Muffle furnace tube placed in continuous light bracket, in the muffle tube is heated, at a lower cost of processing high-quality small diameter thick wall stainless steel pipe, or more hours of production in the 0.3t. For economic use of protective gas, heating the heat source for gas, oil or electricity. Should be based on martensitic, ferritic, austenitic and duplex stainless steels of different species, choose a different heat treatment furnace and process systems. 4 is equipped with modern finishing equipment to enhance quality control quality control of stainless steel finishing process is an important part of their equipment set, the quality of nondestructive testing methods is essential.