Stainless steel pipe is a tubular product made of high-quality stainless steel material, which has the advantages of corrosion resistance, high temperature resistance, and high compressive strength. According to different manufacturing processes, stainless steel pipes can be divided into stainless steel seamless pipes and stainless steel welded pipes. Stainless steel pipes are widely used in industries, construction, chemical industry, medical equipment and other fields, and are an important metal material. The main materials of stainless steel pipes are 304, 316, 321, etc., each material has different characteristics and applicable fields.