Stainless steel tube is a hollow circular steel strip, is an economic cross-section steel, the steel industry is an important product, which according to the mode of production is divided into two major categories of seamless and welded pipe, divided by material ordinary carbon steel pipe, steel pipe, steel pipe and other types of bearings, safe, reliable, environmental health, affordable, anti-air, steam, water and other corrosive medium and weak acid, alkali, salt and other corrosive chemical etching medium, in life is widely used in petroleum, chemical, medical, food, light industry, machinery and instruments and other industrial pipes and mechanical structural components.