Sorting and summarizing common problems in fire protection acceptance of construction projects

1. Problems in fire fighting and rescue
• (1) The turning radius of the fire lane is insufficient.
• (2) The area of ​​the fire climbing operation site is insufficient, and there are tall trees between the building and the building.
• (3) Signs and markings on fire lanes and aerial work sites are not painted.
• (4) The fire rescue window settings in some public buildings do not meet the design requirements.
• (5) The vast majority of fire elevators are decorated with wood board and other combustible materials. The interior should be decorated with
other materials.
• 2. Problems with safe evacuation and refuge
• (1) The fire door closer and sequencer are not installed or installed incorrectly, and the fire door frame is not grouted(especially
the top of the steel fire door) ;
• (2) Some fire doors adopt double-child fire doors, and the child doors are not equipped with door closers and sequencers; (in principle
not allowed Use double and double doors)
Common problems in fire protection engineering (fourth edition in 2021)
• (3) The clear width of the door, evacuation door or safety exit does not meet the specification requirements; m, floor safety exits and doors 0.9m)
• (4) The independent front room and fire elevator front room adopt natural ventilation, and the effective opening area of ​​outward-opening windows does not meet
requirements. (most common)
• (5) The ground and underground of the stairwell are not separated; the top of the scissor stairwell or Connected at the bottom.
• (6) The top of the closed stairwell in the basement that uses mechanical air supply is not equipped with a fixed window of 1 square meter as required. (After the implementation of the new smoke prevention and exhaust regulations, this kind of phenomenon is the most common(most common)
• 3. Problems in building structure
• (1) The fireproof sealing is not in place when the pipeline passes through the floor slab and partition wall, especially the internal sealing of the electrical bridge is not in place. The chimney effect is likely to occur when a fire occurs; (The upper limit of the filling rate of the electrical bridge is 40% for power cables
, and the upper limit of the control cable is 50%. Good control can lay a good foundation for later sealing) There are pictures of the good work.
• (2) The fireproof partition wall in the building fails to cut off from the base of the floor to the base of the beam, floor slab or roof panel. (The top sloping roof of school projects is the most common)
• 4. Issues with fire protection facilities
• (1) Fire water supply and fire hydrant system
• (1) The outdoor water fire pump adapter failed to correctly set a permanent identification plate to indicate the water supply system,
water supply range and rated pressure; (Made according to the requirements of the atlas)
• (2) The location of the outdoor fire hydrant does not meet the design requirements(If the water company does not construct according to the design requirements, it must
consciously guide the water company to follow the design institute\’s drawings) .
• (3) The indoor fire hydrant selection does not match the design. For example, the indoor fire hydrant is designed to be a pressure reducing and stabilizing fire hydrant, but the site
all are ordinary fire hydrants.
• (4) The outlet pipe of the high-level fire water tank is not equipped with a cyclone preventer;
• (5) The effective volume of the high-level fire water tank does not meet the design requirements, and the outlet pipe cannot guarantee that the effective volume can
be fully utilized . (The minimum effective water level is 0.6 meters above the fire water pump suction bell or the outlet pipe bell. If a cyclone prevention device is installed, the minimum effective water level is 0.15 meters above the top of the cyclone prevention device.) (6) Fire protection The water pump room is not equipped with corresponding lifting facilities according to the weight of the fire water pump; (Basically no one does it
)
• (7) The fire water pump suction pipe is not designed according to the design requirements.Install a vacuum pressure gauge or vacuum gauge;
• (8) The pressure gauge and water test valve on the fire water pump outlet pipe are installed in the wrong position;
• (9) The fire water pump control cabinet does not have a mechanical emergency pump start function;
• (10) There is no red paint or red ring mark on the outside of the overhead pipeline, and the name of the pipeline and the direction of the water flow are not indicated.
• (11) The pipeline selection is incorrect and the drawing requirements are not followed. Pipes with system working pressure above 1.6mpa should use seamless steel pipes. (Almost no one cares. Nowadays, many water pump head selections are 160 meters)
• ( 12) The water pump pressure and flow test device is not set correctly.
• (13) The performance of the water pump does not meet the design requirements. (On-site water test pipe test in the pump room, the performance of the water pump cannot meet
the design requirements)
• (14) The setting of the pressure reducing valve group for water supply in the partition is unreasonable. Two pressure reducing valves are used in a group, and two sets of pressure reducing valves are used to supply water to one partition.
• (15) Overhead electrical bridges, fire water pipes, etc. are not equipped with seismic supports as required by the drawings.
• (16) The phenomenon of indiscriminate use of mechanical tees is serious. The fire water supply regulations clearly require that the main water distribution pipes (riser pipes
) and water distribution pipes (horizontal pipes) should use grooved pipe fittings and should not use mechanical tees. tee.
• (2) Automatic sprinkler fire extinguishing system
• (1) The terminal water test device or water test valve is not set up in a standardized manner or is not set up. Special drainage facilities should be set up at the test device of the fire water supply system. The diameter of the drainage riser at the water installation should not be less than DN75, and the outlet should be adopted.
• (2) The spray pump did not start during the end water test;
• (3) The setting of the pressure reducing valve group did not meet the design requirements;
• (4) The spray pump suction pipe and outlet pipe were Vacuum pressure gauge and pressure gauge are not installed.
• (5) The nozzle selection does not meet the design requirements. For example, where fast response nozzles are required, ordinary nozzles are used.
• (3) Automatic fire alarm system
• (1) The installed number of short-circuit isolators does not match the design, and the automatic fire alarm system module is not fixed;
• (2) The module should not be installed in the distribution box Inside;
• (3) Most of the detector dust covers have not been removed.
• (4) The coding addresses of various input and output modules are confusing, causing the alarm location to be inconsistent with the actual location;
• (5) Various types of exposedNo fire prevention measures have been taken for fire protection wires, such as exposed lines for emergency lighting, alarm lines in the ceiling;
• (4) Smoke prevention and exhaust system
• (1) Fan entrance, smoke exhaust branch pipe, through fire protection The smoke exhaust fire dampers in partitions and other places are not set according to the design requirements;
• (2) The mechanical pressurized air supply system and the mechanical smoke exhaust system do not use pipes for air supply and exhaust. Civil air ducts are used to supply and exhaust air, resulting in a large loss of air volume. (Smoke regulations have new requirements)
• (3) Positive pressure air supply outlet valve linkage does not meet the requirements .
• (4) The air outlet control valve of the smoke exhaust system is put into use without debugging.
• (5) There are many problems with the wall thickness and fire resistance limit of air ducts (the next step to investigate)
• (5) Fire emergency lighting and evacuation indication system
• (1) Stair emergency lighting distribution system diagram Not consistent with the original design; (on-site electricians like to play freely)
• (2) The distance between evacuation signs does not meet the requirements, and the signs in the basement are confusing.
• (3) For projects designed after March 1, 2019, emergency lighting and evacuation indicator lamps do not use Class A lamps
. (New regulations)
• (6) Ventilation and air conditioning system
• (1) Fire prevention The valve is not set as required. The setting place is: crossing the fire protection zone, crossing the room partition wall and floor of the ventilation and air conditioning room, Passing through room partition walls and floor slabs in important or fire-risk places, on both sides of deformation joints passing through fire separations, on
horizontal ducts at the junction of vertical air ducts and horizontal air ducts on each floor
br>• 5. Problems with engineering data and fire protection facility inspection
• False inspection reports, false engineering data(Industry ills)