NFPA Votes on FSSA Clean Agent Concentration Recommendations

On Wednesday June 15, the membership of the NFPA considered two floor motions as submitted by the FSSA on NFPA 2001. The results of the NFPA member vote on these motions are:

1) Motion to retain current minimum design concentration requirement in the 2008 edition of NFPA 2001 paragraph 5.4.2.4 FAILED. Thus paragraph 5.4.2.4 in NFPA 2001 (2011 edition) will, if approved by the NFPA Standards Council, read:

5.4.2.4* The minimum design concentration for a Class A surface fire hazard shall be determined by 5.4.2.4.1 or 5.4.2.4.2, whichever is greater.
5.4.2.4.1 The extinguishing concentration, as determined in 5.4.2.2, times a safety factor of 1.2
5.4.2.4.2 Equal to the minimum extinguishing concentration for heptane as determined from 5.4.2.1. (Wysocki note: 5.4.2.1 references the cup burner test)

2) Motion to retain current requirement for Class C design concentrations in paragraph 5.4.2.5 in NFPA 2001 – 2008 edition PASSED. A successful follow up motion made by Brad Stilwell representing Fike Corporation amended the initial motion. The successful follow up motion will replace the current language in 5.4.2.4 NFPA 2001 Edition 2008 with the following:

5.4.2.5 The minimum design concentration for a Class C hazards shall be the extinguishing concentration, as determined by 5.4.2.2, times a safety factor of 1.35.
5.4.2.5.1 The minimum design concentration for spaces containing energized electrical hazards supplied at greater than 480 volts which remains powered during and after agent discharge, shall be determined by testing, as necessary, and a hazard analysis.
The concentrations based on the Class A minimum extinguishing concentrations times a safety factor of 1.35 are essentially those contained in Table 5.4.2.5 in the ROC. The five qualifying items contained in the ROC for use of these concentrations are to be eliminated.

The next step in the standard development process will be a vote by the NFPA Technical Committee on the recommendation of the NFPA membership to accept the motion as amended by the follow up motion on Class C. A 2/3 majority of the NFPA 2001 Technical Committee member votes in favor of the floor action on Class C will recommend that Standards Council accept the floor action.

Since the NFPA membership failed to pass the motion (NITMAM) on Class A concentrations, the ROC language is automatically recommended to the Standards Council.

The Standards Council will meet on August 11, 2011 to consider the ROC and, if approved by 2/3 of the NFPA 2001 Technical Committee, the follow up motion language. The Standards Council will also consider any appeals related to the NFPA Standard 2001 ROC and floor motions at that time. Closing date for appeals to the Standards Council is July 6, 2011.

It is possible to appeal Standards Council actions to the NFPA Board of Directors. Such appeals, however, are rarely heard.

Standards generally become effective 20 days after the Standards Council acts to issue the standard. Assuming that the Standards Council approves the revised NFPA 2001 document at its August meeting, the new NFPA 2001 Standard 2011 edition will become effective September 1, 2011.

THE FOLLOWING TABLE IS SHOWN FOR INFORMATION ONLY.
CONTACT SYSTEM MANUFACTURER FOR OFFICIAL DESIGN CONCENTRATIONS
From NFPA Standard 2001 Report on Comments November 2010:
Table 5.4.2.5 Class C Minimum Design Concentration

FK-5-1-12
HFC-125
HFC-227ea
HFC-23
IG-01
IG-100
IG-541
IG-55
4.7
9
7
17
40.8
40.5
38.5
42.7

Courtesy of FSSA

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