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 0-626-17610-7 SANS 10462:2006Edition 2ISO 10462:2005Edition 2SOUTH AFRICAN NATIONAL STANDARD Gas cylinders Transportable cylinders for dissolved ace
4、tylene Periodic inspection and maintenance This national standard is the identical implementation of ISO 10462:2005 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 000
5、1 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 10462:2006 Edition 2 ISO 10462:2005 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA SC 5120.05D, Vess
6、els and systems 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
7、rings shown in 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
8、next test date 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 te
9、sted every 10 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 val
10、ve. This edition cancels and replaces SANS edition 1 (SANS 10462:2003). Reference numberISO 10462:2005(E)ISO 2005INTERNATIONAL STANDARD ISO10462Second edition2005-02-15Gas cylinders Transportable cylinders for dissolved acetylene Periodic inspection and maintenance Bouteilles gaz Bouteilles transpor
11、tables pour actylne dissous Contrles et entretien priodiques ISO 10462:2005(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 a
12、nd installed on the computer 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 softwa
13、re products used to create 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
14、found, please inform the Central 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
15、 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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reservedIS
16、O 10462:2005(E) ISO 2005 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Intervals between periodic inspections 3 5 Preparation of gas cylinder 4 6 Inspection and maintenance 5 7 Identification of contents . 8 8 Markin
17、gs. 8 9 Records 8 10 Rejection and rendering cylinders unserviceable. 9 11 Disposal of unserviceable cylinders. 9 Annex A (informative) Inspection periods . 10 Annex B (normative) Procedure to be adopted when de-valving and when it is suspected that a cylinder valve is obstructed. 11 Annex C (normat
18、ive) Description and evaluation of defects and conditions for rejection of acetylene gas cylinders at time of visual inspection 13 Annex D (informative) Tops of acetylene cylinders containing monolithic porous mass 16 Annex E (informative) Illustration of cracks in the porous mass of an acetylene cy
19、linder, and tools and clearance gauges. 18 Annex F (informative) Inspection and maintenance of valves and their junctions: recommended procedures. 20 Annex G (informative) Test date rings for gas cylinders 21 Bibliography . 22 ISO 10462:2005(E) iv ISO 2005 All rights reservedForeword ISO (the Intern
20、ational 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 b
21、een 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 sta
22、ndardization. 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 f
23、or 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 a
24、ll such patent rights. ISO 10462 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4, Operational requirements for gas cylinders. This second edition cancels and replaces the first edition (ISO 10462:1994), which has been technically revised. ISO 10462:2005(E) ISO 2005 Al
25、l rights reserved vIntroduction Acetylene cylinders differ from all other cylinders transporting compressed or liquefied gases in that they contain a porous mass and normally a solvent in which the acetylene stored is dissolved. However, for special applications there is also a limited quantity of a
26、cetylene cylinders containing a porous mass and no solvent. For the periodic inspection cycle, due regard is to be given to the different types of porous masses. The remainder of this document should be read considering these differences. The primary objective of the presence of the porous mass is t
27、o limit an acetylene decomposition, should it be initiated, and thus prevent a cylinder incident. If some porous mass is missing or if a defect (e.g. a cavity, crack or void of significant size) exists as a result of breakdown or subsidence of the porous mass, then the decomposition could progress a
28、t a rate that could cause an explosion. The requirements dealt with in this document are mainly those that are specific for acetylene cylinders; for more general requirements related to the periodic inspection of gas cylinders, reference is made to the relevant ISO documents. The periodic inspection
29、 of acetylene cylinders is to be performed only by competent persons and, in those jurisdictions requiring it, persons authorized by the regulatory authority. Due to the presence of a porous mass in the cylinder, neither a hydraulic or pneumatic pressure test, nor a visual inspection of the internal
30、 surface of the shell can be carried out. INTERNATIONAL STANDARD ISO 10462:2005(E) ISO 2005 All rights reserved 1Gas cylinders Transportable cylinders for dissolved acetylene Periodic inspection and maintenance 1 Scope This International Standard specifies the requirements for periodic inspection of
31、 seamless and welded cylinders manufactured from steel or aluminium alloys intended for the transport of acetylene in cylinders of water capacity up to 150 l and the requirements for the periodic inspection and maintenance of acetylene cylinders, regardless of the method of manufacture of the shell.
