Stainless steel welded pipes with a pipe diameter less than φ219mm use continuous roll forming, which is basically the same as high-frequency straight seam welded pipes. For pipes with a diameter greater than φ219mm, pressure forming or spiral welding is used. Capillary tubes whose diameter is less than φ4.76mm are made by post-weld drawing method.

Improving the surface quality of stainless steel pipes includes improving the surface morphology and structure and reducing the number of interlayers. Common surface treatment methods currently on the market include mechanical drawing, mechanical grinding, polishing and burning.

Usually, before stainless steel pipes are used as water supply pipes, there will be a passivation treatment process during the processing process.

In the use of pipes, plastic-lined steel pipes and stainless steel pipes are relatively common. Their performance is outstanding and each has its own merits.

When stainless steel pipes are processed by bright solution treatment, in addition to paying attention to the influence of factors such as protective atmosphere, processing temperature, and cooling rate, it is also necessary to do a good job in the process of bright solution treatment.

In various actual use situations, the wall thickness of stainless steel water supply pipes is not exactly the same. There are many factors that affect the adjustment of wall thickness, such as mechanics, corrosion resistance, wear resistance, economy, connection methods, etc.

At present, stainless steel industrial welded pipes are used more and more widely in the stainless steel application market at home and abroad.

Stainless steel welded steel pipe is a kind of pipe welded by stainless steel plates or strips after being curled and formed. Its production process is simple and efficient, with low cost and many varieties and specifications, but its strength is generally lower than that of seamless steel pipes. However, with the continuous advancement of production technology, the quality of stainless steel welded pipes is getting better and better, replacing the original seamless steel pipes in many aspects.

For stainless steel production plants, product production equipment is the key to their survival. The quality of the equipment also determines the quality and performance of the products.

Before stainless steel pipes enter the polishing process of the polishing machine, it is necessary to ensure that the quality of the stainless steel pipes used reaches certain standards.

Among the 400 series stainless steel, the application range of 409L stainless steel coil is second only to 430 stainless steel.

The stainless steel pipe in the passivated state will still have a certain degree of reactivity because its passivation film is always in a dynamic equilibrium state of dissolution, repair and re-passivation.