Since the 1930s, with the rapid development of continuous rolling production of high-quality strip steel and the advancement of welding and inspection technology, the quality of welds has continued to improve, and the varieties and specifications of stainless welded steel pipes and steel pipes have increased day by day, and are used in more and more fields, especially It has replaced seamless steel pipes in heat exchange equipment pipes, decorative pipes, medium and low pressure fluid pipes, etc.Stainless welded steel pipe is a pipe made of stainless steel plate as raw material and processed through a series of production processes. The production process of welded steel pipes is simple, the production efficiency is high, there are many varieties and specifications, and the equipment investment is small, but the general strength is lower than that of seamless steel pipes. Compared with ordinary black steel pipes, galvanized pipes, aluminum-plastic pipes, etc., stainless steel pipes have a smooth and smooth surface without defects such as iron oxide scales and holes. They have excellent corrosion resistance, high temperature resistance, non-toxicity, and pressure resistance.