ISO DIS 7432

Description / Abstract: This International Standard specifies methods of test for joints with a locked socket and spigot, including double-socket joints, and with elastomeric seals, for buried and above ground glassreinforced thermosetting plastics (GRP) piping systems. It covers methods of test for leaktightness and resistance to damage of the joint only, when subjected to specified combinations of angular movement, compression (deformation) perpendicular to the pipe axis and internal pressure. It assumes that the joint will be exposed to the effects of hydrostatic end thrust. This International Standard is applicable to joints for either pressure or non-pressure applications. The tests are suitable for the evaluation of joints intended for applications in which the liquids are conveyed at temperatures specified in the referring standards.

The joints tested in accordance with this International Standard are subjected to conditions which measure their ability to function and thereby prove the design of the joint, especially for type test purposes.

With the exception of the bending test (8.6), the test procedures are applicable to joints for pipes and fittings of all nominal sizes. The test detailed in 8.6 is applicable to joints with pipes and fittings up to and including DN 600.

The test procedures in this International Standard are damaging to the test piece, which will not be suitable for reuse after these tests. The test procedure shall be applied for type testing purposes.

This standard is applicable only to the joint, and specifies methods of test to prove its design.