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Rectangular Waterproof Sewer Tank Manhole Cover
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Rectangular Waterproof Sewer Tank Manhole Cover

Manhole refers to the opening structure used for personnel to enter and exit the equipment for installation, maintenance and safety inspection. It is mainly composed of short tube section (or short tube), flange and manhole cover with handle. From the perspective of safety inspection, the number of manholes required for pressure vessels and their minimum dimensions are shown in "Inspection Holes". The manhole materials are carbon steel and stainless steel. Manholes are divided into normal pressure and pressure manholes according to pressure conditions; manholes are divided into round, oval and rectangular manholes according to their shape. Rectangular manholes are only suitable for atmospheric equipment; manholes are divided into horizontal according to installation position And vertical installation manhole; the fixing method of manhole cover includes rotating cover and hanging cover; the speed after opening of the manhole has ordinary type and quick opening type, the structure and size of the manhole are generally standardized, please refer to the relevant manual for selection or design.
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  • SINOSS

The manhole is a safety emergency ventilation device installed on the top of the storage tank. It is usually used in conjunction with fire extinguishers and mechanical breathing valves. It can not only avoid accidents caused by sudden overpressure or vacuum in the tank due to accidents, but also damage to the storage tank. It is a safety device to protect the storage tank, and it is a safety device to protect the storage tank. It is especially suitable for the vaulted atmospheric tank with nitrogen topped by the storage material. It has the advantages of constant pressure discharge, constant pressure suction, flexible opening and closing, safe fire resistance, compact structure, good sealing performance, safety and reliability.

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