... Standard: ASTM,DIN,BS Material:ASTM A23 API anticorrosive steel pipe with good quality :anticorrosive pipeHigh quality,low price,multi ... 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 ...