What are the manholes and hand holes in the tank

Mixing tank, liquid tank, reaction tank and many other tanks are provided with manholes or hand holes, manholes and hand holes are an accessory on the tank, the use of quick-opening structure, can be applied to stainless steel tanks and containers. The setup of manhole and hand hole is to facilitate the installation, disassembly, cleaning and maintenance of the inside of the tank. When the inside of the tank needs to be cleaned or repaired, the staff can probe into the hand hole to repair the tank. The manhole is usually used for the larger type of tank, which allows the staff to enter the inside of the tank for maintenance.

The size of the manhole and hand hole can be set according to the size of the tank, the diameter of the hand hole is generally 150-250mm, and the diameter of the hand hole needs to meet the worker's flexibility when wearing gloves and holding the tool. The size of the manhole has 400-800mm, the size of the manhole should not only meet the flexible passage of the staff, but also facilitate the passage of the mixing shaft and the agitator in the mixing tank. Generally, when the diameter of the tank is greater than 900mm, the manhole should be opened.

The use of manholes and hand holes in the inspection, maintenance, cleaning inside the tank brings great convenience, manholes and hand holes can be selected according to the actual production of pressure type or atmospheric pressure type, manholes and hand holes have oval, round, square and other shapes, of which circular manholes are convenient to manufacture, and more widely used.