... CARBON STEEL:Astm a 53/106/ API 5LA/B,ST37,ST35.8 Technique:Hot Rolled or Cold Rolled 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 A106, API 5L, ASTM ... , X65, X70, X80, PSL 1,2.High temp grade: A, B, C. Low temp grade: 1, 3, 4, 6, 7, 8 ...