Plastic-lined composite steel pipes are steel pipes manufactured by using the thermal expansion method or diameter reduction method to line the inner wall of the steel pipe with thermoplastic pipes such as polyethylene (PE), heat-resistant polyethylene (PE-RT), and polypropylene (PP-R) according to the requirements of the medium being transported. The products are mainly used in the chemical industry and water supply.

    By the end of 2024, Youfa Group Tianjin Pipeline Technology Co., Ltd. had a total of 16 plastic-lined composite steel pipe production lines, producing a total of 220,000 tons of plastic-lined composite steel pipes in 2024.

    Tianjin Youfa Pipeline Technology Co., Ltd. (Tianjin Base) has 6 plastic-lined composite steel pipe production lines, with an annual production capacity of 100,000 tons of plastic-lined composite steel pipes.