Product:API 5l GR.B steel pipe Size:1/2''-72'' Standard:ASTM ... BS EN GB Certification:API Product:API 5l GR.B steel pipeSize:1/2''-72'' Specification:73*5.16Certification ... ANSI,ASTM,API,DIN,GB,JIS.2)Material:A10GrA,B,A53,GrB,A335P11,A335P22,TP304,TP321,TP316,TP304L,TP316L ... ,SCH160,XXS.4)Usage:Structure,use,water,transport,building,machinery,traffic,aviation,oil development ect.5)Tensile strength:390MPA ...