Class A foam fire extinguishing agent is a new type of foam and wetting agent specially formulated, which improves the permeability of water, reduces the surface tension of water, and enables water to penetrate deep into the interior of general combustible substances without being in the fire. The surface of the material is flowed off, so the A-type foam liquid can effectively extinguish the fire in the deep part of the combustible material, which can not only quickly extinguish the fire but also save fire-fighting water, and also exert the heat-absorbing effect of water in the fire site to prevent resurgence.
Class A foam fire extinguishing agent-related terms
- Class A foam extinguishing agent
It is a foam fire extinguishing agent mainly suitable for extinguishing Class A fires. - Characteristic values
The physical and chemical performance parameter values of foam liquid and foam solution proposed by the supplier of Class A foam fire extinguishing agent. - Foam concentrate
A concentrated liquid that can be mixed with water at an appropriate concentration to form a foam solution, also known as a foam concentrate. - Foam solution
The solution prepared by foam liquid and water according to the specified concentration is also called a foam mixture. - 25% drainage time
The time required to separate out 25% of its mass liquid from the foam. - Expansion
The ratio of the foam volume to the volume of the foam solution that makes up the foam. - Mixture ratio
When the foam liquid is mixed with water to prepare the foam liquid, the foam liquid used accounts for the volume percentage of the foam solution. - Forceful application
A method of foam supply that applies foam directly to the surface of the liquid fuel. - Slow release of gentle application
A method of indirectly delivering foam onto the surface of liquid fuel through a baffle, tank wall, or other surfaces. - 25% burnback time 25% burnback time
The time required from the ignition of the anti-burn tank to the ignition of 25% of the fuel area of the oil pan. - The lowest useful temperature
A temperature 5°C higher than the freezing point. - Compressed air foam systems
It is a foam-generating system that can press a proper amount of air into the foam liquid within a certain pressure range to form various foam multiples and different states of foam.
Class A foam fire extinguishing agent classification
Class A foam fire extinguishing agents are divided into the following two categories according to product performance:
a) Class A foam fire extinguishing agent suitable for extinguishing Class A fires and heat insulation protection, code-named MJAP.
b) Class A foam fire extinguishing agent suitable for extinguishing Class A fires, non-water-soluble liquid fuel fires, and heat insulation protection, code-named MJABP.
Labeling, packaging, transportation, and storage of Class A foam fire extinguishing agents
the sign
Class A foam fire extinguishing agent packaging containers should clearly and firmly indicate:
- Name, type;
- Use conditions for extinguishing class A fires (eigenvalues HA, FA of mixing ratio and foaming multiple);
- Use conditions of heat insulation protection (mixing ratio characteristic value HG);
- MJABP type A foam fire extinguishing agent should also indicate “suitable for extinguishing the non-water-soluble liquid fire”, fire extinguishing performance level and service conditions (characteristic values HB, FB of mixing ratio and foaming multiple);
- Wetting time under the conditions of 0.3%, 0.6%, and 1.0% mixing ratio;
- If applicable to seawater, indicate “applicable to seawater”, otherwise indicate “not applicable to seawater”;
- If it is not affected by freezing or thawing, it should be marked “not affected by freezing or thawing”, otherwise it should be marked “no freezing”;
- Possibility of harmful physiological effects that can be caused, methods of avoidance, and rescue measures after the occurrence;
- Storage temperature, minimum use temperature, and expiration date;
- Net weight of Class A foam fire extinguishing agent;
- Production batch number or production date;
- According to the standard number;
- The name and address of the manufacturer.
Package
Foam liquid should be sealed and stored in plastic barrels or iron barrels with anti-corrosion treatment on the inner wall.
Transport and storage
Avoid bumping during transportation to prevent damage to the packaging.
Class A foam fire extinguishing agents should be stored in a ventilated and cool place, and the storage temperature should be lower than 45°C, which is higher than its minimum use temperature. Store according to the storage conditions stipulated in this standard or the storage conditions proposed by the manufacturer. The storage period of the foam liquid is 3 years. During the storage period, the performance of the product should meet the requirements of this standard. For products beyond the storage period, a performance test should be carried out every year to determine whether the product is effective.
