ISO-4126-3-2006.pdf
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1、 Reference number ISO 4126-3:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 4126-3 First edition 2006-03-01 Safety devices for protection against excessive pressure Part 3: Safety valves and bursting disc safety devices in combination Dispositifs de scurit pour protection contre les pressions excessive
2、s Partie 3: Soupapes de sret et dispositifs de sret disque de rupture en combinaison Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 03:08:57 MDTNo reproduction or networking per
3、mitted without license from IHS -,-,- ISO 4126-3:2006(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 co
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6、he Central Secretariat at the address given below. ISO 2006 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 eithe
7、r 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 2006 All rights reserved Copyright International
8、 Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 03:08:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4126-3:2006(E) ISO 2006 All rights reserved iii Contents Page Fore
9、word iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Symbols. 4 5 Design of combination. 5 6 Installation of combination 5 7 Combination performance. 6 8 Determination of combination discharge capacity factor, Fd, by testing. 6 9 Derivation of combination dischar
10、ge capacity factor, Fd. 9 10 Alternative to testing for Fd. 9 11 Certification of combination discharge capacity factor, Fd. 10 12 Application and use of the certified combination discharge capacity factor, Fd 10 13 Marking and identification of combination devices 10 14 Certification. 11 15 Prepara
11、tion for storage and transport 11 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 03:08:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4126-3:20
12、06(E) iv ISO 2006 All rights reserved Foreword 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
13、 interested in a 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 Electrotec
14、hnical Commission (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
15、the technical committees 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 righ
16、ts. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4126-3 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 69, Industrial valves, ISO/TC 185, Safety devices for protection against excessive pressure, in accordance with
17、the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). This first edition of ISO 4126-3 cancels and replaces ISO 6718:1991, of which it constitutes a technical revision. ISO 4126 consists of the following parts, under the general title Safety devices for protection against ex
18、cessive pressure: Part 1: Safety valves Part 2: Bursting disc safety devices Part 3: Safety valves and bursting disc safety devices in combination Part 4: Pilot-operated safety valves Part 5: Controlled safety pressure relief systems (CSPRS) Part 6: Application, selection and installation of burstin
19、g disc safety devices Part 7: Common data Part 9: Application and installation of safety devices excluding stand-alone bursting disc safety devices Part 7 contains data which is common to more than one of the parts of this standard to avoid unnecessary repetition. Copyright International Organizatio
20、n for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 03:08:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4126-3:2006(E) ISO 2006 All rights reserved v Introduction Bursting disc safet
21、y devices can be used in conjunction with safety valves in following cases: a) to protect the safety valve against corrosion, fouling or operating conditions which could affect the safety valve performance; b) to prevent leakage; c) to prevent total loss of contents from the protected equipment foll
22、owing the bursting of the bursting disc. The term combination is used to describe the close-coupled (i.e. within 5 pipe diameters) assembly of a bursting disc safety device with a safety valve or CSPRS, as defined by this part of ISO 4126. In some cases, the bursting disc safety device and the safet
23、y valve or CSPRS are connected together to form the combination by a short length of pipe or a spool piece. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 03:08:57 MDTNo reprodu
24、ction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/20/2007 03:08:57 MDTNo reproduction or networking permitted without license f
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- ISO 4126 2006
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