What is the processing technology of stainless steel seamless steel pipe?

With the continuous development of my country's economic construction, the demand for stainless steel pipes, especially stainless steel pipes (seamless pipes), has gradually increased, which has good development prospects. Because seamless pipes have corrosion resistance, strong toughness and good formability, they have wide application value in the daily necessities industry, light industry, heavy industry and building decoration industry. So what are the processing methods of stainless steel seamless pipes? The most common processing method for stainless steel seamless pipes is the extrusion processing method. Let’s take a look at the processing methods of stainless steel seamless pipes.

　　Stainless steel seamless pipe extrusion processing method

　　By improving the vertical hydraulic perforating device, the wall thickness deviation accuracy can reach 5% ~ 7%. The extrusion press mold is simple to design, easy to design, manufacture and replace, and is suitable for enterprises to produce small batches, multiple specifications and stainless steel pipes. This extrusion device can also produce a variety of steel pipes. A set of 50MN (5000t) extrusion device can produce steel pipes with specifications of 25 to 245mm, which is more suitable for market demand than other pipe rolling devices.

　　The biggest advantage of using extrusion processing to produce stainless steel seamless pipes is that it can directly use continuous casting billets as raw materials. This can ensure safe and stable product service quality, flexible variety replacement, and you can choose to directly produce hot extruded finished products. Pipe, it can also improve the production of various special-shaped stainless steel pipes.

　　However, stainless steel pipes produced by extrusion also have an obvious disadvantage, which is the low yield. In order to improve the yield rate, foreign manufacturers have improved their production processes. For certain varieties, the production technology of pre-drilling, hydraulic punching machine hole expansion and extrusion into tubes can generally be used.

　　Cold-processed raw material pipes can adopt different production processes according to specific conditions: on a vertical hydraulic punching machine, small-sized steel pipes are directly punched and extruded with solid billets; the billets used for medium-sized steel pipes should be pre-drilled with small holes as much as possible, and the billets used for large-sized steel pipes should be pre-drilled as much as possible. Large holes should be pre-drilled, and then the steel billets used for large steel pipes are directly extruded into pipes by the extruder.

　　Stainless steel seamless pipes designed according to the cold drawing and cold rolling production and processing described in the above analysis can only be regarded as a semi-finished product, and the accuracy levels are very low. They often fail to meet the requirements that corporate users can put forward, such as Defects such as uneven pipe wall thickness, bumps, scratches, spots or pits on the internal and external surfaces require continuous grinding.

　　Today, as my country's industrialization process is gradually accelerating, there is a higher demand for seamless stainless steel pipes. Only by improving the stainless steel processing methods and technology, and comprehensively considering the company's production scale, capital investment, etc., can we choose more suitable seamless stainless steel. Only by improving the pipe production process can we ensure the production quality of seamless pipes and improve the economic benefits of the enterprise.