Seven new national standards for the implementation of pipe fitting

The National Technical Committee for Standardization Technical Committee on Plastic Pipes, Fittings and Valves recently stated that seven new national standards for plastic pipes and fittings have been formally implemented.

According to reports, the national standards issued this time are based on international standards (repair), and according to the changes in domestic and foreign materials technology, pipe processing technology and environmental protection requirements, some of the contents were revised. Among them, the main technical contents of the revision of national standards for PVC-U pipes for water supply are: increasing the K value of the resin, prohibiting the use of lead and salt stabilizers, improving the impact energy of the drop hammer impact test, and partially adopting relevant advanced foreign standards. Technical indicators, adjust the ring stress of the hydraulic test, increase the system suitability test and size grouping and stereotypes inspection, etc.; PVC-U pipes and fittings for building drainage, the national standard, the specifications expanded from 40~160mm to 32~250mm, and municipal drainage Different from the pipe size, the pipe connection increases the sealing ring connection method, eliminates the classification of superior products and qualified products, and increases the pipe and pipe socket mouth size requirements.

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