The Roughness requirements of the beer brewing tanks

Feb 18, 2017
helen

7998
beer fermentation tanks

The Roughness requirements of the beer brewing tanks

Most of the beer brewing tanks today are made by sanitary stainless steel. As we know the smoothness inside of the tank is very important for beer brewing, which mostly shows by Roughness.

Especially the bottom of the tank and discharge arm, the roughness must be smaller, in case the bacteria survived. Generally the roughness of the welding line must to reach 0.4-0.5um after polishing.

The diameter of the yeast at about 6-10um, it cannot hide inside of the material. But for bacteria, its size is only 0.7-4um, it may survived inside of the welding line if we cannot make it smoothly, then the beer may be polluted.

So the polishing is very important during the manufacturing of beer brewing tanks. We Tiantai generally adopted acid pickling and passivation which will remove the welding oxygen firstly and then form a protection layer on the tank surface. The accuracy of the tank will reach 0.2-0.4um.