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The 2009 NFPA 17's provides users with the best practices for dry chemical extinguishers!
NFPA 17 - Standard for Dry Chemical Extinguishing Systems, 2009 Edition Gives you the tools and knowledge you need to keep equipment in top shape. By following the guidelines in this Standard, you'll always be ready to respond with the latest requirements on all functions for dry chemical extinguishing systems, from design to operation and recharging
This document includes extensive coverage of a range of criteria, including total flooding, local application, hand hose line, and engineered and pre-engineered systems. The 2009 edition of NFPA 17 has also been updated to include clarified rules for certification and training of maintenance personnel and a new requirement for tagging of all non-compliant systems. 24pp.
NFPA 17 - Standard for Dry Chemical Extinguishing Systems, 2009 Edition