BS EN ISO 11114-4-2005移动气瓶.气瓶和瓶阀材料与盛装气体的相容性.第4部分选择耐氢脆的金属材料的试验方法.pdf

BRITISH STANDARD BS EN ISO 11114-42005 Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 4 Test s for selecting metallic materials resistant to hydrogen embrittlement The European Standard EN ISO 11114-42005 has the status of a British Standard ICS 23.020.30 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI BS EN ISO 11114-42005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007 ISBN 978 0 580 50518 8 National foreword This British Standard was published by BSI. It is the UK implementation of EN ISO 11114-42005. The UK participation in its preparation was entrusted by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/1, Valve fittings for gas containers. A list of organizations represented on PVE/3/1 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11114-4 August 2005 ICS 23.020.30 English Version Transportable gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 4 Test s for selecting metallic materials resistant to hydrogen embrittlement ISO 11114-42005 Bouteilles gaz transportables - Compatibilit des matriaux des bouteilles et des robinets avec les contenus gazeux - Partie 4 Mthodes dessai pour le choix de matriaux mtalliques rsistants la fragilisation par lhydrogne ISO 11114-42005 Ortsbewegliche Gasflaschen - Vertrglichkeit von Werkstoffen fr Gasflaschen und Ventile mit den in Berhrung kommenden Gasen - Teil 4 Prfverfahren zur Auswahl von metallischen Werkstoffen, die gegen Wasserstoffversprdung unempfindlich sind ISO 11114- 42005 This European Standard was approved by CEN on 22 July 2005. 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-to-date lists and bibliographical references concerning such 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 translation under the responsibility 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 Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, 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-1050 Brussels 2005 CENAll rights of exploitation in any and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11114-42005 E Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI Foreword This document EN ISO 11114-42005 has been prepared by Technical Committee ISO/TC 58 “Gas cylinders“ in collaboration with Technical Committee CEN/TC 23 “Transportable gas cylinders“, the secretariat of which is held by BSI. 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 February 2006, and conflicting national standards shall be withdrawn at the latest by February 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 11114-42005 has been approved by CEN as EN ISO 11114-42005 without any modifications, except as stated in normative annex NA. NOTE Normative references to International Standards are listed in Annex ZA normative. EN ISO 11114-42005 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI Reference number ISO 11114-42005E INTERNATIONAL STANDARD ISO 11114-4 First edition 2005-08-01 Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 4 Test s for selecting metallic materials resistant to hydrogen embrittlement Bouteilles gaz transportables Compatibilit des matriaux des bouteilles et des robinets avec les contenus gazeux Partie 4 Mthodes dessai pour le choix de matriaux mtalliques rsistants la fragilisation par lhydrogne EN ISO 11114-42005 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI ii Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI iii Contents Page Foreword............................................................................................................................................................ iv Introduction........................................................................................................................................................ v 1 Scope ..................................................................................................................................................... 1 2 Normative references........................................................................................................................... 1 3 Terms, definitions and symbols.......................................................................................................... 2 3.1 Terms and definitions........................................................................................................................... 2 3.2 Symbols................................................................................................................................................. 3 4 General requirements........................................................................................................................... 3 5 Test s......................................................................................................................................... 4 5.1 Disc test A............................................................................................................................. 4 5.2 Fracture mechanic test B .................................................................................................... 9 5.3 Test to determine the resistance to hydrogen assisted cracking of steel cylinders C........................................................................................................................................... 13 5.4 Tensile tests ........................................................................................................................................ 16 EN ISO 11114-42005 Annex ZA normative Normative references to international publications with their relevant Annex NA normative Specific European requirements..............................................................................17 European publications........................................................................................................................18 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI iv Foreword ISO the International Organization for Standardization is a worldwide federation of national standards bodies ISO member bodies. The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission IEC on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 11114-4 was prepared by Technical Committee ISO/TC 58, Gas cylinders. ISO 11114 consists of the following parts, under the general title Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents ⎯ Part 1 Metallic materials ⎯ Part 2 Non-metallic materials ⎯ Part 3 Autogenous ignition test in oxygen atmosphere ⎯ Part 4 Test s for selecting metallic materials resistant to hydrogen embrittlement EN ISO 11114-42005 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI v Introduction It is widely recognised that compressed hydrogen and some hydrogen bearing gases can have an embrittling effect on metallic materials, especially steels. This embrittling effect has resulted in the failure of hydrogen cylinders including some bursts that has led gas cylinder users and manufacturers to adopt specific measures. The adoption of these measures has eliminated all known failures of hydrogen cylinders from this embrittlement phenomenon. The basic recommendation was to minimise the stresses in the cylinder wall see ISO 11114-1 and eliminate harmful defects. This tensile strength limit of 950 MPa was developed for quenched and tempered gas cylinders of 34 Cr Mo 4 type steels using steelmaking practices, chemistry and manufacturing techniques typical of those used during the early 1980s and successfully used for filling pressures up to 300 bar. This practice has been in widescale use up to the current time. Other higher pressures, although at lower tensile strength limits, have also been used. In recent years, improvements in steelmaking, e.g. by reducing the sulphur and phosphorus contents, have indicated the possibility of increasing the tensile strength limit of 950 MPa for embrittling gas service, as a result of improvements in the fracture toughness of the material. Experimental work has shown that the relevant parameters affecting hydrogen embrittlement are the following a microstructure resulting from the combination of the chemistry and the heat treatment; b mechanical properties of the material; c applied wall stress; d internal surface imperfections resulting in local stress concentrations; e characteristics of the gas contained composition, quality, pressure, etc.. When developing this part of ISO 11114 only the material aspects, a and b above, were considered. Other essential features, c and d, are covered by the relevant parts of ISO 9809. This part of ISO 11114 specifies test s to identify steels which, when combined with the cylinder manufacturing requirements specified in ISO 9809 all parts, will result in cylinders suitable for use in embrittling gas service. However, some low alloy steels other than 34 Cr Mo 4 may require tensile strength lower than 950 MPa to be suitable for the manufacture of gas cylinders for embrittling gas service. These tests have been developed following an extensive world-wide programme which incorporated laboratory and full scale tests. EN ISO 11114-42005 Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI blank Licensed Copy Institute Of Technology Tallaght, Institute of Technology, Mon Apr 16 103821 GMT0000 2007, Uncontrolled Copy, c BSI 1 Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 4 Test s for selecting metallic materials resistant to hydrogen embrittlement 1 Scope This part of ISO 11114 specifies test s and the uation of results from these tests in order to qualify steels suitable for use in the manufacture of gas cylinders up to 3 000 l for hydrogen and other embrittling gases. This part of ISO 11114 only applies to seamless steel gas cylinders. The requirements of this part of ISO 11114 are not applicable if at least one of the following conditions for the intended gas service is fulfilled 1 ⎯ the working pressure of the filled embrittling gas is less than 20 of the test pressure of the cylinder; ⎯ the partial pressure of the filled embrittling gas of a gas mixture is less than 5 MPa 50 bar in the case of hydrogen and other embrittling gases, with the exception of hydrogen sulphide and methyl mercaptan in which cases the partial pressure shall not exceed 0,25 MPa 2,5 bar. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. ISO 4287, Geometrical product specifications GPS Surface texture Profile Terms, definitions and surface texture parameters ISO 7539-11987, Corrosion of metals and alloys Stress corrosion testing Part 1 General guidance on testing procedures ISO 7539-62003, Corrosion of metals and alloys Stress corrosion testing Part 6 Preparation and use of pre-cracked s