Steel pipe theoretical weight calculation formula Seamless steel pipe weight calculation, spiral welded steel pipe weight calculation: kg/m = (outer diameter - wall thickness) * Wall thickness * 0.02466 The calculation method of the steel tube theoretical weight calculation formula: Weight of steel pipe = 0.25 × π × (diameter outside diameter - inside diameter squared) × L × specific gravity of steel where: π = 3.14 L = length of steel Steel weight taking 7.8 Therefore, the weight of the steel pipe = 0.25 × 3.14 × (diameter outside diameter - inside diameter squared) × L × 7.8 * If the unit of measurement is in meters (M), the calculated weight result is kg (Kg) This pipe knowledge is provided by.