1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22397-7 SANS 4706:2009Edition 2ISO 4706:2008Edition 2SOUTH AFRICAN NATIONAL STANDARD Gas cylinders Refillable welded steel cylinders Test
4、pressure 60 bar and below This national standard is the identical implementation of ISO 4706:2008 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428
5、7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 4706:2009 Edition 2 ISO 4706:2008 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 58A, Vessels and systems under pressure Cylinders, in accordance with procedu
6、res of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in May 2009. This SANS document supersedes SANS 4706:1989 (edition 1). Reference numberISO 4706:2008(E)ISO 2008INTERNATIONAL STANDARD ISO4706First edition2008-04-15Corrected vers
7、ion2008-07-01Gas cylinders Refillable welded steel cylinders Test pressure 60 bar and below Bouteilles gaz Bouteilles en acier soudes rechargeables Pression dessai de 60 bar et moins SANS 4706:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SAB
8、S .ISO 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 unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In dow
9、nloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in th
10、e General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address
11、 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, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at
12、 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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedSANS 4706:2009This s tandard may
13、 only be used and printed by approved subscription and freemailing clients of the SABS .ISO 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 4 6 Desig
14、n 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 Annex B (in
15、formative) New design type approval certificate. 30 Annex C (informative) Acceptance certificate. 31 Bibliography . 33 SANS 4706:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4706:2008(E) iv ISO 2008 All rights reservedForeword ISO
16、(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 comm
17、ittee 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 electrote
18、chnical 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 memb
19、er 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 identifyi
20、ng any or all such patent rights. ISO 4706 was prepared by Technical Committee ISO/TC 58, Gas cylinders, 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 gener
21、al requirements in Chapter 6.2 of the UN model regulations for the transportation of dangerous 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.1
22、0/1/Rev.15. This corrected version incorporates the following corrections: following the cancellation 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
23、 4706-1 have been replaced by ISO 4706, and the page headers have been changed to read “ISO 4706:2008”; 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
24、 to longitudinal welds, not circumferential welds; the graphics in Figure 5 have been modified to depict a longitudinal weld. SANS 4706:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4706:2008(E) ISO 2008 All rights reserved vIntrodu
25、ction 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, and experience with, materials, design requirements, manufacturing processes and controls in common us
26、e 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 international regulations, it is necessary for interested parties to ensure that in the practical appl
27、ication of this International Standard, the requirements of the relevant authority are also satisfied. SANS 4706:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SANS 4706:2009This s tandard may only be used and printed by approved subscri
28、ption and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 4706:2008(E) ISO 2008 All rights reserved 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
29、, construction and workmanship, procedure and test at manufacture of refillable welded-steel gas cylinders 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, liquefi
30、ed or dissolved gases. Transportable large cylinders of water capacity above 150 l and up to 500 l may be manufactured 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
31、 other than Liquefied Petroleum Gas (LPG), but may also be applied for LPG. For specific LPG applications see 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
32、 references, the latest edition of the referenced document (including any amendments) applies. ISO 4136, Destructive 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
33、for imperfections ISO 6892, Metallic materials Tensile testing Method of testing at ambient temperature ISO 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 te
34、sting ISO 11117, Gas cylinders Valve protection caps and valve guards Design, construction and tests ISO 13769, Gas Cylinders Stamp marking ISO 11622, Gas cylinders Conditions for filling gas cylinders ISO 15613, Specification and qualification of welding procedures for metallic materials Qualificat
35、ion based on pre-production welding test ISO 15614-1, Specification and qualification of welding procedures 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. SANS 4706:2009This s tandard may onl
36、y be used and printed by approved subscription and freemailing clients of the SABS .ISO 4706:2008(E) 2 ISO 2008 All rights reservedISO 17636, Non-destructive testing of welds Radiographic testing of fusion-welded joints ISO 17637, Non-destructive testing of welds Visual testing of fusion-welded join
37、ts 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 gas (LPG) Design and construction 3 Terms, definitions and symbols 3.1 Terms and definition
38、s 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 testing, the 0,2 % proof strength (non-proportional elongation), Rp0,2 3.1.2 normalizing h
39、eat 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 to achieve the desired mechanical properties, and then cooled in a controlled or still a
40、ir 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 uniform temperature below the lower critical point (Ac1) of the steel, then cooling it in a
41、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 critical point (Ac1) of the steel and subsequently cooling it to obtain the desired mechani
42、cal 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 welding machines, welding procedures and to the same heat treatment conditions NOTE 1 In t
43、his 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 pressure and non-pressure retaining materials of construction 3.1.7 cylinder shell cylinder
44、 after completion of all forming, welding and heat treatment operations SANS 4706:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 4706:2008(E) ISO 2008 All rights reserved 33.1.8 F Factor design stress factor 3.1.9 parent material all
45、 pressure retaining 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 a1Calculate
46、d minimum value 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 th
47、e end mm C Shape 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 Rati
48、o L Length of the 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 manufactur
49、er bar PtminMinimum test pressure (see ISO 11622) bar SANS 4706:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 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/mm2RgGuaranteed tensile strength by the manuf
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