GB/T 19471.1-2004

This standard specifies a test method for verifying the leak tightness of elastomeric-sealing-ring-type socket joints in unplasticized poly(vinyl chloride) (PVC-U) piping systems under combined internal pressure and angular deflection. It is applied in the quality control and performance testing of PVC-U pipe joints used in pressurized water supply, drainage, and sewage systems, ensuring joint integrity when pipes are installed with misalignment or at bends. The test simulates real-world conditions where joints must maintain a seal despite angular displacement, making it critical for civil engineering, municipal infrastructure, and industrial piping applications.