It 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.
First of all, let's briefly talk about the difference in manufacturing process between seamless and
seamed thin-walled stainless steel pipes. Seamless stainless steel pipe: It 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. Seamless stainless steel pipe: The round tube steel ingot is made by cold rolling, cold drawing or hot extrusion. The thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the higher the processing cost.
The difference in appearance between seamless and seamed thin-walled stainless steel pipes. Seamless stainless steel pipe: Because the processed stainless steel strip is used as the raw material, the steel pipe produced has high precision, uniform wall thickness, high brightness inside and outside the pipe, and can be sized according to the user. Seamless stainless steel pipe: Because it uses rough steel processing, the steel pipe has low precision, uneven wall thickness, low brightness inside and outside, and increased sizing cost. After multiple heating, it is very easy to have black spots on the inside and outside of the pipe, and it is not easy to remove.
The performance difference between seamless and seamed thin-walled stainless steel pipes. The seamed stainless steel pipe is formed by grinding and trimming the steel rolls precisely by precision machines, while the seamless stainless steel pipe is directly punched from the blank steel ingot, so the thickness tolerance of the seamed stainless steel pipe is smaller. The corrosion resistance of stainless steel depends on the alloy composition. The corrosion resistance of seamless and seamed pipes with the same chemical composition is the same. The steel composition of seamless pipes only meets the basic requirements of ASTM. The steel used to produce seamed pipes contains chemical compositions suitable for welding, so the strength of seamed pipes is higher.
The price difference between seamless and seamed thin-walled stainless steel pipes. Although the quality of seamed pipes is better than that of seamless stainless steel pipes, the market price is only half of that of seamless pipes.
