3.1 Pressurizing device, capable of applying and regulating the water pressure in the test piece in a
sinusoidal or trapezoidal form between pressure limits as specified in the reference standard.
3.2 Pressure measurement device, capable of measuring the water pressure in the test piece to an accuracy of ±5 %. The device measurement shall be capable of producing a record of the sinusoidal or trapezoidal wave form.
3.3 Test chamber, capable of maintaining the specified test temperature (see Clause 4) to an accuracy of ±2 °C.
3.4 Thermometer(s), capable of checking conformity to the specified test temperature (see 3.3).
3.5 End-sealing device, of appropriate size and sealing method for sealing the non-joined end of the test
piece. The device shall be restrained in a manner which does not exert longitudinal forces on the joints. A typical test arrangement is shown in Figure 1.
4 Test parameters
Unless specified otherwise in the reference standard, the test parameters given in Table 1 shall apply.
5 Test pieces
The number of test pieces shall conform to Clause 4.
The test piece shall comprise an assembly of pipes and at least one fitting joined in accordance with the
manufacturer’s recommended practice.
The free length on each side of the fitting under test shall be not less than either 1,5dn or 300 mm, whichever is the greater, where dn is the nominal outside diameter of the pipe.
In order to include the required number of pipes and fitting(s), several test pieces may be tested simultaneously, provided the failure of one test piece does not affect the others under test.
6.1 Fill each test piece with water so that all the air is expelled.
6.2 Bring the test piece and water therein to the specified temperature (see Clause 4).
6.3 Condition the test piece at the applicable temperature (see Clause 4) in accordance with Table 2 before or after connecting the test piece(s) to the pressurizing device. If subsequent connection is necessary, ensure that all air is again expelled and that the conditioning has been completed immediately before connection to the pressurizing device.
7.1 Unless specified otherwise in the reference standard, subject the test piece to the applicable pressure
limits conforming to Table 3 and for the number of cycles and cycle frequency conforming to Clause 4, while, for the duration of the test and on completion
a) maintaining the test temperature,
b) monitoring the test piece for any signs of leaks, and
c) checking wave form at the start, at regular intervals and at the end of the test and recording them.
7.2 If leakage occurs prior to completion of the number of cycles, record the number of elapsed cycles and the position and nature of the leak.
7.3 On completion of the number of cycles, inspect all joints for any sign of leakage.