JIS G 3443-3:2020规定了主要用于供水工程、污水工程、工业供水工程和农业供水工程的母管外表面上应用的长寿命塑料涂层的要求。

JIS G 3443-3:2020 specifies the requirements for long-life plastic coatings applied on the external surface of mother pipes used mainly for water works, sewage works, industrial water works and agricultural water works.