Tank Head Stainless Steel Dish End Stainless Steel Ellipsoidal Head Stainless Steel Spherical Head
Manholes have been shaped products, usually 600mm in diameter. The center of the manhole is generally 750mm from the floor. It is convenient for the staff to enter and exit the oil tank or ventilate during installation, cleaning and maintenance.
The manhole of the non-metal oil tank is arranged on the top of the tank, and the manhole of the metal oil tank is arranged on the bottom plate of the tank wall. Most of them are round holes with a diameter of 600mm, with a center distance of 750mm from the bottom plate, which is used by oil tank cleaning or maintenance personnel to enter and exit the oil tank. It is also called a door. Use manholes for lighting and ventilation at all times during maintenance and cleaning of oil tanks. Vertical oil tanks have 1 to 2 manholes when the capacity is below 5000m3, and 2 manholes for those above 5000m3. The installation of the manhole should be no more than 90° away from the oil inlet and outlet pipelines. When only one manhole is provided, it should be placed on the opposite side of the light-transmitting hole on the top of the tank; when two manholes are provided, one of them is located on the opposite side of the light-transmitting hole, and the other should be separated from the first manhole by at least 90 °.
One manhole should be located near the right side of the oil inlet and outlet pipes, and try to make the manhole face the closed door of the tank chamber so as to facilitate the entry and exit of the oil tank, the maintenance of the oil tank and the ventilation pipe.
Since the manhole is installed on the bottom ring of the oil tank, leakage prevention is particularly important. It is required that the joint surface of the two flanges must be flat and free of twisting. Reinforcing plates and flanges should be cut on the whole steel plate as far as possible without splicing. The flange and cover plate are processed with sealing rings, so special attention should be paid to protection during construction. 3mm thick asbestos rubber gasket is used for sealing, no cracks are allowed. When installing the manhole cover to tighten the bolts, force evenly at diagonal angles to prevent the manhole cover from deforming.
| Material |
SS304 or SS316L |
| Size |
435mm-535mm |
| Height |
75mm |
| Thickness |
8 or 10mm |
| Handle Material |
Nylon or SS304 |
| Gasket: |
Silicon, EPDM, FPM |
| Working pressure: |
0.5Bar |
| Surface Finishing |
Ra≤0.8 |
| Working Temperature: |
+ 120°C (Silicon) |
| Packing Details: |
Carton box or plywood case, or special packaging upon customer requirements |
Divide
1. Divided by the capacity of the communication tube block
According to the manhole, the specification is 360mm wide and 250mm high (in the standard six-hole pipe hole
Stainless steel manhole
Cement pipe blocks with a diameter of 90mm, referred to as standard blocks) pipe section pipe blocks or single-hole pipe pipe holes with an inner diameter of 90mm, are divided into three categories: large, medium and small.
The size of the manhole installed in the communication pipeline shall be set according to the long-term capacity of the communication pipeline. We should not only consider the capacity of communication pipelines in the current period.
2. Divided by the direction of the manhole
Manholes can be divided into straight-through manholes, three-way manholes, four-way manholes and oblique-through manholes according to the direction of manholes. For details, see Table 1 below. Among them, the oblique manhole is divided into five types: 15°, 30°, 45°, 60°, and 75°. The angle of each oblique manhole can be applied within the range of ±7.5°.
3. Divided by the load bearing capacity of the manhole overlying
According to the load bearing capacity of the manhole overlying, it can be divided into two types: steam-20 grade and steam-10 grade.
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