Mainly used for steel pipes with high requirements on product quality and surface quality. It is realized by DX, RX atmosphere or nitrogen + enriched gas as a protective atmosphere. Our company mainly uses nitrogen + enriched gas as a protective atmosphere. Customers can customize according to their own needs, and can make oxygen-free furnaces, bright furnaces, positive annealing oxygen-free furnaces, and positive annealing oxygen-free bright furnaces.

Soften the metal before further cold working or manufacturing processes, and further reduce and improve the overall metallographic microstructure of the pipe. In the process of precision rolling or cold drawing, the pipe will become hard and brittle. In order to further cold drawing or cold rolling the pipe, it is necessary to remove the stress formed during the cold working process to restore the material to its normal state. During the annealing process, the tube is heated to a controlled temperature and held for a period of time. Through this process, the grains in the microstructure of the steel pipe are re formed into a regular stress free state, allowing for further processing and manufacturing of the pipe.