If you want to get smaller and better quality seamless pipe, must be used cold rolling, cold drawing or a combination of the two methods. Cold rolling is usually carried out on a two-roll mill where the steel pipe is rolled in a ring-shaped bore formed by a variable cross-section round hole and a stationary tapered head. The cold drawing is usually carried out on a single chain or double chain type drawing machine of 0.5 to 100T.

High-quality carbon structural steel cold-drawn seamless pipe, mainly with 10, 20, 35, 45 steel, in addition to ensuring the chemical composition and mechanical properties to do water pressure test, curling, flaring, flattening test.

Cold drawn seamless steel pipe Weight calculation formula: (diameter - wall thickness) * Wall thickness * 0.02466 = kg / m (weight per meter)