SANS 10461-2006 Gas cylinders - Seamless aluminium-alloy gas cylinders - Periodic inspection and testing《储气瓶 无缝铝合金储气瓶 定期检验和试验》.pdf

《SANS 10461-2006 Gas cylinders - Seamless aluminium-alloy gas cylinders - Periodic inspection and testing《储气瓶 无缝铝合金储气瓶 定期检验和试验》.pdf》由会员分享，可在线阅读，更多相关《SANS 10461-2006 Gas cylinders - Seamless aluminium-alloy gas cylinders - Periodic inspection and testing《储气瓶 无缝铝合金储气瓶 定期检验和试验》.pdf（48页珍藏版）》请在麦多课文档分享上搜索。

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 0-626-17612-3 SANS 10461:2006Edition 2ISO 10461:2005Edition 2SOUTH AFRICAN NATIONAL STANDARD Gas cylinders Seamless aluminium-alloy gas cylinders Pe

4、riodic inspection and testing This national standard is the identical implementation of ISO 10461:2005 and is adopted with the permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 42

5、8 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 10461:2006 Edition 2 ISO 10461:2005 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA SC 5120.05D, Vessels and syste

6、ms under pressure Cylinders, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. In South Africa, the inspection and test periods indicated in annex A are replaced by those given in SANS 1825. Whilst the shape and colour of test rings shown i

7、n this standard are identical to those used in South Africa, a different approach is followed in their use. The ISO standard states that when a cylinder undergoes periodic inspection and testing, the test station will affix the test ring that, according to the chart, corresponds to the next test dat

8、e for that particular cylinder. For example, if an oxygen cylinder undergoes a periodic inspection and test in 2006, then the test ring affixed under the valve will correspond to the colour and shape shown in the chart in the ISO standard for the year 2016 (since oxygen cylinders are tested every 10

9、 years.) In South Africa we have adopted the opposite practice, i.e. that of affixing under the valve the test ring applicable to the year in which the current test was carried out. Therefore, in the above example, the test ring applicable to the year 2006 would be affixed under the valve. This edit

10、ion cancels and replaces SANS edition 1 (SANS 10461:2003). Reference numberISO 10461:2005(E)ISO 2005INTERNATIONAL STANDARD ISO10461Second edition2005-02-15Gas cylinders Seamless aluminium-alloy gas cylinders Periodic inspection and testing Bouteilles gaz Bouteilles gaz sans soudure en alliage dalumi

11、nium Contrles et essais priodiques ISO 10461:2005(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 comput

12、er performing the editing. In downloading 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

13、 this PDF file can be found in the 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 C

14、entral Secretariat at the address given below. ISO 2005 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 IS

15、O 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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reservedISO 10461:2005(E) ISO 2005 A

16、ll rights reserved iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Intervals between periodic inspections and tests. 1 4 List of procedures for periodic inspections and tests 2 5 Identification of cylinder and preparation for inspections and tests 2 6 Depressurizat

17、ion and de-valving procedures 2 7 External visual inspection 3 8 Check of internal condition 4 9 Supplementary tests. 4 10 Inspection of cylinder neck 5 11 Pressure test or ultrasonic examination 5 12 Inspection of valve and other accessories.15 13 Cylinder repairs. 15 14 Final operations 15 15 Reje

18、ction and rendering cylinders unserviceable. 18 Annex A (informative) Intervals between periodic inspections and tests 19 Annex B (normative) Description and evaluation of defects and conditions for rejection of seamless aluminium-alloy gas cylinders at time of visual inspection 20 Annex C (normativ

19、e) Procedure to be adopted when de-valving and/or when it is suspected that a cylinder valve is obstructed. 25 Annex D (informative) Cleaning of aluminium-alloy gas cylinders . 28 Annex E (informative) Volumetric expansion testing of gas cylinder. 29 Annex F (informative) Inspection and maintenance

20、of valves and their junctions: recommended procedures. 37 Annex G (informative) Test date rings for gas cylinders 38 Bibliography . 39 ISO 10461:2005(E) iv ISO 2005 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bo

21、dies (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 organizatio

22、ns, 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

23、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 th

24、e 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 10461 was prepared by Technical Committee ISO/TC 58, Gas cylinder

25、s, Subcommittee SC 4, Operational requirements for gas cylinders. This second edition cancels and replaces the first edition (ISO 10461:1993), which has been technically revised. ISO 10461:2005(E) ISO 2005 All rights reserved vIntroduction The principal aim of a periodic inspection and testing proce

26、dure is to be satisfied that at the completion of the inspection and test, the cylinders (single or those from bundles) can be reintroduced into service for a further period of time. The inspection and test are to be carried out only by persons who are authorized under the relevant regulations and c

27、ompetent in the subject to assure all concerned that the cylinders are fit for continued safe use. The results of inspection and testing for the cylinders that are specified in this International Standard determine whether a cylinder should be returned to service. INTERNATIONAL STANDARD ISO 10461:20

28、05(E) ISO 2005 All rights reserved 1Gas cylinders Seamless aluminium-alloy gas cylinders Periodic inspection and testing 1 Scope This International Standard deals with seamless aluminium-alloy transportable gas cylinders intended for compressed and liquefied gases under pressure, of water capacity f

