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1. High precision: Through cold drawing processing, the steel pipe has high dimensional accuracy and uniform wall thickness, which can meet high requirements for processing and use. 2. High strength: Cold drawn seamless steel pipes have high strength and are ideal materials for manufacturing high-pressure equipment and mechanical parts. 3. Surface smoothness: The surface of the cold drawn steel pipe is smooth and flawless, reducing surface defects and making it more suitable

1. Raw material preparation: High quality steel billets are selected as raw materials, and after passing preliminary inspection, they enter the production line. 2. Hot rolling: Steel billets are rolled by a rolling mill at high temperatures to form capillary tubes. 3. Acid washing: Remove oxide scale and impurities on the surface of the capillary tube through acid washing. 4. Cold drawing: Cold drawing the pickled tube to gradually reduce the thickness of the tube wall, impro

Seamless steel pipes are required to have excellent wear resistance, machinability, heat resistance, and high strength and toughness of thick walled seamless steel pipes. In addition, some seamless steel pipes may decompose gases such as hydrogen chloride, hydrogen fluoride, and sulphur dioxide in a molten state, so the mould must have a certain degree of corrosion resistance. At present, domestic seamless steel pipe users generally choose 4Cr13 stainless steel. This study in

The control of steel pipe wall thickness is a difficult point in steel pipe production, and measures to improve wall thickness accuracy in production mainly include the following aspects: 1. Tube billet heating Heating should be uniform, and rapid temperature changes are prohibited. Each temperature rise and fall should be kept steady and slow, with a maximum rise and fall temperature not exceeding 30℃. 2. Centering roller Confirm whether the centering roller is installed pro

According to different production methods, it can be divided into hot-rolled pipes, cold-rolled pipes, cold drawn pipes, extruded pipes, etc. The biggest difference between cold drawn seamless steel pipes and hot-rolled seamless steel pipes is that the precision of cold drawn seamless steel pipes is better than that of hot-rolled seamless steel pipes. The general precision of cold drawn seamless steel pipes is around 20 threads, while the precision of hot-rolled seamless stee