ISO-10802-1992.pdf
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1、IS0 LO802 92 9 4851903 0522742 3T5 9 I N T E R NAT I O NA L STANDARD IS0 10802 First edition 1992-1 2-1 5 Ductile iron pipelines - Hydrostatic testing after installation Canalisations en fonte ductile - Essais hydrostatiques aprs pose Reference number IS0 10802:1992(E) Copyright International Organi
2、zation for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:02:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 10802:1992(E) Foreword IS0 (the International Organization for Standardiz
3、ation) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be
4、 represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International S
5、tandards 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 the member bodies casting a vote. International Standard IS0 10802 was prepared by Technical Committee ISO/TC 5, Ferrous metal p
6、ipes and metallic fittings, Sub-Committee SC 2, Cast iron pipes, fittings and their joints. Annex A of this International Standard is for information only. 8 IS0 1992 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
7、 including photocopying and microfilm, without per- mission in writing from the publisher. International Organization for Standardization Case Postale 56 CH-1 21 1 Genve 20 Switzerland Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license wi
8、th ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:02:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 LO802 72 = 4851703 O522744 178 INTERNATIONAL STANDARD IS0 10802:1992(E) Ductile iron pipelines - Hydrostatic testing after installat
9、ion 1 Scope This International Standard specifies site hydrostatic acceptance tests for installed pressure and non- pressure ductile iron pipelines used for conveying water and other liquids. It does not cover testing of pipelines for gas. 2 Normative references The following standards contain provi
10、sions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the
11、possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 6708:1980, Pipe components - Definition of nominal size. IS0 7268:1983, Pipe components - Definition of nominal pressure. 3
12、 Definitions For the purposes of this International Standard, the definition of nominal size (DN) given in IS0 6708, the definition of nominal pressure given in IS0 7268 and the following definitions apply. 3.1 rated pressure of a component: Maximum pressure, under steady-state conditions, for which
13、 a component is designed. 3.2 working operating pressure: Maximum pressure, under steady-state conditions, for which a pipeline is designed. 3.3 maximum working operating pressure: Maximum pressure to which a pipeline is subjected under surge conditions. 3.4 test pressure: Pressure to which a pipeli
14、ne is subjected for testing purposes. 4 Selection and preparation of test sections 4.1 Recommended length of test sections 4.1.1 The length of pipeline test sections should be determined on the basis of the following consider- ations: a) the local conditions; b) the availability of suitable water; c
15、) the number of fittings and accessories (e.g. valves, hydrants, etc.) constituting the pipeline; d) the difference in elevation between different parts of the pipeline. 4.1.2 For pressure pipelines, the length of the test sections shall not exceed 1 500 m unless otherwise specified. 4.1.3 For non-p
16、ressure pipelines, the test section is usually the total length between consecutive manholes or inspection points. If special arrangements are made to enable testing over only part of the length between manholes and inspection points, then the length of the test section shall not exceed I O00 m unle
17、ss otherwise specified. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 04:02:03 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 10802:1992(E) 4.2
18、 Anchoring and closures 4.2.1 Pressure pipelines All changes in direction and/or cross-section of the pipeline, such as bends, tees, tapers (reducers) and blank flanges, shall be adequately restrained (or an- chored) before testing by means of thrust blocks or restraining (self-anchoring) joints. Th
19、e design of the restraining (anchoring) devices shall take due consideration of the test pressure to be ap- plied. Isolation of the test sections shall be achieved by us- ing blank flanges or other types of closures. If, for practical reasons, valves are used as closure pieces, the test pressure sha
20、ll not exceed the rated pressure of the valves. When evaluating the overall leakage al- lowance for a test section, due consideration shall be taken of the allowable leakage rate(s) of the valve(s). 4.2.2 Non-pressure pipelines Anchoring of non-pressure pipelines is not usually necessary owing to th
21、e low test pressure applied. 4.3 Partial backfilling before testing Pipelines are normally tested after backfilling. How- ever, when particular conditions necessitate that pressure testing be carried out before completion of backfilling or with the pipe joints accessible for examination, sufficient
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