... 2000,CE.Size: 1/2"-48"Material: stainless steel,carbon steel,alloy steelStandard: ANSI,JIS,BS,DIN,ASME,API,GB, ... .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)DIN2573 PN6 ... supply all kinds of pipes, seamless pipe,straight steel pipe,square pipe,spiral pipe ,and so on ...