1、NFPA 652 Standard on the Fundamentals of Combustible Dust 2016 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization 1/14IMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPASTANDARDS NOTICE AND DISCLAIMER OF LIABILITY CONCERNING THE USE OF NFPA STAND
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29、ewed at no cost at www.nfpa.org/freeaccess.Copyright 2015 National Fire Protection Association. All Rights Reserved.NFPA652Standard onthe Fundamentals of Combustible Dust2016 EditionThis edition of NFPA 652, Standard on the Fundamentals of Combustible Dust, was prepared bythe Technical Committee on
30、Fundamentals of Combustible Dusts, released by the Correlat-ing Committee on Combustible Dusts, and acted on by NFPA at its June Association TechnicalMeeting held June 2225, 2015, in Chicago, IL. It was issued by the Standards Council onAugust 18, 2015, with an effective date of September 7, 2015.Th
31、is edition of NFPA 652 was approved as an American National Standard on September 7,2015.Origin and Development of NFPA 652NFPA 652, Standard on the Fundamentals of Combustible Dust, provides the general require-ments for management of combustible dust fire and explosion hazards and directs the user
32、 toNFPAs industry- or commodity-specific standards, as appropriate: NFPA 61, Standard for thePrevention of Fires and Dust Explosions in Agricultural and Food Processing Facilities; NFPA 484,Standard for Combustible Metals; NFPA 654, Standard for the Prevention of Fire and Dust Explosionsfrom the Man
33、ufacturing, Processing, and Handling of Combustible Particulate Solids; NFPA 655,Standard for Prevention of Sulfur Fires and Explosions; and NFPA 664, Standard for the Prevention ofFires and Explosions in Wood Processing and Woodworking Facilities. This new standard establishesthe relationship and h
34、ierarchy between it and any of the industry- or commodity-specificstandards, ensuring that fundamental requirements are addressed consistently across indus-tries, processes, and dust types.While NFPA has addressed combustible dust hazards and safeguards for flour and pulver-ized fuels, such as coal,
35、 as far back as 1920, it was not until 2003 that users from all sectorscomprehensively examined the specific requirements contained in the five commodity-specific NFPA standards. Those documents apply broadly to varied facilities, processes, equip-ment types, and dust types to protect against the ha
36、zards from combustible dust fires andexplosions.A basis for safety embedded in each of those standards requires the fuel in this case dust to be managed, ignition sources to be controlled, and impact from an explosion to belimited through construction, protection, isolation, and housekeeping.Some us
37、ers of the NFPA commodity-specific standards believed that the requirements wereinconsistent between the various industry sectors and the dust types, leading to confusion indetermining which standard applied and how to protect similar hazards within a given pro-cess. In response to that perceived ch
38、allenge to the longstanding NFPA combustible duststandards, NFPA staff addressed the question of whether there was a better way to structurethe committees and standards. Working through the direction of the NFPA Standards Coun-cil, a task group chaired by a member of the Council explored options for
39、 restructuring thecombustible dust project. The task group consisted of the chairs of the technical committeesfor the four existing commodity-specific standards, an additional member from each commit-tee, and NFPA staff liaisons. A report presented to the Standards Council at its March 2011meeting c
40、ontained two key recommendations: the establishment of a correlating committeeto oversee the work of the four existing combustible dust committees, as well as the work of aproposed new Technical Committee on Fundamentals of Combustible Dusts, and the estab-lishment of a new committee whose scope wou
41、ld permit it to develop documents on themanagement of hazards from combustible dusts and combustible particulate solids.The Technical Committee on Fundamentals of Combustible Dusts began its work in ear-nest in early 2012, using task groups to develop draft chapters based on a straw-man outlinepropo
42、sed by the committee. A preliminary draft was developed and approved by the commit-tee to serve as the basis for requesting approval from the NFPA Standards Council to establish6521NFPA and National Fire Protection Association are registered trademarks of the National Fire Protection Association, Qu
43、incy, Massachusetts 02169.a specific revision cycle. The Council initially approved the development of NFPA 652 for the Fall 2014 cycle; duringthe second draft stage of the process, however, the committee requested more time to review and process the extensivepublic comments received. That request w
44、as approved, and the standard was moved to the Annual 2015 cycle.Hazard awareness appears prominently in the standard through the inclusion of chapters on hazard identification,hazard analysis or evaluation, and hazard management involving hazard prevention or mitigation. The committeemade some of t
45、he requirements in NFPA 652 apply retroactively, including dust hazards analysis (DHA). For existingfacilities, a DHA is permitted to be phased in and completed not later than 3 years from the effective date of thestandard. Because so many of the investigation findings conclude that owners/operators
46、 appear to be unaware of thehazards posed by combustible particulate solids that have the potential to form combustible dusts when processed,stored, or handled, the Committee believed it essential to establish the DHA as a fundamental step in creating a planfor safeguarding such facilities.Together
47、with this first edition of NFPA 652, the combustible dust standards speak directly to such critical factors asdust containment and collection, hazard analysis, testing, ventilation, air flow, housekeeping, and fire suppression.The provisions of this new standard incorporate many of the lessons learn
48、ed and recommendations issued as part ofthe combustible dust incident investigation findings reported by the Chemical Safety Board. In addition, this newstandard complements the efforts of the Occupational Safety and Health Administration and its National EmphasisProgram on combustible dust.This fir
49、st edition of NFPA 652 is dedicated to the memory of workers who have suffered and lost their lives from thehazards of combustible dusts, in the hope that it will help prevent such tragedies in the future.6522 THE FUNDAMENTALS OF COMBUSTIBLE DUST2016 EditionCorrelating Committee on Combustible DustsKevin Kreitman, ChairCity of Redding Fire Department, CA EChris Aiken, Cargill, Inc., MN UMatthew J. Bujewski, MJB Risk Consulting, MO SEJohn M. Cholin, J. M. Cholin Consultants Inc., NJ SEGregory F. Creswell, Titanium Metals Corporation(TIMET), PA MScott G. Davis, GexC
