Presentation on theme: "PORTABLE& OTHER FIRE EXTINGUISHING SYSTEM Fire extinguisher= Is a device within its chemical, fluids,& gases for extinguishing and used for small area."— Presentation transcript:
PORTABLE& OTHER FIRE EXTINGUISHING SYSTEM Fire extinguisher= Is a device within its chemical, fluids,& gases for extinguishing and used for small area of fire. - citizen can use them to fight a small fire before the fire department arrives. - are designed to fight small incipient or unusual ones that are not easily put out of water. Fire fighter use them on certain unusual fire that hose line cannot put out
CLASSES OF FIRE Class B Fire Class C Fire Class D Fire Class K fire Class A Fire
1.Class A fires- Involves ordinary combustible such as wood, paper cloth, plastic & rubber. 2. Class B. fires- Involves flammables& combustible liquids,grease,gasses,such as gasoline,oils, alcohol, propane, cooking oils, pressurized liquid & gases. 3. Class C fires- involved energized electrical equipment which eliminate the use of water based agent to put them out. 4.Class D Fires- Involve in combustible metal & alloy such as magnesium, sodium, lithium, potassium 5.Class K Fires- It involve in combustible cooking fuels such as vegetable or animal oil and fats.
1.Water type 2. Foam extinguisher 3. Carbon dioxide extinguisher 4. Halon agent5. Dry chemical 6. Dry PowderExtinguisher 7. Wet chemical
Use in small class A fire. Generally equipped with double acting pump. 1.Pump tank Use full for all types of small class A fire. Operated by means of expelling gas that propel the agent out container. 2. Stored pressure water extinguisher
Most effective on static of flammable liquids. It should not be applied directly to the fuel. Suitable for use on class A&B fires They are not suitable for three-dimensional fires. Ex: such as fuel flowing down from leaky flange. The foam has good wetting &penetrating properties on class A fuels
Intended primarily for use on class B &C fires Stored in the nextinguisher as a liquefied compress gas. Ozone depleting agent. a. Halon 1211 The agent is discharge as a nearly invincible gas that is highly susceptible to be affected by wind. Ozone depleting agent b. Halon 1301
Effective in extinguishing class B & C fires. They have a limited reach. They do not require freeze protection. The agent is discharge thru a plastic or rubber horn on the end of either short hose or tube. This snow will sublime changes into gases from shortly after the discharge. The gaseous discharge is usually accompained by little dry ice or carbon dioxide snow.
Sodium bicarbonate- based Used for class A,B,C, fires Potassium bicarbonate- based. Mono ammonium phosphate. Among the most common portable fire extinguisher used today.
Some powder agent may be applied I portable extinguisher. Maybe applied by shovel or scoop. For combustible metal Example: magnesium, sodium, lithium, potassium. Available in handheld and & wheeled type.
Water based solution of potassium carbonate chemical Example: Vegetable or animal oil. For combustible cooking fuel.
1. Store- pressures Is similar to the designed to the air pressured water extinguisher. Constant pressure of about 200psi (1400kpa) is maintain in the tank. 2. Cartidge operated Employ a pressure cartridge connected to the agent tank. The agent tank is not pressurized until the plunger is pushed to release the gas from the cartidge. 3. Wheeled unit. They are rated for class A,B, & class C fire based on the dry chemical unit. The extinguishing agent is kept in one tank and the other pressurizing gas is stored in separate cylinder
1. NON - TOXIC & GENERALLY SAFE TO USE 2. Many dry chemical agent are corrosive to metal 3. The cloud chemical may reduce visibility &create respiratory problem.
1. REACTION BETWEEN THE METAL AND THE AGENT 2. TOXICITY OF THE AGENT. 3. TOXICITY OF THE FUMES PRODUCED AND THE PRODUCT OF COMBUSTION 4. TIME ALLOW THE METAL TO BURN OUT FIRE SUPPRESSION EFFORT VEERSUS TIME TO EXTINGUISH.
SELECTING PORTABLE FIRE EXTINGUISHER 1) Classification of the burning fuel 2) Rating of the extinguisher. 3) Hazard to be protected. 4) Severity of the fire 5) Atmospheric condition 6) Availability of trained personnel. 7) Ease of handling the extinguisher. 8) Any life hazard or operational concern
1. External condition, no apparent damage. 2. Hose, nozzle- in place. 3. Weight- feel as though it contain agent. 4. Pressure gauge( if any)- in operable range. 5. Check to ensure that the extinguisher is in a proper location & it is accessible. 6. Inspect the discharge nozzle or horn for obstruction, check for cracks & dirt or accumulation. 7. Inspect extinguisher shell for any physical damage. 8. Check to see if the operating instruction on the extinguisher name plate are legible. 9. Check the lock and pin& tamper seal to ensure that the extinguisher has not been tampered with. 10. Check the inspection tab for the date of previous inspection, maintenance or re charging. 11. Examine the condition of the hose & its associated fittings.
1. Select the appropriate extinguisher based on the size & type of the fire. 2. Hold the safety pin at the top of the size breaking the plastic or tin wire seal in the process. 3. Point the nozzle or horn in a safe direction & discharge a very short test burst to ensure proper operation. 4. Carry the extinguisher to within reach of the fire. 5. Aim nozzle or horn toward the material that is burning. 6. Squeeze the carrying handle & the discharge handle together to start the flow of the agent, release the handle to stop the flow. 7. Sweep the nozzle back & forth to ensure the full coverage by the extinguishing agent until the fire extinguished. 8. Watch for the smoldering hot spot for possible re-ignition of flammable liquid. 9. Back away from the fire.
1. Construction & design of approved standard. 2. Color marking-for identification 3. System of labeling-use of geometric shape, specific color with class letter. 4. Use photograph to make the selection (when and not to used) 5. Rating and testing classification. 6. Selection and location. 7. Care and maintenance.
EFFECTIVE RANGE OF THE FIRE EXTINGUISHER 1. Effective range of a pressurized water or foam extinguisher=20 ft (6meter). 2. Dry chemical unit from 15 to 20 feet ( 4.5 meter.) 3. CO 2 Type of extinguisher fro 10 to 15 feet (3 to 3.5 meter)
MARKING OF EXTINGUISHER ORDINARY COMBUSTIBLE FLAMMABLE LIQUID ELECTRICAL EQUIPMENT COMBUSTIBLE METAL A B C D
Prepared by: Engr. Gerardo A. Gabon, RME FOII BFP