ASTM A106 seamless steel pipe 1.size range OD:22-530mm 2.more grades of material 3.professional for years Carbon Steel seamless PipeStandardANSI,ASTM ,API.DIN,GB.JISMaterialA106 Gr A,B,A53 Gr B,ASTM A179,A106GrB,ASTM A53GrB,St42,St45,A179,A135,A315B,A214CA333 Gr 6,A335 P11,A335 P22,TP304,TP321,TP316,TP304L,TP316L,A335 P5,ST37,ST35.8,ST52,1.0309,OD1/4"-40",13mm-1000mmWTSCH5,SCH10,SCH20,SCH40,SCH60 ...