Cold drawn tube is a type of steel pipe produced through cold drawing process, which has high precision, high smoothness, and good mechanical properties.

Cold-drawn pipe

Raw material selection: Seamless steel pipes are usually used as raw materials for cold drawn pipes, which require a smooth surface, no cracks, no inclusions or other defects.
Preprocessing: Straighten the raw materials to eliminate bending and twisting of the steel pipes, ensuring their stability during the stretching process. Subsequently, lubricant is applied to the surface of the steel pipe to reduce frictional resistance during the stretching process and improve the stretching efficiency of the steel pipe.

Cold drawing processing: Place the pre treated steel pipe into a cold drawing machine, and use a stretching mold to forcibly stretch the steel pipe to the required size and accuracy. The cold drawing process usually adopts a multi pass reduction process, and the deformation of each pass is controlled within a certain range to ensure the quality of the pipe.
Finishing process: including finished product heat treatment, straightening, sampling, cutting head and tail, inspection (manual inspection and various non-destructive testing), hydrostatic testing, oiling, packaging, warehousing and other steps. These processes aim to further improve the dimensional accuracy, surface quality, and mechanical properties of the pipes.