Cold drawn steel pipe, cold rolled steel pipe unit is a complete set of equipment for the production of pipes by cold processing methods of cold rolling, cold drawing or a combination of cold rolling and cold drawing. It is a unit for deep processing of hot rolled pipes or welded pipes. Tube material supply; tube material preparation, including inspection, bundling, pickling, cleaning, rinsing, neutralizing, drying, applying lubricant, etc.; cold processing; finished product finishing including heat treatment, straightening, sampling, cutting head and tail, Inspection, hydraulic test, oiling, packaging, storage etc. Different products have different finishing contents. The production characteristics of the cold-processed tube unit are the characteristics of reciprocating circulation.