The CJ/T 493-2016 "High-performance rigid polyvinyl chloride (PVC) pipes and connectors for water supply" standard specifies detailed requirements for materials, product specifications, requirements, test methods, inspection rules, signs, Encasement, transportation and storage of high-performance rigid polyvinyl chloride (PVC) pipes and connectors for water supply. The standard applies to outdoor buried and pipe gallery water supply systems with a water temperature of not more than 45 ° C. It is designed to ensure the mass and safety of pipes and connectors. The standard refers to a number of national standards, covering the density of plastic pipes, thermal performance, pressure performance, chemical performance, etc., as well as pipe size determination and durability testing. The implementation of this standard helps to regulate and improve the mass level of rigid polyvinyl chloride (PVC) pipes and connectors used in water supply systems.