Disadvantages: Generally >35% concentration by volume required for total flooding system. Toxic to humans at >4% by volume. Not the best agent for smoldering deep-seated fires (maintain concentration for >20 minutes)
What are two hazards involved in the use of Halon extinguishers?
The health risks for halon extinguishers include asphyxiation, frostbite burns to the skin, as well as skin and eye irritation. Inhaling halon compounds in high concentrations can cause central nervous system disorders including dizziness, unconsciousness and tingling in the arms and legs.
Why are Halon fire extinguishers illegal?
Halon fire extinguishers are now illegal in the UK, due to the damaging effect the fire extinguishing agent has on the Earth’s ozone layer. There are only three main exceptions to this rule; Halon fire extinguishers can be used in aircraft, for military use, and in the Channel Tunnel.
What is a disadvantage of carbon dioxide fire extinguisher?
Disadvantages Of Carbon Dioxide Extinguishers
As CO2 works by displacing the oxygen around the fire, it is not suitable for outdoor use, or in environments exposed to windy conditions. CO2 is a high pressured extinguisher. Using it on class A fires or class F fires could cause the fire to spread.
What is a Halon fire extinguisher used for?
Halon Fire Extinguishers are recommended for protection of delicate, sensitive and expensive computers, electrical equipment, tapes and film, automotive and aircraft engines, laboratory chemicals and equipment. Halon Extinguishers can also be used in bedrooms, home offices, home kitchens, cars, and garages.
What happens if you breathe halon?
Throat, eye, and nasal irritation and lightheadedness were reported by the majority of workers. Workers present during the halon discharge reported significantly more lightheadedness, headache, voice change, cough, and a fast heartbeat than did those who worked the later shift.
Is halon a hazardous material?
Inhalation: Halon 1211 is a simple asphyxiate. … Hazardous Combustion Products: Under certain conditions, fluorocarbon vapors may decompose on contact with flames or hot surfaces, creating the potential hazard of inhalation of toxic decompostion products such as hydrogen bromide, hydrogen fluoride, and hydrogen chloride.
Why is Halon bad for the ozone layer?
They are used in fire extinguishers and other firefighting equipment. Because of their bromine content, halons can destroy ozone molecules(O3) very effectively, thereby contributing to the depletion of ozone and the creation of holes in the ozone layer of the stratosphere .
Is Halon banned in India?
Halons are ‘clean agents’. Halon 1211 and 1301 are low-toxicity, chemically stable compounds that, as long as they remain contained in cylinders, are easily recyclable. … Under the Montreal Protocol Halon 1301, Halon 1211 and Halon 2402 are widely banned with some exceptions.
Why is Halon no longer manufactured in the United States?
In the mid ’90s, the manufacturing of Halon was banned because of the environment effects of the gas. However, the use of Halon was not banned. In fact, there are hundreds of systems still in service. The agent can still be acquired through groups that reclaim and recycle the material for use on the market.
What is a disadvantage of carbon dioxide fire extinguishers OSHA?
Because of this, CO2 has been and is being used for fire protection in a number of hazard situations. One drawback to using carbon dioxide, however, is that its mechanism of fire suppression is through oxygen dilution, and not, as is the case for halon, through chemical disruption of the catalytic combustion chain.
What is a disadvantage of multi class dry chemical fire extinguishers?
Reduces visibility when discharged, so consideration required when placing near escape routes, stairwells, etc. May aggravate respiratory conditions when discharged. Limited cooling properties. While Powder is safe for use on electrical fires, it can cause corrosion.
Which 2 fire extinguisher should not be used in confined spaces?
It is advised not use a CO2 fire extinguisher in a confined space, as it displaces oxygen and can asphyxiate the operator and other users.
What type of fires can halon be used on?
Halon is one of the most effective fire suppression agents available today. It can be used for Class A, B and C fires with great effect.
Does halon remove oxygen from the air?
Contrary to popular belief, Halon does not remove oxygen from the air, but rather reacts with all elements of a fire. When Halon is discharged, it breaks the chemical chain reaction. This accounts for most of its fire fighting properties. The other properties come from the cooling effect of the expanding gas.
Which of the following statement describes the advantage of using a halon fire extinguisher?
Halon is more effective than CO2. Halon can extinguish combustible metal fires. Halon is not toxic and safe to breathe under all conditions.