This standard specifies the terms and definitions, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage and quality commitments of polytetrafluoroethylene-lined containers. This standard applies to lining vessels (hereinafter referred to as lining vessels) with metal reactors, towers, tanks, tanks and other vessels as outer shells and linings made of polytetrafluoroethylene sheet welding or winding sintering processes; the applicable design pressure PN≤ 2.5 MPa, nominal diameter DN≤3000 mm.