1. From the appearance, stainless steel pipes are generally white without embroidery. Ordinary seamless steel pipe surface will have floating embroidery or reddish brown.

Stainless steel is corrosion-resistant and has a much better finish than ordinary steel pipes. etc

2. Seamless steel pipe is drawn by seamless technology, and the material can be ordinary 20 # steel or stainless steel;

Ordinary stainless steel pipes are generally welded by process and made of stainless steel.

Stainless steel seamless pipe is a kind of long steel with hollow section and no seam around it. The thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, the higher the processing cost. The technology of this product determines its limited performance. Generally, the precision of seamless steel pipe is low: uneven wall thickness, low brightness inside and outside the pipe, high length cost, and pits and black spots inside and outside the pipe are not easy to remove; Its detection and shaping must be done offline. Therefore, it shows its advantages in high pressure, high strength and mechanical structure materials.

Welded steel pipe, short for welded pipe, is made of rolled steel or steel strip, which is formed by unit and die. Welded steel pipes have simple production process, high production efficiency, many varieties and specifications, and less equipment investment, but their strength is generally lower than that of seamless steel pipes. Since 1930s, with the rapid development of high-quality strip continuous rolling production and the progress of welding and inspection technology, the weld quality has been continuously improved, and the varieties and specifications of welded steel pipes have been increasing. Seamless steel pipes have been replaced in more and more fields, especially in heat exchange standby pipes, decorative pipes and medium and low pressure fluid pipes.