... Size:1/2"-24" API 5L GR.B pipeMaterial:1. CARBON STEEL: Astm a 53 ... /106/ API 5LA/B,ST37,ST35.82. Standard: Seamless – ASTM ... API 5L, ASTM A53,ASTM A671/ A672. High yield Grade: X42, X46, X52, X56, X60, X65, X70 ... , X80, PSL 1,2.High temp grade: A, B, C. Low temp grade: 1, 3, 4, 6, 7, ... 8, 9, 10, 11 And some other international standard and grade ...