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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 11114-2:2001 Th
2、e European Standard EN ISO 11114-2:2000 has the status of a British Standard ICS 23.020.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 2: Non-metallic materials Licensed Copy:
3、sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 BSI 03-
4、2001 ISBN 0 580 34864 4 BS EN ISO 11114-2:2001 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN ISO 11114-2:2000. It is identical with ISO 11114-2:2000. The UK participation in its preparation was entruste
5、d by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/1, Valve fittings for gas cylinders, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change,
6、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 subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standa
7、rds normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled Inter
8、national 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 contract. Users of British Standards are responsible for their correct application. Compliance with a Bri
9、tish 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 ISO title page, pages 2 to 23 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issu
10、ed. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11114-2 December 2000 ICS 23.020.30 English version Transportable gas cylinders - Compatibility of cylinder and valve materials with
11、 gas contents - Part 2: Non-metallic materials (ISO 11114-2:2000) Bouteilles gaz transportables - Compatibilit des matriaux des bouteilles et des robinets avec les contenus gazeux - Partie 2: Matriaux non mtalliques (ISO 11114- 2:2000) Ortsbewegliche Gasflaschen - Vertrglichkeit von Werkstoffen fr G
12、asflaschen und Ventile mit den in Berhrung kommenden Gasen - Teil 2: Nichtmetallische Werkstoffe (ISO 11114-2:2000) This European Standard was approved by CEN on 8 April 2000. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eur
13、opean 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 Management Centre or to any CEN member. This European Standard exists in three official versions (English,
14、 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic,
15、Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-
16、1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11114-2:2000 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN ISO 11114-2:2000 Contents Pag
17、e Foreword 3 Introduction 4 1Scope. 5 2Normative references . 5 3Terms and definitions. 5 4Materials 6 5General considerations 7 6Specific considerations 8 7Compatibility data. 11 Annex A (informative) Index of gases 19 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006,
18、Uncontrolled Copy, (c) BSI Page 3 EN ISO 11114-2:2000 Foreword The text of EN ISO 11114-2:2000 has been prepared by Technical Committee CEN/TC 23 “Transportable gas cylinders“, the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 58 “Gas cylinders“. This European
19、 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2001, and conflicting national standards shall be withdrawn at the latest June 2001. According to the CEN/CENELEC Internal Regulations, the national standar
20、ds organizations of the following countries are bound 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
21、 Standard has been submitted for reference into the RID and/or in the technical annexes of the ADR. Therefore in this context the standards listed in the normative references and covering basic requirements of the RID/ADR not addressed within the present standard are normative only when the standard
22、s themselves are referred to in the RID and/or in the technical annexes of the ADR. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN ISO 11114-2:2000 Introduction This Standard is one part of a three-part standard concerning compati
23、bility of gases and gas mixtures with materials : - Part 1 : Metallic materials ; - Part 2 : Non-metallic materials ; - Part 3 : Autogenous ignition test in oxygen atmosphere. This standard deals with the compatibility of non-metallic materials used for gas cylinders and gas cylinder valves with the
24、 gas contents of the cylinder. Compatibility of metallic materials is treated in EN ISO 11114-1. Non-metallic materials are very often used for the construction of gas cylinder valves as seals e.g. O-ring, gland packing, seats, or as lubrication products to avoid friction. They are also commonly use
25、d to ensure sealing of the valve/cylinder connection. For gas cylinders, they are sometimes used as an internal coating or as a liner for composite materials. Non-metallic materials not in contact with the gas are not covered by this standard. Previously, no recognised compilation has existed for no
26、n-metallic cylinder/valve material compatibility with gas contents. This standard therefore presents the current state of the knowledge on the subject. This standard is based on current international experience and knowledge. It does not cover the subject completely and is intended to give guidance
27、only in evaluating the compatibility of gas/material combinations. Some data are derived from experience involving a mixture of the gas concerned with a dilutant, where no data for single component gases were available. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006,
28、Uncontrolled Copy, (c) BSI Page 5 EN ISO 11114-2:2000 1Scope This Standard gives guidance in the selection and evaluation of compatibility between non-metallic materials for gas cylinders and valves and the cylinders gas contents. This standard also covers bundles, tubes and pressure drums. This sta
29、ndard may be helpful for composite and laminated materials. Only the influence of the gas in changing the material and mechanical properties is considered (for example chemical reaction or change in physical state). The basic mechanical properties of the materials required for design purposes are no
