Alexander Li · Fire protection expert

Expert Q&A

• What are the fire protection system design requirements for homestays?I am fire safety expert Alexander Li. As high occupancy accommodation premises, homestays…
• What are the code requirements for the power distribution design of fire pumps?This is a highly professional question. As the "heart" of a building's fire protection sy…
• Key points for fire pump power distribution design?According to GB 50016 2014 (2018 Edition) Code for Fire Protection Design of Buildings an…
• Maintenance verification – Registered user question: Hotel fire pump power supply requirementsI am fire protection expert Alexander Li. The fire water pump is the "heart" of a hotel's…
• The water pressure and flow rate at the most unfavorable point of the indoor hydrant system do not meet the requirements of GB 50974, and effective firefighting cannot be achieved in the event of a fire.【Cause】Fire pump head selection is too low; pipe network diameter design is too small; hy…
• After the ceiling is finished, sprinkler heads are blocked or misaligned, resulting in insufficient coverage area and impaired fire-extinguishing effectiveness.【Cause】The interior design was not coordinated with the sprinkler head layout; sprinkler …
• Insufficient positive pressure supply air in the smoke-proof stairwell; during a fire, smoke enters the evacuation stairwell and threatens escape safety.【Cause】Unreasonable supply air outlet layout; fan selected with insufficient air volume; …
• The linkage logic of the automatic fire alarm system was not correctly programmed, so fire protection equipment cannot start automatically in the event of a fire.【Cause】The linkage logic table in the design documents is incomplete; programming was not…
• 【Cause】After the data center gas fire suppression system discharges, the extinguishing agent concentration is insufficient, failing to effectively extinguish the fire, and the HF decomposition products corrode precision equipment.【Cause】The protected zone openings were not fully sealed, causing extinguishing agent los…
• After the fire pump automatic inspection starts, the pressure gauge shows no reading and the pump delivers no water, resulting in the fire protection pipe network being without water for a long time.【Cause】Air trapped in the suction pipe causes air binding; insufficient submergence depth…
• The water motor gong of the wet alarm valve does not operate or its sound is insufficient; after the sprinkler system activates, it fails to effectively emit an alarm signal.【Cause】The strainer at the water motor gong inlet is clogged; insufficient water pressure…
• After the 280°C smoke exhaust fire damper fuses and closes, the signal is not fed back to the fire control room, so the damper status cannot be determined during a fire.【Cause】The valve limit switch is not securely installed or the wiring is loose; the limit…

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