What Is Cold Drawn Precision Tube?

Cold drawn precision tube, also known as cold drawn seamless steel pipe, refers to seamless steel tube with high precision, high finish and high strength produced by cold drawing process at room temperature. Its inner and outer wall dimensional accuracy is high and the finish is good. It is a high-quality and high-performance steel tube product. Cold drawing can significantly improve the dimensional accuracy, surface quality and mechanical properties of the pipe, and is widely used in fields requiring precise dimensions and high performance.

Classification

Cold drawn precision steel tubes include precision seamless steel tubes, precision hydraulic seamless steel tubes, cold rolled precision seamless steel tubes, high precision seamless steel tubes and precision bright seamless steel tubes.

Features

1. High precision

Cold drawn precision steel tubes have high dimensional accuracy, which can ensure accurate matching during manufacturing and installation.

2. High strength

After cold drawing, the strength and toughness of the steel tube are improved, enabling it to withstand greater pressure and load.

3. Good corrosion resistance

Cold-drawn precision steel tubes are usually made of high-quality steel, with good corrosion resistance, and can resist erosion by corrosive media such as groundwater and chemicals in the soil.

4. No oxide layer on the inner and outer walls

The cold drawing process ensures that the inner and outer walls of the steel tube are clean and free of oxide layer, thereby reducing the resistance of the fluid in the pipeline.

Manufacturing process of cold-drawn precision tubes

The manufacturing process of cold-drawn precision tubes mainly includes the following steps:

1. Preparation stage

Select suitable metal materials and cut and clean them according to requirements.

2. Pickling stage

The material is pickled to remove oxide scale and impurities on the metal surface.

3. Rust removal stage

The metal material after pickling is rust-removed to ensure the smoothness of the metal surface.

4. Coating stage

The metal material after rust removal is coated to increase the hardness and wear resistance of the metal.

5. Pressing stage

The metal material is placed in a cold drawing machine for pressing to deform the metal material into a billet.

6. Mold making stage

According to the specifications and requirements of cold-drawn precision tubes, make the corresponding molds.

7. Cold drawing stage

Put the steel billet into the cold drawing machine, and gradually thin it by stretching and rolling to form a cold-drawn tube.

8. Heat treatment stage

The tube is annealed or normalized to improve its mechanical properties and internal structure.

9. Tube cutting and trimming stage

The tube is cut and trimmed as required to meet the standards and specifications.

10. Inspection and quality control stage

The tube is inspected, including appearance, size, chemical composition, physical properties, etc., to ensure that its quality meets the requirements.

11. Packaging and transportation stage

The tube is packaged and marked for easy storage and transportation.

Application field

Cold-drawn precision steel tubes are widely used in many fields, such as automobile manufacturing, oil and gas industry, construction industry, power industry and machinery manufacturing industry. In these fields, cold-drawn precision steel tubes are used to manufacture automotive parts, pipelines, oil well pipes, building supports, telephone poles and various mechanical parts.