Stainless steel tank is composed of tank body, tank cover, agitator, support, transmission device, shaft sealing device, etc. According to the customer's production process, cleaning ball, liquid level meter, manhole (hand hole), thermometer, pressure gauge and other accessories can also be added. Among them, the manhole (hand hole) is installed on the top of the stainless steel tank safety emergency ventilation device, but also for the installation, removal, cleaning and maintenance of stainless steel tank internal devices.

Hand hole and manhole structure is basically the same, is composed of a cylinder section, flange, cover and handle. So, when customizing stainless steel tanks, how should you choose the manhole on the tank?

The size of both the manhole and the handhole can be set according to the size of the tank. The diameter of the handhole is generally 150-250mm, and the nominal diameter of the standardized handhole is DN150 and DN250. The size of the handhole diameter needs to meet the needs of workers wearing gloves and holding the hand of the tool can pass flexibly. Then the size of the manhole has 400-800mm, generally when the stainless steel tank diameter of more than 900mm, should be opened manhole. General manhole has two handles, stainless steel tank selection should be a comprehensive consideration of the nominal pressure, nominal diameter (man, hand hole nominal pressure and flange nominal pressure concept. Nominal diameter refers to the nominal diameter of its simple section), working temperature and the structure and materials of the man and hand holes and other factors. Usually stainless steel tanks can be based on operational needs, in this consideration of the manhole cover diameter is larger and heavier, so the choice of horizontal hanging cover manhole, manhole cylinder axis vertical installation.

The choice of manhole and hand hole on the stainless steel tank can be selected according to the production conditions with pressure type or atmospheric pressure type, manhole and hand hole shape oval, round, square and other shapes, according to the model specifications YAA, YAB, YAC, YAD, YAF and other (hand) manhole models.