Log In Sign Up

NOTE: This is an unformatted excerpt from our online fire protection training library.

Introduction to Clean Agents

Commonly Used Clean Agents

IG-55 (Argonite)

IG-55 is a blend of 50% nitrogen and 50% argon produced under the trade name of Argonite® by Ginge-Kerr. It is classified as an inert gaseous clean agent and is employed at design concentrations typically ranging from 40% to 47.5% by volume. This concentration range corresponds to an agent volume requirement of 51.1 to 64.4 ft3/100 ft3 of protected volume (51.1 to 64.4 m3/100 m3 of protected volume). It is stored as a compressed gas in the discharge cylinder with a pressure of 2900 psig (200 bar). Under these conditions IG-55 has a cylinder fill of 202 ft3 of agent delivered/ft3 of cylinder (202 m3 of agent delivered/m3 of cylinder), which corresponds to an agent storage volume requirement of 0.253 to 0.319 ft3/100 ft3 of protected space (253 to 319 L/100 m3 of protected space). 
 
It is nontoxic, odorless and colorless and is not suspected of contributing to stratospheric ozone depletion or directly to global warming.

IG-55, like other inert gaseous clean agents, can be a simple asphyxiant at high concentrations with physiological effects being based on the reduced oxygen concentration in the protected enclosure. In NFPA 2001, oxygen concentrations are treated as the functional equivalents of the NOAEL (no observable adverse effect) and LOAEL (lowest observable adverse effect) levels. Oxygen concentrations for asphyxiation are: 12% NOAEL and 10% LOAEL. The corresponding agent concentrations are 43% NOAEL and 52% LOAEL.
NOTE: This is an unformatted excerpt from our online fire protection training library.

Contact Us:

Please fill in the fields below:

    Privacy Policy
    Please choose all that interest you.

    Contact Customer Service at AcademySupport@jensenhughes.com or 800-930-9414 option 1.

    Our regular support hours are 9:00 AM to 5:00 PM, Monday through Friday, except holidays...