... also with good anti-corrosion performance. 1. The standard lined pipe length which we can offer:4000mm, 3000mm, 2000mm, 1500mm, ... less than 500mm is fabricated by pulling PTFE liner(pipe) into seamless steel pipe, and that more than 500mm is made by ... , ETFE, PP, PO, PE, PPS etc.Flange connection standard:(GB/T9115.4-2000PN1.0MPA). Also can based on customer requirement. steel&plastic composite pipe