DATE:



|OFM curriculum |Lesson Plan – Portable extinguishers |

|Component - 1 |Prepared by- T.O Karn |

|Section - 13 |Preparation date – Jan 2013 |

|SPECIAL PRECAUTIONS |

| |

|Ensure to wear proper PPE when extinguishing fires |

|Take necessary precautions when pressurizing and re-charging extinguishers |

|Understand concerns relating to the use of pressurized cylinders |

|LEARNING OUTCOME(S): The learner will be able to: |

|Describe the types of extinguishing agents |

|Describe the classification system for port. extinguishers |

|Describe method of propulsion |

|Describe types of port extinguishers used by the fire service and the class each one is designed for |

|Describe characteristics of each type of extinguisher |

|Identify hazards of using port extinguishers |

|Describe procedures for inspecting, maintaining and storing equip. |

|Describe procedure for selecting and using appropriate extinguisher for specific type of fire |

|Describe re-charge procedures |

|INTRODUCTION: |ESTIMATED TIME: |

| |

|It is part of the firefighters responsibility to be able to recognize, select and recommend the fire extinguisher best suited for the condition. It |

|is also important that the firefighter knows the fundamentals of fire classifications and extinguishment. The firefighter musty have comprehensive |

|knowledge of the characteristics of extinguishers to enable him or her to use them to the best advantage and to properly service, maintain and |

|operate them. |

|APPLICABLE SECTION 21 GUIDANCE NOTES & SAFETY NOTE |

| |

|Remember as the T/F you are a supervisor for this work period and will observe and enforce all appropriate health and safety measures for you lesson |

|participants. |

| |

|NFPA 1001 |

|NFPA 10 |

|Be sure to add in any of your dept. SOG’s that apply |

|PRESENTATION |ESTIMATED TIME: |

|LESSON OUTLINE |TEACHING AIDS |

|FIRE CLASSIFICATIONS | |

| | |

|A – Ordinary combustibles | |

|B – flammable liquids and gases | |

|C – energized electrical equipment | |

|D – combustible metals | |

| | |

|PORTABLE EXTINGUISHER RATING SYSTEM | |

| | |

|A letter class rating can be found on extinguishers and it refers to the performance capability of | |

|the extinguisher. The letter also correspondes to the fire it is designed to suppress | |

| | |

|Class A Rating – rated from 1-A through 40 – A. this rating denotes the amount of extinguishing | |

|agent, duration and range of dis-charge. For a 1-A rating 5L of water is req’d….a 2-A rating requires| |

|10 L of water, twice as much capacity as a 1-A | |

| | |

|Class B Rating – extinguishers for class b fires are rated from 1-B through 640-B. rating refers to | |

|the amount of fire a non-expert operator should be able to suppress. A non – expert operator is | |

|expected to be able to suppress 1 square foot of fire for each numerical rating. |Example: rating of 10-B would suppress 10 |

| |square ft of fire. |

|Class C Rating – There is no specific rating for class C fires because electricity doesn’t burn. The | |

|fire usually involved class A and B materials. The C class simply identifies that the ext. agent will| |

|not conduct electricity | |

| | |

|EXTINGUISHER IDENTIFICATION / CHARACTERISTICS | |

| | |

|There are numerous types of extinguishers used in the fire service. The following are the most | |

|common; | |

| | |

|Pump –Tank (water) – used on class A fires, pumped manually by a single or double stag pump, usually | |

|contain a short hose and nozzle, 30 – 40 ft reach. Units are refilled quickly and easily. Mostly seen| |

|as a back-pack style for wildland and grass fires | |

| | |

|Stored Pressure Water - used on class A fires, hand carried extinguisher, air pressurized and ready | |

|for discharge, may have class A foam added to the water, 30 -40 ft reach. A gauge on the side shows | |

|when the extinguisher is properly pressurized | |

| | |

|Stored Pressure AFFF – used on class A and B fires, 30 – 40 ft reach, hand held extinguisher, air | |

|pressurized and ready for discharge, contain a gauge to ensure proper pressure, specific amount of | |

|foam added. Useful for combating fires or suppressing vapours from small liquid fuel spills. AFFF are| |

|different than stored water extinguishers in that they often have an air aspirating nozzle on the end| |

|of the hose to produce a higher quality foam rather than a standard nozzle. | |

| | |

|Dry Chemical – classed for use on B and C fires or A B C fires, may be stored pressure or a cartridge| |

