3 Principle A test piece, consisting of PVC-U pipes mounted into a PVC-U double socket coupler, is exposed to a specific cycle of internal hydrostatic pressures for specific test periods and at a specific temperature while the assembly is simultaneously subjected to a lateral bending force. 4 Apparatus 4.1 A pressure control device, connected to … Continue reading DIN EN ISO 13783 – Test Method for Leaktightness and Strength While Subjected to Bending and Internal Pressure – Testing Equipment