structural steel pipe with ASTM A106 GradeB 1.standard: ASTM JIS API DIN ... Package:export standard packag GP20,GP40 and so on4 Meterial:10# 20# 45# 15CrMo GB-T1862 GB-T18635. Application:1 ... big and small).5) Fluid pipe: Fluiding feeding.6) Structural pipe: For common structure.7) Line pipe:Carrying gas, ... , JIS, GB, DIN, ASTM, APIStandardASTM A106,ASTM A53,10#,20# and so onGradeGr.B,X42,X46,X52,X56,X60 ...