Square steel pipe 1.Size:15*15-400*400mm 2.Thickness:0.7-12mm 3.Length: less than 12m 4.MOQ: 2mt CommodityItemsStandardSteel gradeO.D.&W.T. rangeCasing/Line PipesERWAPI 5CT API 5L/ASTM A53/A106EN10255GB/T9711.1A25,A,B,X42,X46,X52,X56,X60,X65,X70S235J2H,S355J2H10#,20#,Q295,Q345,GrAGrB,GrC,Q235B,Q345B,SS4000.405’’-12.75’’X 2.4mm-31.8mmSSAW219mm-3000mmX 6mm-22mmLSAW406.4mm-1422.4mmX 6.4mm-38. ...