Main material : CARBON STEEL PIPE : ASTM A120 , A53 Gr A , A53 Gr B , A106 B / C , API 5L / B , STB35 , STPT42 , HIGH TENSILE CARBON STEEL PIPE : API 5L X42 , X46 , X52 , X56, X60 , X65 , X70 , X80 ALLOY STEEL PIPE : A335 GR P1,P2,P5 , P7, P9 , P11, P12 , P22 ,P23, P91, P92, STPA12 ,STPA13, STPA20, STPA22, STPA25 P122,P911 LOW TEMP PIPE : A333 GR 1 , GR 3, GR 4, GR 6, GR 8 , A200, A249, A269 STAINLESS STEEL PIPE : A312 GR TPXM-19,TPMX-10,TPMX-11,TPMX-29, A312 GR 304 , 304H,304L , 316 ,316H,316L,321,321H,347,347H , 310S CARBON STEEL TUBE : A179 , A192 , A210A1 ,A210C A214 , A519 , A512 ,STPT38 ALLOY STEEL TUBE : A209 , A213-T5 ,T9, T11, T12 DUPLEX STEEL PIPE : A790 UNS S31803 , S32750, S32760 A335 GR P1,P2, P5,P5b, P5c, P9, P11, P12, P15, P21, P22, P23, P91, P92 NICKEL ALLOY , MONEL , INCONEL , ALLOY 20 , DUPLEX, TITANIUM