Acceptance standard of fire water tank

Nov 11, 2022

1. The effective volume of the water tank meets the design requirements.
2. Hydrostatic pressure test of water tank meets the requirements. (Generally, there is no leakage when the water is full for 24 hours)
3. The material thickness of the water tank meets the requirements. 4. It seems that there is still one that needs to be inspected to be qualified.
The fire water tank is easy to install, but due to the uneven welding level of the construction unit, it is very important to know how to accept the fire water tank. Let's take a look.
The fire water tank is designed to supply primary fire water. In order to meet the needs of multiple regions, the fire water tank is also made of multiple materials.
The characteristics of water tanks made of different materials also have many differences. Now let's see how to choose the materials of fire water tanks?
At present, there are many kinds of materials suitable for fire water tank. Common materials include steel plate, stainless steel, reinforced concrete, glass fiber reinforced plastic, enamel steel plate, etc., but each has its advantages and disadvantages.
1、 Acceptance method of fire water tank
Close the water outlet valve and drain valve, and open the water inlet valve. It is qualified if there is no leakage or abnormal deformation three hours after the water is filled.
2、 Test method
1. Welding underframe: determine the spacing of channel steel according to the size of the water tank plate. First, fix the channel steel by spot welding, calibrate it with a level, and then weld it as a whole.
2. Fixing bottom plate: spot weld the qualified water tank bottom plate on the channel steel underframe, which is required to be fixed in the middle of the underframe.
3. Fixing side plates: spot weld the qualified water tank pressing plates on the bottom plate of the water tank in sequence. After fixing each plate, check the perpendicularity with a level ruler and a plumb bob, and then spot weld the next plate until all the side plates are spot welded.
4. Fixed cover plate Fix the qualified water tank cover plate on the side plate, and add a column between the middle of the cover plate and the bottom of the box to ensure the overall flatness of the cover plate.
5. The internal pull rod shall be fixed according to the water tank structure, and the internal and external ladders shall be installed.
6. The opening shall be made according to the position and pipe diameter shown in the drawing, and the flange short pipe of each opening shall be spot welded. The levelness and verticality of the flange shall meet the requirements.
7. The overall welding of water tank shall be carried out, and the weld shall be free of defects such as sand hole, air hole and slag inclusion.
After installation, it is also necessary to conduct sealing performance test. Wipe all welding parts of the water tank after welding with a dry towel, and then inject water to the marked capacity. After standing for 24 hours, wipe all welding parts with a dry towel. The towel should be free of water and moisture.