|style unit (unit is pressurized once the cartridge is activated). A variety of agents are used inside|Ensure the gauge is checked for proper pressure|

|the extinguisher including; sodium bicarbonate, potassium bicarbonate, ammonium phosphate, potassium | |

|chloride | |

| | |

|CO2 – used on class B C fires, internal pressure stores liquefied CO2 untill exerted, CO2 is | |

|extremely cold when expelled. CO2 displaces the oxygen and suppresses the fire, however because the | |

|CO2 disperses quickly there is a chance of re-ignition. The reach of this extinguisher is low | |

| | |

|Dry Powder – used on class D fires, may be hand carried or wheeled cart style, main ingredient is | |

|sodium chloride. Oftem found stored in bulk | |

| | |

|Type K – used on type K fires which includes class B fires (generally combustible cooking oils). | |

|Designed primarily for kitchen use, hand carried extinguisher. Extinguisher suppresses vapours and | |

|smothers fire. | |

| | |

|EXTINGUISHMENT | |

| | |

|Selecting the proper extinguisher depends on a number of factors; |Dry Powder is often confused with Dry Chemical.|

|Classification of the burning fuel |These are 2 different style extinguishers with |

|Rating of the extinguisher |similar names |

|Hazards to be protected | |

|Size of the fire | |

|Ease of handling the extinguisher | |

|Availability of trained personnel | |

| | |

|PASS Method of application | |

| | |

|All modern fire extinguishers are operated in a similar way. Extinguishers do not have to be inverted| |

|to operate. Simply pick-up the extinguisher and take it to the area it is needed. Follow the PASS | |

|method to use the extinguisher. | |

|P – pull the pin ( this will also break the seal) | |

|A - aim the nozzle | |

|S – squeeze the handles together to release agent | |

|S – sweep the nozzle back and forth to cover the burning material | |

| | |

|Note: be sure the extinguisher will reach the fire or the agent will be wasted, however standing to | |

|close may scatter burning materials or liquids. | |

|Always wear appropriate PPE | |

|Approach the fire from upwind | |

|Test the ext. before approaching the fire | |

|Ensure extinguishment and back away | |

| | |

| | |

| | |

| | |

|INSPECTION AND MAINTENANCE | |

| | |

|Extinguishers need to be inpected and maintained on a regular basis. The following are items to be | |

|inspected and the intervals at which the inspections should be completed. | |

| | |

|Monthly Inspections - these inspections should include | |

|Ensure hose and nozzle are clear from obstructions | |

|Inspect for any physical damage | |

|Ensure nameplate and instructions on its use are legible | |

|Ensure locking pin and seal are in place | |

|Determine if extinguisher is full by checking gauge | |

|Check inspection tag | |

|Check condition of hose for cracks and/or defects | |

| | |

|Hydrostatic test requirements | |

| | |

|Dry Chemical – dump, clean, visually inspect and re-charge – every 6 yrs | |

|Full hydrostatic test every 12 yrs | |

| |Remove the extinguisher from service if any of |

|Water – Hydrostatic test every 5 yrs |these defects are found |

| | |

|Water with Foam Added – Hydrostatic test every 5 yrs | |

|- dump and clean extinguisher yearly | |

| | |

|CO2 - Hydrostatic test every 5 yrs | |

| | |

|Monthly inspections can be performed by anyone who has the training and knowledge. This may include | |

|any member of the fire dept. or organization. Hydrostatic tests must be completed by an approved | |

|testing contractor | |

| |Test req. for extinguishers are listed in |

| |NFPA-10 |

|SUMMARY: |TEACHING AIDS |

| | |

|In many cases portable extinguishers can control and extinguish small fires in less time that it | |

|takes to deploy a hoseline. Although extinguishers are found in many homes and business you should | |

|only rely on the ones that you carry on your own fire apparatus. | |

|APPLICATION & TEST: |ESTIMATED TIME: |

| | |

|ASSIGNMENT: |

| |

|Refer to OFM curriculum sect 13 performance demo. for practical evaluation |

|REFERENCE MATERIALS: |TRAINING AIDS REQUIRED: |

| | |

|IFSTA Essentials 5th Ed. ch 6 |Various dept. extinguishers to demo inpection procedures |

|OFM curriculum section 13 TF Guide |Fire extinguisher demo. unit for practical suppression training |

|NFPA 1001 |Air compressor to demo. re-charge procedure for water extinguishers |

|NFPA 10 | |

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download