32、 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 3807-1:2000, Cylinder
33、s for acetylene Basic requirements Part 1: Cylinders without fusible plugs ISO 3807-2:2000, Cylinders for acetylene Basic requirements Part 2: Cylinders with fusible plugs ISO 13341, Transportable gas cylinders Fitting of valves to gas cylinders ISO 13769, Gas cylinders Stamp marking 3 Terms and def
34、initions For the purposes of this document, the following terms and definitions apply. 3.1 acetylene bundle transportable unit consisting of two or more acetylene cylinders manifolded together within a rigid frame, equipped with all necessary equipment for filling and emptying in the assembled state
35、 3.2 acetylene cylinder pressure vessel manufactured and suitable for transport of acetylene, containing a porous mass and solvent (where applicable) for acetylene with valve and other accessories fixed to the cylinder NOTE 1 For solvent-free acetylene cylinders, see Clause 6 of ISO 3807-1:2000 or I
36、SO 3807-2:2000. NOTE 2 When there is no risk of ambiguity, the word “cylinder” is used. 3.3 acetylene/solvent ratio ratio of the maximum acetylene content to the specified solvent content ISO 10462:2005(E) 2 ISO 2005 All rights reserved3.4 competent authority any national body or authority designate
37、d or otherwise recognized as such for any purpose in connection with this International Standard 3.5 competent person person who by a combination of training, experience and supervision is able to make objective judgments on the subject 3.6 complete cylinder cylinder shell ready to be charged with a
38、cetylene gas that is complete with porous mass, solvent (where applicable), saturation gas (where applicable), valve and any valve protection permanently fixed to the cylinder shell 3.7 cylinder shell pressure vessel manufactured and suitable for receiving and containing a porous mass and to be fill
39、ed as an acetylene cylinder 3.8 manufacturer company responsible for filling the cylinder shell with porous mass and which generally prepares it for the first charge of acetylene 3.9 maximum acetylene content specified maximum mass of acetylene the cylinder is designed to contain NOTE 1 Maximum acet
40、ylene content is expressed in kilograms. NOTE 2 When a solvent is used, it includes the saturation gas. 3.10 maximum permissible settled pressure maximum permissible gauge pressure, at a uniform temperature of 15 C, in a cylinder containing the maximum acetylene content and the specified solvent con
41、tent NOTE Maximum permissible settled pressure is expressed in bar. 3.11 porosity ratio of the total volume (water capacity) of the cylinder shell minus the volume of the solid material of the porous mass, to the water capacity of the cylinder shell NOTE Porosity is expressed as a percentage. 3.12 p
42、orous mass porous substance single or multi-component material introduced or formed in the cylinder shell in order to fill it and that, due to its porosity, allows the absorption of the solvent and acetylene gas solution NOTE The porous mass may be monolithic or non-monolithic. Monolithic porous mas
43、s consists of a solid product typically obtained by reacting materials or by bonding materials together with a binder. Non-monolithic porous mass consists typically of granular, fibrous or similar materials without addition of a binder. ISO 10462:2005(E) ISO 2005 All rights reserved 33.13 solvent li
44、quid that is absorbed by the porous mass and is capable of dissolving and releasing the acetylene NOTE The following abbreviations are used: “A” for acetone; “DMF” for dimethylformamide. 3.14 tare weight reference mass of the acetylene cylinder with the specified amount of solvent NOTE 1 Tare weight
45、 is expressed in kilograms. NOTE 2 This is further specified in accordance with 3.14.1, 3.14.2 or 3.14.3. NOTE 3 For cylinders with solvent, the tare weight is expressed by indicating either one or both of the masses corresponding to tare A and tare S. For solvent-free acetylene cylinders, the tare
46、weight is expressed by indicating a tare F. For the tare weight used for cylinders in bundles, see ISO 3807-1 or ISO 3807-2, 7.5.3. 3.14.1 tare A sum of empty mass of the cylinder shell, the mass of the porous substance (see 3.12), the specified mass of solvent, the mass of any coating (e.g. paint)
47、used in service, the mass of the valve including thermocouple where fitted, any fixed valve guard and the mass of all other parts that are permanently attached (e.g. by clamping or bolt fixing) to the cylinder when it is presented for filling 3.14.2 tare S tare A plus the acetylene mass required to
48、saturate the solvent at normal atmospheric pressure (1,013 bar) and at a temperature of 15 C (saturation gas) NOTE Tare S is expressed in kilograms. 3.14.3 tare F tare A minus the specified mass of solvent 3.15 total weight total mass equal to tare A (or tare F for solvent-free cylinders) plus the m
49、aximum acetylene content NOTE Total weight is expressed in kilograms. 3.16 water capacity (cylinder shell volume) actual capacity of the cylinder shell, measured by filling the shell with water NOTE 1 Water capacity is expressed in litres. NOTE 2 The cylinder shell is defined as being empty of any porous mass, see 3.7. 4 Intervals between periodic inspections A cylinder shall be due for periodic inspection on its first receipt by a filler after the expiry of the interval in accordance with the requirements of the
