... SCH160,SGP,STD,XS,XXS Standard: ASTM,DIN,BS Material:ASTM A23 API anticorrosive steel pipe with good quality :anticorrosive pipeHigh quality, ... 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 ...