Diagram 15S919 (revised in 2118) of Technical Specification for Fire Water Supply and Hydrant System 4.3.7 The fire pool for storing outdoor fire water or for taking water from fire engines shall meet the following requirements:

1. The fire pool shall be provided with a water intake (well), and the water absorption height shall not be greater than 6.1m.

2. The distance between the water intake (well) and the building (except the water pump room) should not be less than 15m.

3. The distance between the water intake (well) and structures such as Class A, B and C liquid storage tanks should not be less than 41m.

4. The distance between the water intake (well) and the liquefied petroleum storage tank should not be less than 61m, and it can be 41m when protective measures are taken to prevent radiant heat.

Extended information:

Precautions:

Location and size of fire water intake. When determining the position of the fire water intake, there are two situations according to the actual position of the fire water pool. A hole with a diameter of 1.1~1.2 meters is directly reserved on the roof of the fire water pool by the structure for the fire truck to take water. However, this requires that the fire water intake must be located at a certain distance from the protected building, which is generally not less than 5 meters.

when this distance cannot be met, a water intake well is usually set at a position that meets the requirements of the code and is convenient for fire engines to enter and exit, and a DN311 pipe is connected to the bottom of the fire pool at the bottom, and the water intake well is inclined at an appropriate slope. The size of the water intake well shall not be less than the water output of the largest pump on the fire truck for 3 minutes, and generally it shall not be less than 3m3.

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Baidu Encyclopedia-Technical specification for fire water supply and hydrant system