The standard for plastic-coated steel pipes used in tap water supply is CJ/T120-2016, "Plastic-Coated Composite Steel Pipes for Water Supply." The hygienic performance requirements for plastic-coated composite steel pipes in this standard include: 1. Scope. This standard applies to plastic-coated steel pipes used for transporting drinking water. Other diameter fluid transport pipes should refer to this standard for compliance. 2. Normative Application Documents. The relevant normative standard for drinking water is: GB/T 17129, "Safety Evaluation Standard for Drinking Water Transmission and Distribution Equipment and Protective Materials." 5.3.1 The hygienic performance of polyethylene coatings shall meet the requirements of GB/T 17129. 4.4.1 The hygienic performance of epoxy resin powder shall meet the requirements of GB/T 17129. 6.3.1.6 Hygienic Performance: The hygienic performance of plastic-coated steel pipes used for transporting drinking water shall meet the requirements of GB/T 17129. In 2007, the Ministry of Health issued a notice regarding the "Classification Catalog of Products Related to Drinking Water Hygiene and Safety," which has now been updated to the 2011 version. This catalog standardizes the classification and scope of products related to drinking water hygiene and safety. Article 2, "Protective Materials," explicitly lists epoxy resin coatings, polyester coatings (including alkyd resins), acrylic resin coatings, and polyurethane coatings as protective materials for drinking water products in the "Classification Catalog."