... :2000,CE.Size: 1/2"-48"Material: stainless steel,carbon steel,alloy steelStandard: ANSI,JIS,BS,DIN,ASME,API ... 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 ... your valuable inquiry and questions. stainless steel API 3PE anticorrosive steel pipe with good quality