriate verification
10、 tests Robinetterie industrielle - Robinets de sectionnement pour GNL - Prescriptions daptitude lemploi et vrifications sy rapportant Industriearmaturen - Absperrannaturen fr Flssigerdgas Anforderungen an die Gebrauchstauglichkeit und deren PrOfungen This European Standard was approved by CEN on 25
11、June 2000. CEN members are bound to comply with the CENICENELEC Intemal 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 concerning sich national standards may be obta
12、ined 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 tmslation under the responsibility of a CEN member into its own language and notified to the Central Secret
13、ariat has the same status as he oficial versions. CEN members 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
14、COMMiTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FUR NORMUNG COMIT 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 12567:2000 E Copyright Euro
15、pean Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 2 EN 12567:2000 Contents Page Foreword . 3 1 2 3 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.1 1 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.1
16、 O 5.1 1 5.12 6 7 8 Scope 4 Normative references . - . 4 Terms and definitions . 5 Tests and design requirements - 5 Tests . 5 Consideration of thermal conditions in steady state . 5 Consideration of thermal conditions in transient state . 6 Protection against thermal expansion of LNG 6 Cryogenic ne
17、ck extension .- 6 Sealing devices for stem or shaft 7 Assembly of valve (with the exception of the connection to the pipework) 7 Connections to the pipework . 7 External protection . 8 Pressure retaining metal parts 8 Electro-chemical effects . 8 Functional requirements and tests -9 General . 9 Elec
18、trical continuity 9 Mechanical strength of the shell . 9 Endurance 9 Fire resistance - 9 Seat leak tightness 10 Operability 10 Number of turns 10 Attachment of actuator to the valve 10 Manually operated valve . _. 11 Stems or shafts . 11 Cryogenic product acceptance . .- 11 Marking . 11 Information
19、to be provided by the supplier . 12 Preparation for storage and transportation 12 Annex A (normative) Thermal shock test . 13 Annex B (normative) Endurance tests 14 Annex C (normative) Range of DN for type tests . 19 Annex D (normative) Range of PN and Class for type tests . 20 Annex E (normative) L
20、ow temperature acceptance test . 21 Annex F (normative) Marking for sealing direction . 24 O BSI 09-2000 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD=BSI BS EN L25b7-ENGL
21、2000 = Lb24bb9 0074357 775 = Page 3 EN 12567:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 69, Industrial valves, 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 ide
22、ntical text or by endorsement, at the latest by January 2001, and conflicting national standards shall be withdrawn at the latest by January 2001. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European St
23、andard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Q BSI 09-2000 Copyright European Committee for Standardization Provided by IHS under license wit
24、h CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD=BSI BS EN 125b7-ENGL 2000 M Itb24bb7 08743bO Li07 Page 4 EN 12567:2000 1 Scope This European Standard specifies the general performance requirements of isolating valves (gate valves, globe valves, plug and ba
25、ll valves and butterfly valves) used in the production, storage, transmission (by pipeline, rail, road or sea) of Liquefied Natural Gas (LNG). LNG filling valves for vehicle refuelling systems are excluded from the scope of this standard. DN range from DN 8 to DN 1000. PN range from PN 16 to PN 100.
26、 Class range from Class 150 to Class 900. Temperature range from -1 96 “C to +60 “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 public
27、ations 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 (including ame
28、ndments). EN 19, Industrial Valves - Marking. EN 736-1, Valves - Terminology - Part I: Definition of types of valves. EN 736-2, Valves - Terminology - Part 2: Definition of components of valves. EN 736-3, Valves - Terminology - Part 3: Definition of terms. EN 764, Pressure equipment - Terminology an
29、d symbols - Pressure, temperature and volume EN 1 160, Installations and equipment for liquefied natural gas - General characteristics of liquefied natural gas EN 10045-1, Metallic materials - Charpy impact tests - Part 7: Test method. EN 12308, Installations and equipment for LNG - Suitability test
30、ing of gaskets designed for flanged joints used on LNG piping. EN IS0 521 O, Industrial valves - Multi-turn actuator attachments (IS0 521 0:1997), prEN IS0 521 1 :2000, Industrial valves - Part-turn valve actuator attachments (ISO/FDIS 521 7:2000). prEN 12266-1:1999, industrial valves - Testing of v
31、alves - Part I: Tests, test procedures and acceptance criteria to be fulfilled by every valve. prEN 12516-1:2000, Industrial Valves - Shell Design Strength - Part 7: Tabulation Method for Steel Valves. prEN 12516-2:2000, Industrial Valves - Shell Design Strength - Part 2: Calculation Method for Stee
