ISO 9393-2:2005 specifies the test parameters and conditions for hydrostatic-pressure tests on valves made of the following thermoplastic materials: ABS, PE 80, PE 100, PP-H, PP-B, PP-R, PP-R-GF, PVC-C, PVC-U and PVDF. The tests cover the following aspects: the material used for manufacturing valves; the pressurized valve components; the complete valve.