1、BS ISO 4706:2008ICS 23.020.30,NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDGas cylinders Refillable weldedsteel cylinders Testpressure 60 bar andbelowThis British Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30Novem
2、ber 2008 BSI 2008ISBN 978 0 580 53594 9Amendments/corrigenda issued since publicationDate CommentsBS ISO 4706:2008National forewordThis British Standard is the UK implementation of ISO 4706:2008.The UK participation in its preparation was entrusted to TechnicalCommittee PVE/3/3, Transportable gas co
3、ntainers - Cylinder design,construction and testing at the time of manufacture.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correc
4、t application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 4706:2008Reference numberISO 4706:2008(E)ISO 2008INTERNATIONAL STANDARD ISO4706First edition2008-04-15Corrected version2008-07-01Gas cylinders Refillable welded steel cylinders Test pressure 60 bar a
5、nd below Bouteilles gaz Bouteilles en acier soudes rechargeables Pression dessai de 60 bar et moins BS ISO 4706:2008ISO 4706:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unl
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8、n the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
9、 electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrigh
10、tiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedBS ISO 4706:2008ISO 4706:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms, definitions and symbols 2 4 Inspection and testing 4 5 Materials
11、4 6 Design 5 7 Calculation of minimum wall thickness (sidewall and ends) . 6 8 Construction and workmanship 11 9 Testing . 17 10 Acceptance criteria. 22 11 Technical requirements for new design type approval 27 12 Markings 28 13 Certificate 28 Annex A (normative) Manufacturers markings for LPG 29 An
12、nex B (informative) New design type approval certificate. 30 Annex C (informative) Acceptance certificate. 31 Bibliography . 33 BS ISO 4706:2008ISO 4706:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national stan
13、dards 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 org
14、anizations, 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
15、 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
16、 % 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 4706 was prepared by Technical Committee ISO/TC 58, Gas c
17、ylinders, Subcommittee SC 3, Cylinder design. This second edition cancels and replaces the first edition (ISO 4706:1989), which has been technically revised. ISO 4706 has been prepared to address the general requirements in Chapter 6.2 of the UN model regulations for the transportation of dangerous
18、goods ST/SG/AC.10/1Rev.15. It is intended to be used under a variety of regulatory regimes but has been written so that it is suitable for use with the conformity assessment system in 6.2.2.5 of ST/SG/AC.10/1/Rev.15. This corrected version incorporates the following corrections: following the cancel
19、lation of a proposed ISO 4706-2, the reference number has been changed from ISO 4706-1 to ISO 4706, therefore reference to individual parts of ISO 4706 has been removed from the foreword, references to ISO 4706-1 have been replaced by ISO 4706, and the page headers have been changed to read “ISO 470
20、6:2008”; the term “proof stress” has been replaced by the term “proof strength”; Subclause 7.4, Design of openings, has been moved to Clause 6, Design, and renumbered 6.3; the title of Figure 5 now relates to longitudinal welds, not circumferential welds; the graphics in Figure 5 have been modified
21、to depict a longitudinal weld. BS ISO 4706:2008ISO 4706:2008(E) ISO 2008 All rights reserved vIntroduction The purpose of this International Standard is to facilitate agreement on the design and manufacture of welded-steel gas cylinders in all countries. The requirements are based on knowledge of, a
22、nd experience with, materials, design requirements, manufacturing processes and controls in common use for the manufacture of gas cylinders. With respect to those aspects concerning construction materials, approval of design rules and inspection during manufacture, which are subject to national or i
23、nternational regulations, it is necessary for interested parties to ensure that in the practical application of this International Standard, the requirements of the relevant authority are also satisfied. BS ISO 4706:2008BS ISO 4706:2008INTERNATIONAL STANDARD ISO 4706:2008(E) ISO 2008 All rights rese
24、rved 1Gas cylinders Refillable welded steel cylinders Test pressure 60 bar and below 1 Scope This International Standard specifies the minimum requirements concerning material selection, design, construction and workmanship, procedure and test at manufacture of refillable welded-steel gas cylinders
25、of a test pressure not greater than 60 bar1), and of water capacities from 0,5 l up to and including 500 l exposed to extreme worldwide temperatures (50 C to +65 C) used for compressed, liquefied or dissolved gases. Transportable large cylinders of water capacity above 150 l and up to 500 l may be m
26、anufactured and certified to this International Standard provided handling facilities are provided (see 8.6.4). This International Standard is primarily intended to be used for industrial gases other than Liquefied Petroleum Gas (LPG), but may also be applied for LPG. For specific LPG applications s
27、ee ISO 22991. 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 4136, De
28、structive tests on welds in metallic materials Transverse tensile test ISO 5817, Welding Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) Quality levels for imperfections ISO 6892, Metallic materials Tensile testing Method of testing at ambient temperature ISO
29、 7438, Metallic materials Bend test ISO 9606-1, Qualification test of welders Fusion welding Part 1: Steels ISO 10297:2006, Transportable gas cylinders Cylinder valves Specification and type testing ISO 11117, Gas cylinders Valve protection caps and valve guards Design, construction and tests ISO 13
