... Rolled,SAW.and so on.Structure type: seamless pipe,straight steel pipe,square pipe,spiral pipe ,and so on.Deaign and manufacture std: DIN ... carbon steel flangesMaterial:Rst37.2,St37.2,C22.8) ... We can supply all kinds of pipes, seamless pipe,straight steel pipe,square pipe,spiral pipe ,and so on.If you have any questions ...