... etc3. Material:1) CARBON STEEL: ASTM A106 GR. B & C/ ASTM A53 GR. B & C/, ASTM A333 GR. 3/6 & API-5L-GR ... . B/X42/X46/X52/X60/X65/X75 & ASTM A 671 / ... X65, X70, X80, PSL 1,2.High temp grade: A, B, C.Low temp grade: 1, 3, 4, 6, 7, 8, ... and seals, or as per customers' requirements11) Payment: L/C or T/T in Advance after negotiating with customers Please ...