Product:API 5l GR.B steel pipe Size:1/2''-72'' Standard:ASTM JIS DIN BS EN GB Certification:API ... Product:API 5l GR.B steel pipeSize:1/2''-72'' Specification:73*5.16Certification:APIType:seamlessThickness: 2 ... :ANSI,ASTM,API,DIN,GB,JIS.2)Material:A10GrA,B,A53,GrB,A335P11,A335P22,TP304,TP321,TP316,TP304L,TP316L, ... early reply will be highly appreciated API 5l GR.B steel pipe