Stainless steel pipe

　　Stainless steel pipe heat treatment generally uses non oxidizing continuous heat treatment furnace with shielding gas to conduct intermediate heat treatment and final product heat treatment during production. Because the bright surface without oxidation can be obtained, the traditional pickling process is canceled. The application of this heat treatment process not only improves the quality of steel pipes, but also overcomes the environmental pollution caused by pickling.

　　According to the current world development trend, bright continuous furnaces are basically divided into three types:

　　(1) Roller bottom bright heat treatment furnace. This type of furnace is suitable for heat treatment of large size and large batch steel pipes, with an hourly output of more than 1.0 tons. The protective gases that can be used are high-purity hydrogen, decomposed ammonia and other protective gases. Convective cooling system can be equipped to cool the steel pipe quickly.

　　(2) Mesh belt type bright heat treatment furnace. This type of furnace is suitable for small diameter thin-walled precision steel tubes. The hourly output is about 0.3-1.0 tons. The length of steel tubes can be treated up to 40 meters. It can also be used to process coiled capillaries.

　　(3) Muffle type bright heat treatment furnace. The steel pipe is installed on a continuous rack and heated in a muffle pipe. It can process high-quality small diameter thin-walled steel pipes at a lower cost, and the hourly output is about 0.3 tons or more.