... .6JISSEAMLESSSTPL380, STPL450, STPL690ASTMWELDEDA671-CC60, CC65, CC70 etc..ALLOY STEEL PIPEASTM/ASMESEAMLESSA/SA335-P1, P5, P11, P12, P22, P91JISSEAMLESSSTPA-12, 20, 22, 23, 24, ... 25, 26ASTMWELDEDA691- 1 1/4CR, 2 1/4CR, 5CR, 9CR etc..STAINLESS STEEL ... advance, the balance against with the copy of B/L) seamless alloy steel pipe ASTM A335 P11