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Ideal fire extinguishers.

Byline: Fawad Barry

Dry chemical stored pressure type fire extinguishers are ideal for use inside the buildings including offices, banks, airport terminals, restaurants, shopping malls, hotels, expo and convention centers, school, colleges, universities, low or medium hazard industry etc.

The stored pressure type dry chemical fire extinguishers are usually multipurpose and can be used in all types of fire. Moreover, they are equipped with pressure gauge which depicts the inside story of the extinguishers. However, the stored pressure type fire extinguishers are not the right choice for oil and gas fields, high risk industry due to the following reasons;

v Stored pressure cylinders need refilling by qualified experienced professional.

v Stored pressure cylinder gauge some time depicts wrongly and betrays the trust.

v Professional companies can only do refilling, therefore remote locations face problems and cannot avail timely facility.

v Maintenance cost increases.

v In field areas, these extinguishers cannot stand high temperatures releasing pressure.

v Powder condition, checking not possible

Cartridge operated dry chemical fire extinguisher comprises of two parts, powder container and Co2 cartridge coupled together. To operate the extinguisher, open the valve of cartridge and CO2 will be released through siphon tube into the powder container. After pressure transfer, the automatic indicator (red signal pin) installed on the top of the container appears instantly and the extinguishers is ready to extinguish a fire.

The powder container is not pressurized in normal situation therefore; the powder can be checked easily after opening the cap of the container in the field area. The extinguisher is refilled easily in the field area by changing the powder and replacing the co2 cartridge with the spare cartridge. The used cartridge can be recharged and is available as spare. Whereas stored pressure extinguisher has to be brought at refilling facility, if not arranged at site.

Due to the non pressurized container the chance of mal functioning in cartridge operated extinguisher is almost zero. But there is always a chance of malfunctioning with stored pressure type fire extinguisher installed in an extreme weather conditions.

As per NFPA or US standard, to operate the extinguisher it has to be picked up in the left hand at the waist level, the hose should be in the right hand and then direct the jet to the base of fire.

The stored pressure type extinguisher is a double hand operated extinguisher, because the lever has to be squeezed continuously with left hand and the right-hand controls the discharge pipe. This is also a disadvantage in the heat of battle.

The cartridge operated extinguisher is also operated with both hands but discharge valve is squeezed with the right hand as the container is pressurized and the operator needs to pay attention to control the discharge while directing the jet at the base of fire.

The best brand of the world in fire extinguishers is Ansul USA as it is made of deep drawn process seamless cylinder, UL listed / FM approved, high quality painting, high tech puncture disc cartridge, very effective Purple K Powder. The life span is min 20 to 25 years. However, it is very expensive mostly the American Companies are relying on ANSUL USA.

If we go for economy and reliability too, Gloria Germany is the second best choice.

Dry chemical stored pressure type fire extinguishers are ideal for use inside the buildings including offices, banks, airport terminals, restaurants, shopping malls, hotels, expo and convention centers, school, colleges, universities, low or medium hazard industry etc.

The stored pressure type dry chemical fire extinguishers are usually multipurpose and can be used in all types of fire. Moreover, they are equipped with pressure gauge which depicts the inside story of the extinguishers. However, the stored pressure type fire extinguishers are not the right choice for oil and gas fields, high risk industry due to the following reasons;

v Stored pressure cylinders need refilling by qualified experienced professional.

v Stored pressure cylinder gauge some time depicts wrongly and betrays the trust.

v Professional companies can only do refilling, therefore remote locations face problems and cannot avail timely facility.

v Maintenance cost increases.

v In field areas, these extinguishers cannot stand high temperatures releasing pressure.

v Powder condition, checking not possible

Cartridge operated dry chemical fire extinguisher comprises of two parts, powder container and Co2 cartridge coupled together. To operate the extinguisher, open the valve of cartridge and CO2 will be released through siphon tube into the powder container. After pressure transfer, the automatic indicator (red signal pin) installed on the top of the container appears instantly and the extinguishers is ready to extinguish a fire.

The powder container is not pressurized in normal situation therefore; the powder can be checked easily after opening the cap of the container in the field area. The extinguisher is refilled easily in the field area by changing the powder and replacing the co2 cartridge with the spare cartridge. The used cartridge can be recharged and is available as spare. Whereas stored pressure extinguisher has to be brought at refilling facility, if not arranged at site.

Due to the non pressurized container the chance of mal functioning in cartridge operated extinguisher is almost zero. But there is always a chance of malfunctioning with stored pressure type fire extinguisher installed in an extreme weather conditions.

As per NFPA or US standard, to operate the extinguisher it has to be picked up in the left hand at the waist level, the hose should be in the right hand and then direct the jet to the base of fire.

The stored pressure type extinguisher is a double hand operated extinguisher, because the lever has to be squeezed continuously with left hand and the right-hand controls the discharge pipe. This is also a disadvantage in the heat of battle.

The cartridge operated extinguisher is also operated with both hands but discharge valve is squeezed with the right hand as the container is pressurized and the operator needs to pay attention to control the discharge while directing the jet at the base of fire.

The best brand of the world in fire extinguishers is Ansul USA as it is made of deep drawn process seamless cylinder, UL listed / FM approved, high quality painting, high tech puncture disc cartridge, very effective Purple K Powder. The life span is min 20 to 25 years. However, it is very expensive mostly the American Companies are relying on ANSUL USA.

If we go for economy and reliability too, Gloria Germany is the second best choice.n

The author is the CE of Haseen Habib Trading Corporation
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Publication:Energy Update
Date:Dec 31, 2010
Words:1092
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