weight of gi square pipe: 1) Thickness:0.5-60mm 2) Outer ... L:2~11.8m 4) Material:Q195,Q weight of gi square pipe 1.size:10*10mm-600*600mm2.thickness:0 ... 11.8m4. High Quality: ISO900:2000, API5L, API5CL Product square steel pipesStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106, ... EN10219MaterialQ195,Q215,Q235,Q345, 20#, A53 A/B, A106 B/C, St37, St52Outer diameter10*10~600*600mmWall thickness0.5 ...