30、rmally available from the materials supplier and are not considered in this standard. The compatibility data given are related to single component gases but can be used to some extent for gas mixtures. Ceramics, glasses, and adhesives are not covered by this standard. Aspects such as quality of deli
31、vered gas are not considered. 2Normative references This 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 ame
32、ndments 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 849:1996Transportable gas cylinders - Cylinder valves - Specification and t
33、ype testing EN 1797-1Cryogenic vessels - Gas/material compatibility - Part 1 : Oxygen compatibility EN ISO 11114-1Transportable gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 1 : Metallic materials (ISO 11114-1:1997) ISO 10297Gas cylinders - Refillable gas cyl
34、inder valves - Specification and type testing 3Terms and definitions For the purposes of this Standard the following terms and definitions apply : 3.1 competent person a person who has the necessary technical knowledge, experience and authority to assess and approve materials for use with gases and
35、to define any special conditions of use that are necessary. Such a person will also normally be formally qualified in an appropriate technical discipline Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN ISO 11114-2:2000 3.2 acceptab
36、le a material/gas combination that is satisfactory under normal conditions of use, provided that any indicated non-compatibility risks, as given in Table 1, are taken into account 3.3 not recommended a material/gas combination that may not be safe. Such combinations can be used where they have been
37、assessed and authorized by a competent person who specifies the conditions of use 4Materials 4.1General Non-metallic materials shall be suitable for the intended service. They are suitable if their compatibility is stated as acceptable in Table 1, or the necessary properties have been proved by test
38、s or long and safe experience to the satisfaction of a competent person. In particular cases non-compatible materials may be used if suitably plated or protected. This should only be done if all compatibility aspects have been considered and validated by a competent person. 4.2Types of material The
39、most commonly used non-metallic materials for gas cylinders and cylinder valves can be grouped as follows : - plastics materials ; - elastomer materials ; - fluid lubricants. Materials considered in this standard are : a) Plastics materials - Polytetrafluoroethylene (PTFE) ; - Polychlorotrifluoroeth
40、ylene (PCTFE) ; - Polyvinylidenefluoride (PVDF) ; - Polyamide (PA) ; - Polypropylene (PP). Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN ISO 11114-2:2000 b) Elastomer materials - Butyl rubber (IIR) ; - Nitrile (NBR) ; - Chloropre
41、ne (CR) ; - Chlorofluorocarbons (FKM) ; - Silicone (Q) ; - Ethylene propylene (EPDM). c) Fluid lubricants - Hydrocarbon (HC) ; - Fluorocarbon (FC). 5General considerations It is important to note that these materials are generic types. Within each material type there are variations in the properties
42、 of the materials due to polymer differences and formulations used by manufacturers to modify physical and chemical properties of the material. The user of the material should therefore consult the manufacturer and if necessary carry out tests before using the material (for example for critical serv
43、ices such as oxygen and other highly oxidizing gases). Lubricants are often used in valves to reduce friction and wear in the moving parts. For valves used for oxidizing gases, if lubrication is required and this lubricant is not oxygen compatible, then the lubricated components shall not be in cont
44、act with the gas. Where the lubricant is listed as “not recommended“ in Table 1 for reasons other than violent reaction (F), it may be used safely and usually satisfactorily in applications which do not involve contact in normal operation with the gas. An example of such an application is the lubric
45、ation of the valve actuating mechanism on the side of the valve sealing system open to the atmosphere. Where the lubricant is listed as “not recommended“ for the reason of violent reaction (F), it may not be used in any part of the system that can be contacted by the gas, even under abnormal conditi
46、ons e.g. as in the event of a failure of the gas sealing system. Where the lubricant may not be used, it may be possible to specify suitable and safe alternatives (e.g. PTFE or molybdenum disulfide). Appropriate safety and suitability tests should have been carried out for the lubricant application
47、before it is used. The properties of plastics and elastomers are dependent on temperature. Low temperature can cause hardening and the possibility of embrittlement, whereas high temperature can cause softening and the possibility of material flow. Users of such materials shall check to ensure their
48、suitability over the entire operating temperature range, normally considered to be - 50 C to + 65 C for cylinders and - 20 C to + 65 C for cylinder valves. Some materials become brittle at low temperatures, even temperatures at the lower end of the normal operating range (e.g. chlorofluorocarbons).
49、Temperatures in the refrigerant or cryogenic ranges affect a great many materials and great caution should be exercised at temperatures below - 50 C. This risk shall be considered in particular when transfilling by thermal siphoning at low temperature or similar procedures, or for cylinders regularly filled at low temperatures (e.g. CO2). Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:09:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 8 EN ISO 11114-2:2000 6Specific considerations 6.1General The compatibility of gases with non-metallic mate
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