30、769, Gas Cylinders Stamp marking ISO 11622, Gas cylinders Conditions for filling gas cylinders ISO 15613, Specification and qualification of welding procedures for metallic materials Qualification based on pre-production welding test ISO 15614-1, Specification and qualification of welding procedures
31、 for metallic materials Welding procedure test Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys 1) 1 bar = 105Pa = 105N/m2. BS ISO 4706:2008ISO 4706:2008(E) 2 ISO 2008 All rights reservedISO 17636, Non-destructive testing of welds Radiographic testing of fusion-welde
32、d joints ISO 17637, Non-destructive testing of welds Visual testing of fusion-welded joints ISO 17639, Destructive tests on welds in metallic materials Macroscopic and microscopic examination of welds ISO 22991, Gas Cylinders Transportable refillable welded steel cylinders for liquefied petroleum ga
33、s (LPG) Design and construction 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 yield strength value corresponding to the upper yield strength, ReH, or, for steels when yielding does not occur at tensile t
34、esting, the 0,2 % proof strength (non-proportional elongation), Rp0,2 3.1.2 normalizing heat treatment in which a cylinder is heated to a uniform temperature above the upper critical point (Ac3) of the steel to regenerate or homogenize the metallurgical structure of the steel, to a sufficient degree
35、 to achieve the desired mechanical properties, and then cooled in a controlled or still air atmosphere 3.1.3 stress relieving heat treatment given to the cylinder, the object of which is to reduce the residual stresses without altering the metallurgical structure of the steel, by heating it to a uni
36、form temperature below the lower critical point (Ac1) of the steel, then cooling it in a controlled or still air atmosphere 3.1.4 stabilizing heat treatment given to the cylinder, the object of which is to stabilize the structure of the steel by heating it to a uniform temperature above the lower cr
37、itical point (Ac1) of the steel and subsequently cooling it to obtain the desired mechanical properties 3.1.5 batch quantity of cylinders made consecutively by the same manufacturer using the same manufacturing techniques, to the same design, size and material specifications using the same type of w
38、elding machines, welding procedures and to the same heat treatment conditions NOTE 1 In this context, “consecutively” need not apply to continuous production (start to finish). NOTE 2 See 10.2 for specific batch quantities. 3.1.6 base materials steel used to manufacture the cylinder including the pr
39、essure and non-pressure retaining materials of construction 3.1.7 cylinder shell cylinder after completion of all forming, welding and heat treatment operations BS ISO 4706:2008ISO 4706:2008(E) ISO 2008 All rights reserved 33.1.8 F Factor design stress factor 3.1.9 parent material all pressure retai
40、ning materials used in the fabrication of the cylinder 3.1.10 overlap placement of steel on top of or below a weld joint for the purpose of joint alignment or added joint strength 3.2 Symbols Symbol Definition Unit a Calculated minimum thickness of the cylindrical shell mm a1Calculated minimum value
41、 of a used in the calculation of b (see 7.2.2) of the cylinder head mm abMinimum thickness of the cylindrical shell (including any corrosion allowance) guaranteed by the manufacturer mm A Percentage elongation after fracture % Y Stabilized cylinder b Calculated minimum thickness of the end mm C Shap
42、e factor D Outside diameter of the cylinder as given in the design drawing mm DfOutside diameter of a bend test former mm F Design stress factor h Height of the cylindrical part of the end mm H Outside height of the domed part of the end mm J Stress reduction factor K Ellipsoidal Ratio L Length of t
43、he cylinder mm L0Original gauge length in accordance with ISO 6892 mm n Ratio of diameter of bend test former to the thickness of the test piece N Normalized cylinder PbMaximum pressure attained during the burst test bar PhActual test pressure applied to the cylinder by the manufacturer bar PtminMin
44、imum test pressure (see ISO 11622) bar BS ISO 4706:2008ISO 4706:2008(E) 4 ISO 2008 All rights reservedr Inside knuckle radius of the end mm R Inside dishing radius of the end mm ReHMinimum value of yield strength (apparent) guaranteed by the cylinder manufacturer for the finished cylinder N/mm2RgGua
45、ranteed tensile strength by the manufacturer N/mm2RmActual value of tensile strength determined by the tensile test specified in 9.1.2.2 N/mm2Rp0,20,2 % proof strength (see ISO 6892) N/mm2S Stress relieved cylinder S0Original cross-sectional area of tensile test piece in accordance with ISO 6892 mm2
46、4 Inspection and testing To ensure that the cylinders are in conformance with this International Standard, they shall be subject to inspection and testing in accordance with Clauses 7, 8, 9 and 10. Some countries of use may require that cylinders be inspected and tested by an authorized body. The in
47、spection body shall be recognized in the country of use and shall be competent for testing and inspecting cylinders in accordance with this International Standard. 5 Materials 5.1 The material used for the fabrication of the gas cylinder shall be steel, other than rimming quality, suitable for press
48、ing or drawing and welding, and shall not deteriorate with time (i.e. non-ageing). The steel grades used shall have specified, guaranteed, mechanical properties that are possible to achieve for the finished cylinder after normalizing, stress relieving or stabilizing. In cases where verification of t
49、he non-ageing property of the material is required, the criteria by which it is to be specified should be agreed by the manufacturer and purchaser, and included in the order. 5.2 Materials for shells and end pressings, excluding bosses (see 5.3), shall conform to the requirements of 5.8 and 5.9.1. 5.3 Bosses shall be manufactured from compatible weldable materials with a maximum carbon content of 0,25 %(m/m). 5.4 All items welded to the cylinder (e.g. shr
