ISO 15306:2003

INTERNATIONAL ISO
STANDARD 15306
First edition
2003-12-01


Glass-reinforced thermosetting plastics
(GRP) pipes — Determination of the
resistance to cyclic internal pressure
Tubes en plastiques thermodurcissables renforcés de verre (PRV) —
Détermination de la résistance à la pression cyclique interne




Reference number
ISO 15306:2003(E)
©
ISO 2003

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ISO 15306:2003(E)
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ii © ISO 2003 — All rights reserved

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ISO 15306:2003(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Terms and definitions. 1
3 Principle . 2
4 Apparatus. 2
5 Test pieces. 2
6 Test temperature . 4
7 Procedure. 4
8 Expression of results. 5
9 Test report. 5

© ISO 2003 — All rights reserved iii

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ISO 15306:2003(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. Each 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.
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 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 be held responsible for identifying any or all such patent rights.
ISO 15306 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 6, Reinforced plastics pipes and fittings for all applications.

iv © ISO 2003 — All rights reserved

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INTERNATIONAL STANDARD ISO 15306:2003(E)

Glass-reinforced thermosetting plastics (GRP) pipes —
Determination of the resistance to cyclic internal pressure
1 Scope
This International Standard specifies a method for determining the resistance of glass-reinforced
thermosetting plastics (GRP) pipes to cyclic internal pressure.
NOTE Whilst this standard refers to pipes, the procedure described can also be applied to fittings.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
cyclic pressure
1)
pressure, expressed in bars , which fluctuates about a specified value at a given frequency and with the
same amplitude above and below the specified value
2.2
mean pressure
specified pressure level, expressed in bars, about which the pressure fluctuates
2.3
pressure amplitude
difference between the specified value, expressed in bars, of the cyclic pressure and the upper or lower
pressure limit
2.4
cycle frequency
number of cycles per unit time, expressed in cycles per minute
2.5
cycle length
time taken for the pressure to change from the lower limit to the upper limit and then return to the lower limit
2.6
leakage
continuous loss of test fluid through the pip
...