Stainless steel pipe is an economic cross-section steel is an important product in the iron and steel industry, typically accounts for about 8% to 16% of the total steel, it is a very wide range of applications in the national economy. Because the tube has a hollow cross-section, and thus most suitable liquids, gases and solids pipeline; simultaneously compared with the same weight of round sectional coefficient of the steel pipe is large, torsional bending strength, so it became a variety of mechanical and architectural structures on the important material.