Do you know what is the influence of the furnace pressure in the coils wraps when annealing?

12 December 2018 1 8K Report

Do you know what is the influence of the furnace pressure in the coils wraps when annealing? Is there any flow of hydrogen gas when purging through the coil wraps?

I'm looking for it but i just saw an amount of information simplifying the phenomenon of convection to the gas flow touching the coil in the outer part of it and the heat transfering gradient is colder in the middle of coil eye and coil outer surface.

Have you ever seen something that show if there is some hydrogen or nitrogen flow through the wraps?

Lin Xiao

When the annealing furnace is operated with nitrogen gas in the furnace tube, the pressure inside the tube will be higher than the external pressure. If it is negative pressure, the air will enter the tube to cause oxidation of the product.

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