The causes of fire accidents mainly include the following nine aspects:
(1) Improper fire control management. Whether it is the source of production fire (such as welding, casting, forging and heat treatment) or domestic fire (such as smoking, using stoves, etc.). ) Poor management may cause a fire.
(2) The inflammable materials are poorly managed, the warehouse does not meet the fire protection standards, and it is not classified according to the material properties. For example, putting chemicals with conflicting properties together, putting substances that burn in water in wet places, and putting different substances together to put out fires may all cause fires.
(3) Poor insulation, unqualified installation, overload, short circuit and excessive contact resistance of electrical equipment. May cause a fire.
(4) Unreasonable process layout, failure to take corresponding fire and explosion prevention measures in inflammable and explosive places, lack of maintenance and repair of equipment or poor maintenance quality may all cause fires.
(5) Violating the safety operation rules, making the equipment overpressure and overtemperature, or using flammable liquids such as gasoline in inflammable and explosive places illegally, may cause fire.
(6) Poor ventilation, flammable vapor, gas or dust in the production site reach explosive concentration in the air, which may cause fire when it meets the fire source.
(7) improper lightning protection device, lack of maintenance or no lightning protection device, lightning strikes and causes fire.
(8) Equipment and pipelines in inflammable and explosive production sites have not taken measures to eliminate static electricity, and discharge causes fire.
(9) Oilcloth, cotton yarn, oily iron filings, etc. Spontaneous combustion under certain conditions due to improper placement.
Extended data:
Combat principle
Water-based fire extinguishers, foam extinguisher, ammonium phosphate dry powder fire extinguishers and halon fire extinguishers can be selected for class A fire fighting.
Foam extinguisher (chemical foam extinguisher is limited to extinguishing nonpolar solvents), dry powder fire extinguishers, halon fire extinguishers and carbon dioxide fire extinguishers can be used for Class B fires.
Dry powder fire extinguishers, water fire extinguishers and heptafluoropropane fire extinguishers can be used to put out Class C fires.
To put out Class D fires, powdered graphite fire extinguishers and special dry powder fire extinguishers can be used, or dry sand or cast iron chips can be used instead.
Dry powder fire extinguishers, halon fire extinguishers and carbon dioxide fire extinguishers can be used to put out Class E fires. Electrified fires include fires of household appliances, electronic components and electrical equipment (computers, copiers, printers, fax machines, generators, motors, transformers, etc.). ) and the wires and cables are still charged when burning, and the fire in the ceiling, wall-hung daily lighting lamps and equipment that can automatically cut off the power supply after fire should not be included in the scope of charged fire.
To put out Class F fires, portable special fire extinguishers for edible oil or fire extinguishing device systems for kitchen equipment can be selected.