GB/T 20221-2023 《Unplasticized poly(vinyl chloride) (PVC-U) pipes for non-pressure buried drainage and sewerage systems》 Related products

GB/T 20221-2023 "Rigid polyvinyl chloride (PVC) (PVC-U) pipes for sewage and drainage without pressure" standard specifies the requirements for sewage and drainage pipe systems made of hard polyvinyl chloride (PVC) (PVC-U) mixtures by extrusion molding. This standard covers the requirements of pipe materials, classification, Appearance, size specifications, physical and mechanical properties, hydrostatic strength, sanitary performance and system suitability, and describes the corresponding test methods. Applicable to sewage and drainage pipe systems buried in buildings or outdoor floors, including industrial, civil and special purpose fields.