Party Management of weight formula: 4 x thickness x (side length - wall thickness) x 7.85 where both sides and a wall thickness in millimeters, Gansu square tube, directly to the values ??into the above equation, galvanized pipe, It is obtained per meter square tube weight in grams. Such as 30 x 30 x 2.5 mm square tube, according to the above formula can calculate their weight per meter: 4 x 2.5 x (30-2.5) x 7.85 = 275 x 7.85 = 2158.75 grams, or about 2.16 kg when the thickness and When a side are in millimeters, square tube price, 4 x thickness x (side length - wall thickness) is calculated by volume per meter square tube length, in cubic centimeters, multiplied by the proportion of iron per cubic meter cm 7.85 g, stainless steel pipe, is obtained per meter square tube weight in grams. Rectangular Pipe curvature per meter shall not be greater than 2mm, the total curvature is not greater than 0.2% of the total length. Rectangular Pipe curvature per meter shall not be greater than 2mm, the total curvature is not greater than 0.2% of the total length. Gansu square tube, around the steel joint, galvanized square tube from the Tianjin Steel Trade Co., Ltd. Mastery. Gansu square tube, around the steel joint, galvanized square steel pipe Tianjin Tongda Trade Co., Ltd. (www.tjtdgl.com) (www.tdglgt.com) this year introduced a new upgrade, the above picture is for reference only, please dial this Tel pages or pictures on obtain the latest information, contact: Yanjing Li.