Cold rolling, cold drawing, cold drawing and cold mixing can be used to produce cold-drawn petroleum cracking tubes. Wire drawing process, simple equipment, less investment, easy operation and maintenance, etc. But the disadvantage is that there are many intermediate steps in wood. Cold processing equipment is more complex and more investment, but it can reduce the intermediate process, improve production, high seamless steel product size and surface accuracy, especially for high precision seamless and very thin-walled seamless tubes.


Due to the restriction of roll rolling, the quantity and cost of finished product specifications can not be too large; cold rolling and cold drawing combined production process produces finished products, which shortens the processing cycle of high quality steel, reduces intermediate degreasing, heat treatment, weak, straight process, saves energy, reduces metal consumption, reduces raw material specifications and so on. Petroleum cracking tubes can be cold drawn pickling acid, hydrochloric acid, mixed acid, hydrofluoric acid, etc. Carbon steel and alloy seamless steel are suitable for sulphuric acid, and high quality carbon structural steel and alloy steel are suitable for hydrochloric acid seamlessly and precisely.