Notes from Tom Wysocki, FSSA Technical Director
NFPA 2001 The NFPA Standards Council is expected to issue the revision to NFPA 2001 Annual 2011 edition at the August 11 Standards Council meeting. The new standard will become effective 20 days thereafter. There are a number of significant changes in the new standard which will be of interest to FSSA members. Once the Standards Council formally acts on the standard, the FSSA will publish a summary of all the major changes to NFPA 2001. Right now, however, we’d like to update you on the status of two of the most discussed changes involving the minimum design concentration requirements for Class A and Class C hazards.
For Class A hazards, the minimum design concentration will be the greater of 1.2 X the minimum extinguishing concentration for Class A fires determined by the UL/FM listing tests or the extinguishing concentration for normal heptane determined from the cup burner test.
The minimum design concentration for Class C hazards will be 1.35 times the minimum Class A extinguishing concentration for Class C hazards where the supply voltage to equipment is 480 Volts or less. The new Class C minimum design concentration requirements are to read as follows:
184.108.40.206 The minimum design concentration for a Class C hazards shall be the extinguishing concentration, as determined by 220.127.116.11, times a safety factor of 1.35.
18.104.22.168.1 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.
Assuming the Standards Council issues the revised standard in August as expected, designers and installers of clean agent systems should contact the system manufacturer for advice on how to apply the new concentration requirements as well as other new requirements contained in NFPA 2001.
NFPA Report A new report entitled U.S. Experience with Non-Water-Based Automatic Fire Extinguishing Equipment by John R. Hall, Jr. was issued in May 2011 by the National Fire Protection Association. The report is available free of charge to the general public from the following link to the NFPA website: http://www.nfpa.org/assets/files//PDF/OS.NonWaterExtinguishing.pdf. Although the report mentions halon, carbon dioxide systems, foam and other special hazards systems, the report deals almost exclusively with success and failures of restaurant kitchen extinguishing systems. The statistics in the report are taken from U.S. Fire Administration’s National Fire Incident Reporting System (NFIRS 5.0) and the NFPA’s annual fire department experience survey. FSSA members involved in the installation and service of kitchen systems might be interested in this new report.
FSSA Technical Committee Meeting The next meeting of the FSSA Technical Committee is scheduled for October 12, 2011 in Baltimore, MD. The meeting is open to all FSSA members. If you wish to attend, please contact FSSA Executive Director Crista LeGrand or FSSA Technical Committee Chairman Dan Hubert for further detail.
July 25, 2011