Types of Fire Suppression Systems:
CRM covers following types of Fire Suppression System:
Difference between Wet (water based) and Dry Sprinkling System:
CISA Aspirant should be aware about difference between Wet & Dry Sprinkling System:
| Water-Based Systems (WBS) | Dry-Pipe Sprinkling Systems (DPSS) |
|---|---|
| In WBS, water always remains in the system piping. | DPSS do not have water in the pipes until an electronic fire alarm activates the water pump to send water into the system. |
| WBS is more effective and reliable. | Comparatively less effective and reliable. |
| Disadvantage of exposing the facility to water damage if pipe leaks or breaks. | Advantage of not exposing the facility to water damage even if pipe leaks or breaks |
What is Halon Gas System?
Halon gas removes oxygen from air thus starving the fire.
They are not safe for human life.
There should be audible alarm and brief delay before discharge to permit time for evacuation.
Halon gas is banned as its adversely effects the ozone layer.
Popular replacements are FM-200 & Argonite.
What is FM-200 Gas?
FM-200 is colorless & odorless gas.
FM-200 is safe to be used when people are present.
FM-200 is environment friendly.
It is commonly used as a gaseous fire suppression agent.
What is Argonite Gas?
Argonite is a mixture of 50% Argon & 50% Nitrogen.
It is used as a gaseous fire suppression agent.
Though environment friendly & non-toxic, people have suffocated by breathing argon by mistake.
What is CO2 ?
CO2 Systems release pressurised CO2 gas in the area protected to replace the oxygen required for combustion.
Unlike Halon, FM-200 & Agronite, CO2 is unable to sustain Human life.
In most countries, it is illegal for such systems to be set to automatic release if any human may be i the area.
CO2 installations are permitted where no humans are regularly present such as unmanned data centres.
Which gas is Safe for Human Life?
As per CRM, FM-200 & Argonite gases are safe for human life. However, it must be noted that Argonite, though environment friendly & non-toxic, people have suffocated by breathing argon by mistake.
CO2 & Halon gases are not safe for human life.