Comprehensive Analysis of Fire Acceptance Content of Construction Engineering 1.Main Points of Outdoor Fire Control in Residential Areas 1.1 Outdoor Fire Control Contents in Residential Areas Outdoor low-pressure fire-fighting pipe network; Outdoor fire hydrant, fire fighting water crane; High-pressure fire control pipe network (for indoor fire control); Fire pool and fire intake; Outdoor pump house; Fire pump combiner. 1.2 Outdoor fire pipe network 1.2.1 Low Pressure Fire Fighting Pipeline Network For outdoor hydrant water supply or low pressure spray water supply. When the municipal tap water pressure is not less than 0.1 MPa, it can be used in conjunction with the tap water network. When there is no municipal tap water or the water pressure is less than 0.1 MPa, the fire pump is used to pressurize the water supply. Circular pipe network must be set up. 3 m away from the building foundation. Material: cast iron pipes for water supply, galvanized steel pipes for inside and outside, welded pipes for strengthening anticorrosion. There are two suction pipes for fire pump, and two connection pipes for fire hydrant pump outlet pipe and fire pipe network. The spray pump outlet pipe has two water supply pipes in front of the alarm valve. Pipe laying Connection: fork, clamp, welding. Depth of burial: 150 mm below freezing line. Laying: On the original soil layer, fine soil is backfilled and compacted separately. In case of collapsible loess, sandstone cushion and concrete cushion should be made. Water pressure test, flushing. 1.2.2 High Pressure Fire Fighting Pipeline Network Water supply for fire hydrant or sprinkler system in the upper interior of high-rise buildings.When the lower part is combined with the upper part, the lower part of the equipment should be decompressed, and the pressure of the bolt mouth should not be higher than 50 mH 2 O 2. Setting up ring pipe network. When there is no municipal tap water or the water pressure is less than 0.1 MPa, the outdoor hydrant can be used with the indoor high-pressure pipe network. The pressure of the hydrant mouth should be reduced by no more than 50 mH2O. Fire hydrant and sprinkler system are generally divided into two casing networks. There are two suction pipes for fire pump, and two connection pipes for fire hydrant pump outlet pipe and fire pipe network. The spray pump outlet pipe has two water supply pipes in front of the alarm valve. It is not less than 3 meters from the building and less than 4 meters from the collapsible loess area. The pipeline is buried 150 mm below the freezing line. Pipe material and installation requirements are the same as low pressure pipe network. 1.3 Outdoor fire fighting equipment and structures 1.3.1 Outdoor fire hydrant, fire fighting water crane Underground fire hydrant, 2 groups, SN100 + SN65. The distance is less than 120m and the maximum service radius is 150m. Fire water crane, according to local requirements, there is no uniform regulation. Heat preservation well cover, well cover has obvious signs. 5 meters away from the building and within 15 meters. 1.3.2 Fire pool Include fire water: hydrant 2 hours (some 3 hours), spray 1 hour. The total amount of water used for indoor and outdoor fire fighting. The amount of water inflow during fire extinguishing can be deducted, but two intake pipes need to be connected. Establish manholes and intakes, which are 15 meters away from buildings. It can be set indoors, but the intake is set outdoors (15 meters). There should be 2 ventilation holes and repair holes at the inlet. The pump axis is lower than the normal water level of the pool and the suction outlet is lower than the lowest water level. Freeze-proof measures and rainwater backfilling measures should be taken. 1.3.3 Fire Pumping House Fire pump and sprinkler pump, one spare (eligible can be used together). There are two suction pipes in the pool. There are two water supply pipes in fire hydrant network and two water supply pipes in front of automatic sprinkler alarm valve. The inlet and outlet of the pump are equipped with valves and pressure gauges, and the outlet is equipped with single-flow valves. The water intake of the pump is below the normal water level of the fire pool, and the water intake is below the lowest water level. The head and flow of the pump meet the requirements. Linking with fire control room, hydrant pump and spray pump can start automatically, and can start manually and directly remotely. 1.3. 4 Main ite

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