Aksay Yangın

Smart Technologies in Fire Fighting
   0 212 210 02 43
Menu
INERT GASEOUS EXTINGUISHING SYSTEMS
,

INERT GASEOUS EXTINGUISHING SYSTEMS

It is a “Clean Agent” system consisting of one of the inert gases freely present in the atmosphere or a mixture of these gases. Chemically neutral, insulating, colorless and odorless. Ozone damage potential (ODP) and global warming potential (GWP) are zero. It extinguishes by reducing the Oxygen level in the applied area below the combustion limits. 200 or 300bar systems can be preferred.

Inert Systems are classified according to the gas used.

  • IG-01 consists of 100% pure Argon gas.
  • IG 55 consists of 50% Argon + 50% Nitrogen gas mixture.
  • IG-100 consists of 100% pure Nitrogen gas.
  • IG-541 consists of 52% Nitrogen + 40% Argon + 8% CO2 mixtures.
Categories: ,

What should be considered when designing Inert Systems?

  • Design Standard
  • Volume Dimensions
  • Hazard Type
  • Fire Type
  • Maximum and Minimum Temperature
  • Location relative to Sea Level
  • Ventilation Detail
  • Design Concentration
  • Pre-calculation
  • Final Calculation
  • Net result

based on the above basic items.

Main Properties of Inert Systems

  • Inert Gases (Noble Gases) are obtained from the atmosphere
  • Not Conductive
  • Colorless and Odorless
  • Non-corrosive
  • No Thermal Shock
  • Does Not React
  • Extinguishes by Reducing the Oxygen Level
  • No Waste After Discharge, No Cleaning Required
  • Safe to Use in Places with People
  • No Harm to Ozone
  • No Global Warming
  • Excellent Visibility in the Discharged Area
  • Cylinders can be placed away from the risk area
  • Discharge Time is 60 seconds
  • Low Refill Cost
  • Widely Available
  • On-site Installation

Usage Areas of Inert Systems

  • Data Processing Rooms
  • UPS Rooms
  • Electricity Distribution Centers
  • Valuable Material Warehouses
  • Telecommunication Centers
  • Turbine Cabinets
  • Archives and Museums
  • Flammable and Combustible Material Warehouses
  • Off-Shore Applications
  • Civil, Military and Marine Applications

Where Inert Systems Cannot Be Used?

  • Nitrocellulose fires (Oxygen)
  • Sodium Chlorate or Sodium nitrate (Oxidizer)
  • Oxygenperoxides
  • Reactive metals such as sodium, potassium and magnesium
  • Radioactive metals such as uranium and plutonium

They reduce the amount of oxygen in the risk area below the minimum level required for combustion. Thus, the fire cannot continue due to lack of oxygen. Inert gases, although they are the same as CO2 in terms of extinguishing methods, are very safe for active areas where people are present.

Since the density of IG-541 and IG-55 gases is close to the density of air, the density of spreading and covering the area after discharge is close to the distribution of air and a homogeneous distribution is provided in the protected area. Leaks can also occur from the upper and lower levels of the protected area. Since nitrogen is lighter than air, it tends to leak through openings in the upper levels. Argon gas, on the other hand, is heavier than air, so leaks through openings are more likely to occur at lower levels.

Inert Gas Systems differ in terms of working pressures according to manufacturers. Within the scope of standard production, 80l. or 140l. cylinders are used. For these cylinders, UL, FM and VdS approved system options with 200 bar or 300 bar working pressure are produced in line with market demands.

Inert systems do not require cylinders to be positioned close to the installation location. It allows you to identify cylinder chambers at distances that can be considered seriously remote.

Protection of multiple zones over a single system can be provided by using selector valves. For this we recommend that the main system to be selected with 100% redundancy.

Before applying Inert Systems, the relevant protection areas must be subjected to “Door-Fan Test”, “Puff Test” and “Pipe Leak Test”.

System design is made in accordance with NFPA 2001 or EN 15004 standard. An accurate engineering study is carried out in the field and the hazard classification of the area to be protected is made.

IG-01 Inert System Design Concentrations

  • Class A: 41.9%
  • Class A Higher: 49.2%
  • Class B: 51.7%

IG-55 Inert System Design Concentrations

  • Class A: 40.3%
  • Class A: 45.2%
  • Class B: 47.%

IG-100 Inert System Design Concentrations

  • Class A: 40.3%
  • Class A: 45.2%
  • Class B: 47.6%

IG-541 Inert System Design Concentrations

  • Class A: 39.9%
  • Class A Higher: 45.7%
  • Class B: 48.1%

Using the above extinguishing concentrations, the application intensity, i.e. flooding factor, is determined according to the hazard class (Data are given in accordance with EN 15004 standard).  The required amount of extinguishing gas is calculated using the determined flooding factor.

Protection of multiple zones over a single system can be achieved by using selector valves. For this, we recommend that the main system is selected with 100% redundancy.

The system is used together with the Extinguishing Control Panel and accessories. The detection part of the extinguishing system can be designed by using different detectors according to the requirements of the area to be protected.

AKSAY Yangın realizes the design, engineering calculations, procurement, installation – testing – commissioning and contracted maintenance services of Inert Gas Systems in cooperation with SIEX with its trained engineers and technicians.

Related products