The general production process of steel pipe can be divided into cold drawing and hot rolling. The production process of cold rolled pipe is more complex than hot rolling. If the structure is required, it is generally achieved by controlled rolling and cooling. In appearance, cold rolled tubes are shorter than hot rolled tubes. The wall thickness of cold-rolled tubes is generally smaller than that of hot-rolled tubes, but the surface is brighter than that of thick-walled tubes, the surface roughness is not high, and the diameter is free of burrs.

The production process of steel pipe: round tube billet heating, punching, annealing, acid pickling, cooling, straightening, hydraulic pressure test, storage.

Pipes are generally made of carbon steels such as 10, 20, 30, 35, 45, low-alloy structural steels such as 16Mn, 5MnV, or carbon steels such as 40Cr, 30CrMnSi, 45Mn2, and 40MnB, which are hot rolled or cold-rolled. Seamless pipes made of low-carbon steel, such as 10 and 20, cold-drawn profile steel manufacturers pointed out that they are mainly used for fluid transportation pipelines. Seamless steel pipes are made of medium carbon steel such as 45 and 40Cr, and are used to manufacture mechanical parts such as stress parts of automobiles and tractors. Under normal circumstances, the strength and flattening test of the pipe must be ensured. Hot-rolled steel pipes are delivered under hot-rolled or heat-treated conditions; cold-rolled are carried out under heat-treated conditions.