Precision stainless steel pipes include welded steel pipes and seamless steel pipes. However, when most people talk about precision steel pipes, the first thing they think of is seamless steel pipes, thinking that precision steel pipes are seamless steel pipes. Precision steel pipes also have welded steel pipes. Next, let’s talk about the difference between seamless stainless steel pipes and precision stainless steel pipes.
Seamless stainless steel pipe: Seamless steel pipes are made of round tube steel ingots through cold rolling, cold drawing, or hot extrusion production processes. Since seamless steel pipes are processed with round tube steel ingots, the steel pipes have low precision, uneven wall thickness, low brightness of the inner and outer surfaces, increased fixed length costs, and after multiple heating, it is very easy to have black spots on the inner and outer surfaces of the pipes, and it is not easy to remove them.
Moreover, the steel composition of the production of seamless steel pipes only meets the basic requirements of ASTM. Various unstable factors will be generated during the welding process, and it is not easy to weld firmly and not to weld through. Seamless steel pipes will also have metal stratification, residual stress, etc. The price of seamless steel pipes is higher than that of welded steel pipes.
Precision stainless steel pipe: Precision stainless steel pipe is welded after the steel strip is curled and formed by the unit and the mold, and the welded pipe avoids multiple heating processes during the processing, and the production process is more environmentally friendly and safer. Because the processed stainless steel strip is used as the raw material, the precision steel pipe produced has high precision, uniform wall thickness, high brightness of the inner and outer surfaces of the pipe, and can be arbitrarily sized according to customer needs.
Moreover, the precision steel pipe is formed by precisely grinding and micro-finishing the steel rolled by the precision machine, so its thickness tolerance is smaller. Under the same chemical composition, the steel used to produce precision steel pipe contains chemical components suitable for welding, so its strength will be relatively higher. Precision stainless steel welded steel pipe also has the advantages of uniform wall thickness, low residual stress, high weld strength, and good consistency.
Not only that, the quality of precision stainless steel pipe is better than that of stainless steel seamless steel pipe, but the market price is only half of that of seamless pipe.
The above is the difference between a stainless steel seamless pipe and a precision stainless steel pipe. In recent years, the development of the precision stainless steel pipe industry has been relatively good, and it has made great progress in scale, quality, production technology, etc., especially since its demand field is gradually expanding. In addition, with the increasing maturity of stainless steel welded pipe technology, many products can replace stainless steel seamless pipes, such as heat exchanger steel pipes, medium and low-pressure boiler steel pipes, etc.
Post time: Jun-18-2024