Constituent: | Industrial Mixture |
---|---|
Grade Standard: | Industrial Grade |
Chemical Property: | Non-Flammable Gas |
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In the event of a fire, when IG-541 is discharged, it mixes with the air present in the room to create a mixture that comprises of 67.3% Nitrogen, 12.5% Oxygen, 17% Argon and 3.2% Carbon Dioxide.
This discharge mixture makes IG-541 singularly unique. No other inert gas has the unique ability to rapidly extinguish a fire yet at the same time provide a safe environment for any person within the occupied area by decreasing cardiac distress and maintaining arterial blood oxygenation and mental performance in low oxygen levels.
Trade Names.
Inergen, Inertech IG541, I-Flow IG541, Proinert IG541
Chemical Composition.
IG-541 is a colourless, odourless, electrically non-conductive gas with a density approximately the same as that of air. It is an inert gas mixture consisting nominally of 52% Nitrogen, 40% Argon and 8% CO2.
Gas Specification.
The gas specification is usually confirmed with a certificate of conformity (COC) from the manufacturer. It's also important to ensure each specification is maintained during the 10-year testing and a new COC is provided confirming each requirement below by your supplier for the new re-filled or re-tested agent.
The mixture specification for IG-541 is as follows:
a) carbon dioxide percentage range 7.6% to 8.4%.
b) argon percentage range 37.2% to 42.8%.
c) nitrogen percentage range 48.8% to 55.2%.
Extinguishant IG-541 shall comply with the specification shown below:
Component | Argon | Nitrogen | Carbon Dioxide |
---|---|---|---|
Purity | 99.997% by volume, min. | 99.99% by volume, min. | 99.5% by volume, min. |
Moisture | 4 ppm by mass, max. | 5 ppm by mass, max. | 10 ppm by mass, max. |
Oxygen | 3 × 10−6 by mass, max. | 3 × 10−6 by mass, max. | 10 × 10−6 by mass, max. |
Property | Units | Value |
---|---|---|
Molecular mass | n/a | 34.00 |
Boiling point at 1,013 bar (absolute) | °C | - |
Freezing point | °C | - |
Critical temperature | °C | - |
Critical pressure | bar | - |
Critical volume | cm3/mol | - |
Critical density | kg/m3 | - |
Vapour pressure 20 °C | bar abs | - |
Liquid density 20 °C | g/ml | - |
Saturated vapour density 20 °C | kg/m3 | - |
Specific volume of superheated vapour at 1,013 bar and 20 °C | m3/kg | 0.706 |
Standard | Class A | Higher Hazard Class A / Class C | Class B |
---|---|---|---|
(BS) EN 15004 | 39.9% | 45.7% | 48.1% |
NFPA 2001 | 34.2% | 38.5% | 40.3% (n-heptane) |
APSAD | 39.9% | 41.0% | Subject to hazard |
ISO 14520 | 39.9% | 39.9% | 43.9% |
LPCB | 39.1% | 42.1% | 44.6% |
FM 5600 | 34.9% | 39.2% | 42.2% |
UL 2127 | 36.5% | 41.0% | 42.2% |
Typically, gaseous extinguishing systems are used for protecting electronic equipment in data rooms or similar, we have therefore prepared a quick calculation to help understand and estimate the quantity IG-55 agent required in your enclosure. The factor provided below is also based on a design temperature of 20°C and an altitude of 0, changes in either will have a small effect on the agent quantity
Design Concentration = 45.7% (Higher Hazard Class A)
Flooding Factor = 0.8689
Volume of enclosure in M³ x Flooding Factor = Quantity required in KG
[Example assuming room volume of 150m³]
150 x 0.8689 = 130.335kg
Pressure | 67 Litres | 80 Litres | 140 Litres |
---|---|---|---|
200 bar | 20.17kg | 24.1kg | 42.1kg |
300 bar | - | 33.5kg | 58.5kg |
By using the quantity calculation above, and the maximum fill of each cylinder above, you can work out how many cylinders are typically required for your protected area.