29、rom 0,5 l to 150 l; it also applies, as far as practical, to cylinders of less than 0,5 l water capacity. This International Standard specifies the requirements for periodic inspection and testing to verify the integrity of such gas cylinders for further service. This International Standard does not

30、 apply to periodic inspection and testing of acetylene cylinders or composite cylinders with aluminium-alloy liners. 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 ref

31、erences, the latest edition of the referenced document (including any amendments) applies. ISO 9712, Non-destructive testing Qualification and certification of personnel ISO 11114-2:2000, Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 2: Non-metallic

32、 materials ISO 11621, Gas cylinders Procedures for change of gas service ISO 13341, Transportable gas cylinders Fitting of valves to gas cylinders ISO 13769, Gas cylinders Stamp marking 3 Intervals between periodic inspections and tests A cylinder shall be due for a periodic inspection and test on i

33、ts first receipt by a filler after the expiry of the interval in accordance with the requirements of the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations or as specified by national or international authorities (see examples in Annex A). Provided the cylinder has

34、 been subjected to normal conditions of use and has not been subjected to abusive and abnormal conditions rendering the cylinder unsafe, there is no general requirement for the user to return a gas cylinder before the contents have been used even though the periodic inspection and test interval may

35、have lapsed. It is the responsibility of the owner or user to submit the cylinder for a periodic inspection and test within the interval specified by national or international authorities, or as specified in the relevant cylinder design standard if this is shorter. ISO 10461:2005(E) 2 ISO 2005 All r

36、ights reserved4 List of procedures for periodic inspections and tests Each cylinder shall be submitted to periodic inspections and tests. The following procedures, where applicable, form the requirements for such inspections and tests and are explained more fully in later clauses: a) identification

37、of cylinder and preparation for inspections and tests (Clause 5); b) depressurization and de-valving procedures (Clause 6); c) external visual inspection (Clause 7); d) check of internal condition (Clause 8); e) supplementary tests (Clause 9); f) inspection of cylinder neck (Clause 10); g) pressure

38、test or ultrasonic examination (Clause 11); h) inspection of valve and other accessories (Clause 12); i) cylinder repairs (Clause 13); j) final operations (Clause 14); k) rejection and rendering cylinders unserviceable (Clause 15). It is recommended that these procedures be performed in the sequence

39、 listed. In particular, the check of internal condition (Clause 8) should be carried out before the pressure test or, although not required, before the ultrasonic examination (Clause 11). Cylinders that fail an inspection or test shall be rejected (see Clause 15). Where a cylinder passes the above p

40、rocedures, but when the condition of the cylinder remains in doubt, additional tests shall be performed to confirm its suitability for continued service (see Clause 9) or the cylinder shall be rendered unserviceable. Depending on the reason for the rejection, some cylinders may be recovered (see Ann

41、ex B). The inspections and tests shall be carried out only by persons who are competent in the subject and authorized under the relevant regulations. Mechanical properties of aluminium-alloy cylinders can be affected by heat exposure. Therefore, the maximum temperature for any operation shall be lim

42、ited according to the manufacturers recommendations (see 14.2.2). 5 Identification of cylinder and preparation for inspections and tests Before any work is carried out, the relevant cylinder data (e.g. see ISO 13769) and its contents and ownership shall be identified (e.g. from the labelling and sta

43、mping). Cylinders with incorrect or illegible markings or unknown gas contents shall be set aside for special handling. 6 Depressurization and de-valving procedures 6.1 General Cylinders to be internally inspected or tested by a pressure test are required to be depressurized and de-valved. Cylinders

44、 not internally visually inspected and tested by ultrasonic examination do not require complete depressurization and de-valving unless the ultrasonic examination indicates there is an unacceptable flaw present and the inspector wishes to further investigate (see 11.4.6). ISO 10461:2005(E) ISO 2005 A

45、ll rights reserved 36.2 Cylinders requiring depressurization Cylinders shall be depressurized in a safe, controlled manner before proceeding. Particular attention shall be given to cylinders containing flammable, oxidizing, corrosive or toxic gases to eliminate risks at the internal inspection stage

46、. Before removing any pressure-retaining accessory (valve, flange, etc.), a positive check shall be performed to ensure that the cylinder does not contain any gas under pressure. This can be performed as described in Annex C using a device such as shown in Figure C.1. Cylinders with inoperative or b

47、locked valves shall be treated as outlined in Annex C. Similarly in the case of cylinders disassembled from bundles not equipped with cylinder valves, the connecting tee junctions shall also be checked to determine whether the gas is able to pass freely from the cylinders using for example the devic

48、e shown in Figure C.1. Provided the requirements previously stated have been complied with, the cylinder shall be depressurized safely and the valve shall be removed. 6.3 Cylinders not requiring de-valving Cylinders shall be depressurized below 5 bar to perform ultrasonic examination. For cylinders

49、being inspected by the ultrasonic method, refer to Clause 8. 7 External visual inspection 7.1 Preparation for external visual inspection If a cylinders external condition prevents or hinders a proper visual inspection of the surface, then the cylinder shall be prepared before the inspection. The cylinder shall be cleaned and have all loose coatings, corrosion products, tar, oil or other foreign matter removed from its external surface by a suitable method, e.g. brushing, water jet abrasive cleaning, chemical cleanin