32、l Valves prEN 12516-3:1999, Valves - Shell design strength - Part 3: Experimental method EN 12570, Industrial valves - Method for sizing the operating element IS0 10497, Testing of valves - Fire type-testing requirements. ASTM A 380, Standard practice to cleaning, descaling and passivation of stainl
33、ess steel parts, equipment and systems. O BSI 09-2000 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 5 EN 12567:2000 3 Terms and definitions For the purposes of this Europe
34、an Standard, the terms and definitions of EN 736-1, EN 736-2, EN 736-3 and EN 764 apply together with the following terms and definitions. 3.1 LNG (liquefied natural gas) see EN 1160 3.2 allowable pressureps see EN 764 3.3 minimum allowable temperature minimum temperature which a valve can permanent
35、ly withstand at pressures equal to or less than the allowable pressurep, (see EN 764) 3.4 operating cycle full motion from closed position to open position and back to closed position 3.5 type test see EN 736-3 3.6 production test see EN 736-3 4 Tests and design requirements 4.1 Tests The requiremen
36、ts for production and type tests shall be as given in Tables 1 to 23. The range of valves approved on the basis of a type test shall be as given in annexes C and D. 4.2 Consideration of thermal conditions in steady state The stress and the strength calculations shall be in accordance with the requir
37、ements of prEN 12516-1:2000, prEN 12516-2:2000 and prEN 12516-3:1999. Q BSI 09-2000 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD*BSI BS EN 125b7-ENGL 2000 Lb24bb7 08743b2
38、28T thermal stresses in transient state occurring during the cool down operation. NOTE Thermal stresses in transient state present the following characteristics: Page 6 EN 12567:2000 4.3 Consideration of thermal conditions in transient state Table 1 Requirement Production test - they are often much
39、larger than static pressure stresses; - they increase with an increase in thickness of the valve body. The general requirements of EN 1160 shall be observed when necessary. The valve design with respect to thermal stresses in transient state shall be accepted provided that the valve passes the therm
40、al shock test. 4.4 Protection against thermal expansion of LNG Table Requirement The valve shall be designed in such a way that LNG cannot be trapped in any cavity, regardless of the position of the obturator, or an internal safety device shall be fitted to prevent the pressure from rising above the
41、pc. Production test Examination of drawings. Under no circumstances shall LNG be allowed to be released to the atmosphere. 4.5 Cryogenic neck extension Table 3 Requirement The valve shall be designed so that the sealing device on the stem or the shaft, and the operating device shall remain above a m
42、inimum temperature ensuring proper operation of the valve. Any icing shall not hinder operation of the valve nor impair the sealing device of the stem or the shaft. Production test No test is required. Type test Thermal shock test defined in annex A (normative). Type test Examination of drawings. Ty
43、pe test I Examination carried out during the endurance strength test defined in annex B (normative). Q BSI 09-2000 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- STD-BSI BS EN
44、L25b7-ENGL 2000 Lb24bbS 08743b3 Llb W Verification that the materials and design 01 the valve are in conformity with those of the valve submitted to the type test. Page 7 EN 12567:2000 4.6 Sealing devices for stem or shaft Table 4 Requirement The sealing device shall be sufficiently distant from the
45、 body to prevent any risk of icing. Production test Examination carried out during the endurance strength test defined in annex B (normative). 4.7 Assembly of valve (with the exception of the connection to the pipework) Table 5 Requirement Ixternal sealing of the valve shall ensure leak tightness ii
46、 my operating position, at both ambient temperature an( ninimum allowable temperature, as well as during coolin! and warming operations. The bolting load shall be determined to take into accoun :he relaxation of bolts occurring during the cooling down. Flange gaskets shall be in accordance with EN 1
47、2308. VOTE The relaxation is due to: - the delay between cooling of the body and cooling c bolting; - the difference in contraction coefficients between thl metal of the body and the metal of the bolts; - thegasket. The flanges shall be designed to withstand: - pressure stresses; - bolting loads nec
48、essary to ensure leak tightness c the joint at both ambient and low temperatures. 4.8 Connections to the pipework Table 6 Production test lerifications that the naterials and design of he valve is in :onformity with those ,f the valve submitted o the type test. Type test Type test The external leak
49、ightness shall be :onfirmed during the rndurance strength est defined in innex B (normative). I Requirement I Production test I Typetest I I Examination of I European Standards. I drawings. I drawings. Flanges and welding ends shall be in accordance with Examination of (B BSI 09-2000 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduct
