1、 Reference number ISO 10460:2005(E) ISO 2005INTERNATIONAL STANDARD ISO 10460 Second edition 2005-02-15 Gas cylinders Welded carbon-steel gas cylinders Periodic inspection and testing Bouteilles gaz Bouteilles gaz soudes en acier au carbone Contrles et essais priodiques ISO 10460:2005(E) PDF disclaim
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4、ile; 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 given below. ISO 2005 All right
5、s 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 the address below or ISOs member body in the country of the
6、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 10460:2005(E) ISO 2005 All rights reserved iiiContents Page Foreword iv Introduction v 1
7、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 Depressurization and de-valving procedures 3 7 External visual inspection 3 8
8、Internal visual inspection. 4 9 Supplementary tests. 4 10 Inspection of cylinder neck 4 11 Pressure test . 5 12 Repair of cylinders 6 13 Inspection of valve and other accessories. 6 14 Final operations 6 15 Rejection and rendering cylinders unserviceable. 9 Annex A (informative) Intervals between pe
9、riodic inspections and tests 10 Annex B (informative) List of gases corrosive to cylinder material 11 Annex C (normative) Description and evaluation of defects and conditions for rejection of welded carbon-steel gas cylinders at time of visual inspection . 12 Annex D (normative) Procedure to be adop
10、ted when de-valving and/or when it is suspected that a cylinder valve is obstructed. 16 Annex E (informative) Inspection and maintenance of valves and their junctions: recommended procedures. 19 Annex F (informative) Test date rings for gas cylinders 20 Bibliography . 21 ISO 10460:2005(E) iv ISO 200
11、5 All rights reservedForeword 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
12、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
13、 (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 com
14、mittees 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
15、 be held responsible for identifying any or all such patent rights. ISO 10460 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 10460:1993), which has been techn
16、ically revised. ISO 10460:2005(E) ISO 2005 All rights reserved vIntroduction The principal aim of a periodic inspection and testing procedure is to be satisfied that at the completion of the test the cylinders can be re-introduced into service for a further period of time. The inspection and test ar
17、e to be carried out only by persons who are authorized under the relevant regulations and competent in the subject to assure all concerned that the cylinders are fit for continued safe use. Experience of inspection and testing of cylinders that are specified in this International Standard is an impo
18、rtant factor when determining whether a cylinder should be returned into service. INTERNATIONAL STANDARD ISO 10460:2005(E) ISO 2005 All rights reserved 1Gas cylinders Welded carbon-steel gas cylinders Periodic inspection and testing 1 Scope This International Standard deals with welded, carbon-steel
19、, transportable gas cylinders intended for compressed and liquefied gases under pressure, of water capacity from 0,5 l to 150 l; it also applies, as far as practical, to cylinders of less than 0,5 l water capacity and greater than 150 l up to 450 l. This International Standard specifies the requirem
20、ents for periodic inspection and testing to verify the integrity of such gas cylinders for further service. This International Standard does not apply to the periodic inspection and testing of acetylene cylinders or composite (fully wrapped or hoop-wrapped) cylinders. This International Standard is
21、primarily for industrial gases other than liquefied petroleum gas (LPG), but may also be applied for LPG. For specific LPG applications, see ISO 10464. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edi
22、tion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 11621, Gas cylinders Procedures for change of gas service ISO 11114-2, Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 2:
23、 Non-metallic materials ISO 13341, Transportable gas cylinders Fitting of valves to gas cylinders 3 Intervals between periodic inspections and tests A cylinder shall be due for a periodic inspection and test on its first receipt by a filler after the expiry of the interval in accordance with the req
24、uirements 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 been subjected to normal conditions of use and has not been subjected to abusive and ab
25、normal 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 have lapsed. It is the responsibility of the owner or user to submit the cylinder for a
26、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 10460:2005(E) 2 ISO 2005 All rights reserved4 List of procedures for periodic inspections and tests Each cylinder shal
27、l 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 of cylinder and preparation for inspections and tests (Clause 5); b) depressurization an
28、d de-valving procedures (Clause 6); c) external visual inspection (Clause 7); d) internal visual inspection (Clause 8); e) supplementary tests (Clause 9); f) inspection of cylinder neck (Clause 10); g) pressure test (Clause 11); h) repair of cylinders (Clause 12); i) inspection of valve and other ac
29、cessories (Clause 13); j) final operations (Clause 14); k) rejection and rendering cylinders unserviceable (Clause 15). It is recommended that the previously listed tests be performed in the suggested sequence. In particular the internal visual inspection (Clause 8) should be carried out before the
30、pressure test (Clause 11). Cylinders that fail an inspection or tests shall be rejected (see Clause 15). Where a cylinder passes the above procedures, but when the condition of the cylinder remains in doubt, additional tests shall be performed to confirm its suitability for continued service or the
31、cylinder shall be rendered unserviceable. Depending on the reason for the rejection, some cylinders may be recovered (see Clause 8, 10.3 and Annex C). The inspections and tests shall be carried out only by persons who are competent in the subject and authorized under relevant regulations. Mechanical
32、 properties of steel cylinders can be affected by heat. Therefore, the maximum temperature for any operation shall be limited according to the manufacturers recommendations. 5 Identification of cylinder and preparation for inspections and tests Before any work is carried out, the relevant cylinder d
33、ata (e.g. see ISO 13769) and its contents and ownership shall be identified. Cylinders with incorrect or illegible markings, unknown gas contents or those that cannot be safely emptied of gas shall be set aside for special handling. If contents are identified as hydrogen or other embrittling gases,
34、only those cylinders manufactured or qualified as hydrogen cylinders shall be used for that service. It shall be checked that the cylinder is compatible for hydrogen service, i.e. with respect to the maximum tensile strength and internal surface condition. For example, cylinders according to ISO 137
35、69 are stamped “H”. All other cylinders shall be withdrawn from hydrogen service and their suitability checked for their new intended service. ISO 10460:2005(E) ISO 2005 All rights reserved 36 Depressurization and de-valving procedures The cylinders shall be depressurized and emptied in a safe, cont
36、rolled manner before proceeding. Particular attention shall be given to cylinders containing flammable, oxidizing or toxic gases to eliminate risks at the internal inspection stage. Before removing any pressure-retaining accessory (valve, flange, etc.), a positive check shall be performed to ensure
37、that the cylinder does not contain any gas under pressure. This can be performed as described in Annex D using a device such as shown in Figure D.1. Cylinders with inoperative or blocked valves shall be treated as outlined in Annex D. Provided the requirements previously stated have been complied wi
38、th, the cylinder shall be depressurized safely and the valve shall be removed. 7 External visual inspection 7.1 Preparation for external visual inspection When necessary, each cylinder shall be cleaned and have all loose coatings, corrosion products, tar, oil or other foreign matter removed from its
39、 external surface by a suitable method, e.g. brushing, shot-blasting (under closely controlled conditions), water jet abrasive cleaning, chemical cleaning or other suitable methods. The method used to clean the cylinder shall be a validated, controlled process. Care shall be taken at all times to av
40、oid damaging the cylinder or removing excess amounts of cylinder wall (see Annex C). If fused nylon, polyethylene or a similar coating has been applied and the coating is seen to be damaged or prevents a proper inspection, then the coating shall be stripped. If the coating has been removed by the ap
41、plication of heat, in no case shall the temperature of the cylinder have exceeded 300 C. 7.2 Inspection procedure The external surface of each cylinder shall then be inspected for a) dents, cuts, gouges, bulges, cracks, laminations or excessive base wear; b) heat damage, torch or electric-arc burns
42、(as specified in Table C.1); c) corrosion (as defined in Table C.2); d) other defects such as illegible, incorrect or unauthorized stamp markings, or unauthorized additions or modifications; e) integrity of all permanent attachments (see C.2); and f) vertical stability, if relevant (see Table C.1).
43、When inspecting for corrosion see c), special attention shall be given to areas where water could be trapped. These include the entire base area, the junction between the body and the foot-ring and the junction between body and the shroud. For rejection criteria, see Annex C. Cylinders no longer sui
44、table for future service shall be rendered unserviceable (see Clause 15). ISO 10460:2005(E) 4 ISO 2005 All rights reserved8 Internal visual inspection Each cylinder shall be inspected internally using adequate illumination to identify any defects similar to those listed in 7.2 a) and 7.2 c). Precaut
45、ions shall be taken to ensure that the method of illumination presents no risks to the tester while performing the operation. Any internal liner or coating that may obstruct optimum internal visual inspection shall be removed. Any cylinder showing presence of foreign matter or signs of more than lig
46、ht surface corrosion shall be cleaned internally under closely controlled conditions by shot-blasting, water jet abrasive cleaning, flailing, steam jet, hot water jet, rumbling, chemical cleaning or other suitable method. The method used to clean the cylinder shall be a validated, controlled process
47、. Care shall be taken at all times to avoid damaging the cylinder or removing excess amounts of cylinder wall (see Annex C). If cleaning is required, the cylinder shall be reinspected after the cleaning operation. 9 Supplementary tests Where there is doubt concerning the type and/or severity of a de
48、fect found on visual inspection, additional tests or methods of examination shall be applied, e.g. ultrasonic techniques, check weighing or other non- destructive tests. 10 Inspection of cylinder neck 10.1 Cylinder to valve threads When the valve is removed, the cylinder to valve threads shall be ex
49、amined to identify the type of thread (e.g. 25E) and to ensure that they are clean and of full form, free of damage, free of burrs, free of cracks, and free of other imperfections. 10.2 Other neck surfaces Other surfaces of the neck shall also be examined to ensure they are free of cracks or other defects (see Annex C). 10.3 Damaged internal neck threads Where necessary and where the manufacturer or the competent design authority confirms that the design of the neck permits, threads may be re-tapped or the thread
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