weight of gi square pipe: 1) Thickness:0.5-60mm 2) Outer diameter10* ... :Q195,Q weight of gi square pipe 1.size:10*10mm-600*600mm2.thickness:0.5mm-60mm4.Satndard: BS1387,EN10219,ASTM A53 ... : ISO900:2000, API5L, API5CL Product square steel pipesStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106, EN10219MaterialQ195,Q215,Q235,Q345, 20#, A53 ...