The cold drawn pipe is a type of steel pipe which is used in accordance with the different classification of its production process, and is mainly distinguished from the hot rolled (expanded) pipe in use. It is formed by multi-pass cold drawing in the process of expanding the diameter of the capillary tube or the raw material tube, and is usually carried out on a single-chain or double-chain cold drawing machine of 0.5 to 100T. Cold-rolled (dial) steel pipe in addition to general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, mechanical processing pipe, thick-walled pipe, small diameter plus internal die cold drawn pipe other steel pipe It also includes carbon thin-walled steel pipes, alloy thin-walled steel pipes, stainless thin-walled steel pipes, and special-shaped steel pipes.
The tolerance of the cold drawn pipe is high, the precision of the product is controlled at ±5mm, the inner and outer walls are smooth, and the surface has no oxide layer. The cold drawn finishing pipe has excellent comprehensive performance, can withstand high pressure, cold bending, flaring, flattening without cracking, no wrinkle, and can perform various complicated deformation and mechanical processing.
The promotion and application of cold drawn pipes can save steel, improve processing efficiency, reduce processing steps and equipment investment, save costs and greatly save machining time, increase production capacity and material utilization rate, and at the same time help improve product quality and reduce costs.