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ISO
STANDARD
10802
First edition
1992-12-15
Ductile iron pipelines - Hydrostatic
testing after installation
Canalisa tions en fon te ductile
- Essais hydrostatiques apr& pose
Reference number
ISO 10802:1992(E)
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ISO 10802:1992(E)
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. Esch member body 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 Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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 the member bodies casting
a vote.
International Standard ISO 10802 was prepared by Technical Committee
lSO/rC 5, Ferrous metal pipes and metalk fittings, Sub-Committee SC 2,
Cast iron pipes, fittings and their joints.
Annex A of this International Standard is for information only.
0 ISO 1992
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1 211 Geneve 20 l Switzerland
Printed in Switzerland
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INTERNATIONAL STANDARD ISO 10802:1992(E)
Ductile iron pipelines - Hydrostatic testing after
installation
3.3 maximum working [operating] pressure:
1 Scope
Maximum pressure to which a Pipeline is subjected
under surge conditions.
This International Standard specifies site hydrostatic
acceptance tests for installed pressure and non-
3.4 test pressure: Pressure to which a Pipeline is
pressure ductile iron pipelines used for conveying
subjected for testing purposes.
water and other liquids.
lt does not cover testing of pipelines for gas.
4 Selection and preparation of test
2 Normative references
sections
The following Standards contain provisions which,
through reference in this text, constitute provisions
4.1 Recommended length of test sections
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
4.1.1 The length of Pipeline test sections should be
based on this International Standard are encouraged
determined on the basis of the following consider-
to investigate the possibility of applying the most re-
ations:
cent editions of the Standards indicated below.
Members of IEC and ISO maintain registers of cur-
a) the local conditions;
rently valid International Standards.
b) the availability of suitable water;
ISO 6708:1980, Pipe components - Definition of
nominal size.
c) the number of fittings and accessories (e.g. valves,
hydrants, etc.) constituting the Pipeline;
ISO 7268:1983, Pipe components - Definition of
nominal pressure.
d) the differente in elevation between different Parts
of the Pipeline.
3 Definitions
4.1.2 For pressure pipelines, the length of the test
For the purposes of this International Standard, the
sections shall not exceed 1 500 m unless otheiwise
definition of nominal size (DN) given in ISO 6708, the
specified.
definition of nominal pressure given in ISO 7268 and
the following definitions apply.
4.1.3 For non-pressure pipelines, the test section is
3.1 rated pressure of a component: Maximum
length between consecutive
usually the total
pressure, under steady-state conditions, for which a
manholes or inspection Points.
component is designed.
If special arrangements are made to enable testing
3.2 working [operating] pressure: Maximum over only part of the length between manholes and
pressure, under steady-state conditions, for which a inspection Points, then the length of the test section
Pipeline is designed. shall not exceed 1 000 m unless otherwise specified.
1
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ISO 10802:1992(E)
4.2 Anchoring and closures 5.1 Pressure pipelines
4.2.1 Pressure pipelines
5.1 .l Preliminary operations
All changes in direction and/or Cross-section of the
5.1.1.1 After filling and before application of the test
Pipeline, such as bends, tees, tapers (reducers) and
pressure, maintain the test section at the working
blank flanges, shall be adequately restrained (or an-
chored) before testing by means of thrust blocks or pressure for a sufficient period of time for it to stabil-
ize with respect to line movement under pressure,
restraining (self-anchoring) joints.
water absorption by the lining, etc.
The design of the restraining (anchoring) devices shall
Inspect visually all exposed joints, fittings, anchorages
take due consideration of the test pressure to be ap-
and closures and repair all defects, after draining the
plied.
test section if necessary.
Isolation of the test sections shall be achieved by us-
ing blank flanges or other types of closures. If, for
5.1.1.2 When the visual inspection is satisfactory,
practical reasons, valves are used as closure pieces,
,
raise the pressure steadily until the test pressures
the test pressure shall not exceed the rated pressure
specified in 5.1 .1.3 and 5.1 I.4 are attained.
of the valves. When evaluating the Overall leakage al-
Iowance for a test section, due consideration shall be
taken of the allowable leakage rate(s) of the valve(s). 5.1.1.3 The test pressure at the lowest Point of the
test section shall be not less than the limit specified
4.2.2 Non-pressure pipelines in a) or b), whichever is greater.
a) for working pressures less than or equal to 10 bar:
Anchoring of non-pressure pipelines is not usually
l,5 times the working pressure;
necessary owing to the low test pressure applied.
for working pressures greater than 10 bar: the
4.3 Partial backfilling before testing
working pressure plus 5 bar;
Pipelines are normally tested after backf
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