Two problems in the design of water fire extinguis

2022-09-21
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Talking about two problems in the design of water fire extinguishing system

recently, several problems have been discussed more by colleagues on the water supply and drainage professional forum station. I also actively expressed some personal views and had some exchanges with some colleagues in practical work. Here, I want to write some of my thoughts and exchange experiences for colleagues' reference and exchange

first, the first question is whether some multi-storey public buildings are equipped with indoor fire water supply

for example, an ordinary business office building (three floors) has only public toilets, and the building volume is greater than 5000 cubic meters and less than 10000 cubic meters. Is it necessary to arrange an indoor fire hydrant system? One opinion is: according to 8.4.1 of the building code, the following buildings should be equipped with indoor fire water supply: v. other civil buildings such as teaching buildings with more than five floors or a volume of more than 10000m3. The building belongs to other buildings with a volume of no more than 10000 m3, so there is no need to set indoor fire hydrant system and other fire extinguishing systems. The second opinion is: according to article 8.4.2 of the building code, the following buildings may not be equipped with indoor fire protection, which has been widely concerned and valued by sample designers, molding and processing enterprises and product manufacturing suppliers: second, there is no production and domestic water supply pipeline indoors, and the surgeon may want to replace the vertebral body with loadable artificial materials. The outdoor fire water is from the building with a storage tank and a building volume of no more than 5000 m3. The building has indoor domestic water supply pipelines with a volume of more than 5000 m3, so indoor fire hydrants should be set. The two opinions have been debated and inconclusive. It is certain that different fire departments across the country also have different opinions

for this problem, I have also consulted with several old engineers of drawing review companies. Their opinion is to set more, which also means to be strict. However, my personal view should be flexible and determined according to the fire risk, specific building functions and volume, and municipal pipe pressure. In the case of community pipes, general buildings have indoor domestic water supply pipelines. If indoor fire hydrants are required, sometimes it will inevitably bring inconvenience to the project, and the project cost will be high, exceeding the budget of Party A. Galaxy Securities released a research report on the fuel cell industry. In the case of community management, it is convenient to set up indoor fire hydrants. If the municipal water pressure is enough, it is usually high pressure, no problem, just set it. However, in most cases, the municipal water pressure can not meet the requirements of enriching the water column. A water pump should be set to pressurize to form a temporary high fixed slider position pressure water supply system. According to article 8.6.3 of the construction regulations, "buildings with temporary high-pressure water supply systems should be equipped with fire water tanks or pneumatic water tanks, water towers", and in many parts of the country, fire pumps are not allowed to directly suck water from municipal pipes. In this way, it is necessary to set up water pumps, water tanks and pools. Even if it is inconvenient to set up water tanks in some buildings, it is necessary to set up pneumatic water tanks, which brings trouble to the project construction and leads to a sharp rise in the cost. This is the focus of the contradiction

according to articles 8.4.1 and 8.4.2 of the construction regulations, this situation is exactly a two-way situation. Generally speaking, the fire risk is medium. Therefore, I suggest that in the next revision of the specification, similar situations can be listed separately, and it is required to set up a fire hydrant and water pump combiner instead of a water pump, water tank and pool, so that everyone can easily accept it

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