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 2003
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ii © ISO 2003 — All rights reserved

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

Foreword
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(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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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

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
...