Based on the standardized tests conducted with Halon 1301 as a suppressant for Class A and Class B fires, computer programs have long been available to installers of Halon 1301 based fire suppression systems
This invention relates to a retrofitted Halon 1301 system in which HFC-125 is substituted for Halon 1301 using the existing piping distribution, to methods of retrofitting existing Halon 1301 systems substituting HFC-125 for Halon 1301 and to methods of designing and installing new systems based on the use of HFC-125 in lieu of Halon 1301.
The method of this invention permits retrofitting of existing Halon 1301 suppressant agent systems with a minimum extinguishing concentration of the agent taking into account a requisite safety factor as required by a controlling regulatory authority and without change in the piping of the existing system,
Extending the agent suppressant discharge time from 10 seconds to, for example, 20 seconds requires that additional suppressant agent be provided to meet the 30 second Class-B extinguishment test requirement.
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