The first edition of NFPA 400, published in 2010 incorporated a number of existing NFPA hazardous materials code into a single code and utilizes the MAQ (maximum allowable quantity) concept to provide fundamental safeguards for the storage, use, and handling of hazardous materials such as ammonium nitrate, corrosives, flammable solids, organic peroxides, oxidizers, pyrophoric materials, toxic and highly toxics, unstable reactives and water reactives.
The first draft report on NFPA 400 Hazardous Materials Code was recently posted and is open for public comment at www.nfpa.org/400 until May 10, 2017. The technical committee is seeking comments on a number of proposed changes made at the First Draft meeting (First Revisions) as well as on Committee Inputs. Highlights of changes made at first draft include requirements for the storage of ammonium nitrate in railcars and the division of Class II Organic Peroxides into two classes, IIA and IIB, based on differences in burning rates. Key changes proposed in committee inputs include the consolidation of occupancy tables into a single table to improve ease of document use and the reclassification of a number of organic peroxides in Annex F. To stay informed about upcoming meetings and document revisions sign up for email alerts located above the information tabs at www.nfpa.org/400.