This part specifies the definitions, classifications, specifications and models, technical requirements, test methods, inspection rules and standards of portable fire extinguishers.
This part is applicable to the portable fire extinguishers.
2 Normative References
The following documents contain provisions which, through reference to this part of GB 4351, constitute provisions of this part. For dated references, subsequent amendments or revisions (excluding amendments) to any of these publications shall not apply to this Part. However, the parties reaching an agreement according to this Part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated. For undated references, their latest editions shall be applicable to this Part.
GB/T 3864 Industrial Nitrogen
GB 4351.2 Portable Fire Extinguishers-Part 2: Requirements for Seamless Steel Cylinders of Portable Carbon Dioxide Fire Extinguishers
GB/T 4351.3 Portable Fire Extinguishers-Part 3: Regulations
GB 4396 Carbon Dioxide Extinguishing Agents
GB 5099 Steel Seamless Steel Cylinders (GB 5099-1994, neq ISO 4705: 1983)
GB 8335 Special Threads for Gas Cylinders
GB/T 11640 Seamless Aluminum Alloy Gas Cylinder
GB 4066.1 Fire extinguishing media Part 1: BC powder (GB 4066.1-2004, ISO 7202: 1987, NEQ)
GB 4066.2 Fire extinguishing media Part 1: ABC powder (GB 4066.2-2004, ISO 7202: 1987, NEQ)
GB 15308 General Specification for Foam Extinguishing Agents
GB 17427 Aqueous Film Forming Foam Extinguishing Agents
GB 17835 General Specification for Water Extinguishing Agents
3 Terms and Definitions
For the purposes of this part, the following terms and definitions apply.
3.1
portable fire extinguisher
portable fire fighting appliance which can discharge the fire extinguishing agent in it under the effect of internal pressure to put out the fire.
3.2
effective discharge time
time from the commencement of discharge of the extinguishing agent at the nozzle to the gas point of the discharge steam in the state of full opening of the discharge control valve of the portable fire extinguisher (hereinafter referred to as extinguisher).
3.3
complete discharge
in the state of the full opening of the control valve, when internal pressure is equal to external pressure during the discharge of the fire extinguisher, it is called complete discharge.
3.4
bulk range
When an fire extinguisher sprays to 50% of the extinguishing agents, the distance between the farthest spray flow and the nozzle of the fire extinguisher.
3.5
delayed-action time of discharge
duration from the opening or the available corresponding opening state of the control valve of the fire extinguisher to the spraying of the extinguishing agent from the nozzle.
3.6
rate of residual extinguishing medium
upon the complete discharge of the fire extinguisher with rated filling, the mass percentage of the internal remaining quantity of the extinguishing agent to the filling volume of the fire extinguisher prior to discharge.
3.7
service pressure (Ps)
the internal balance pressure after the fire extinguisher filled and pressurized as rated is placed at 20℃ for 18 h.
3.8
maximum service pressure (Pms)
The internal balance pressure after the fire extinguisher filled and pressurized as rated is placed at 60℃ for 24 h.
