1、 NFPA 654 Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids 2017IMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPA DOCUMENTS NOTICE AND DISCLAIMER OF LIABILITY CONCERNING THE USE OF NFPA DOCUMENTS NFPA codes, sta
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29、at no cost at www.nfpa.org/freeaccess.654-1 NFPA and National Fire Protection Association are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169. Copyright 2016 National Fire Protection Association . All Rights Reserved. NFPA 654 Standard for the Preventio
30、n of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids 2017 Edition This edition of NFPA 654, Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids, was prep
31、ared by the Technical Committee on Handling and Conveying of Dusts, Vapors, and Gases and released by the Correlating Committee on Combustible Dusts. It was issued by the Standards Council on May 13, 2016, with an effective date of June 2, 2016, and supersedes all previous editions. This edition of
32、NFPA 654 was approved as an American National Standard on June 2, 2016. Origin and Development of NFPA 654 NFPA 654 was initiated by the Committee on Dust Explosion Hazards in 1943 and originally applied only to the prevention of dust explosions in the plastics industry. As such, it was tentatively
33、adopted in 1944 and ofcially adopted in 1945. Amendments were adopted in 1946, 1959, 1963, and 1970. The 1970 edition was reconrmed in 1975. In 1976, responsibility for NFPA 654 was transferred to the Technical Committee on Fundamentals of Dust Explosion Prevention and Control. The committee prepare
34、d a complete revision for the 1982 edition, the scope of which was expanded to include chemical, dye, and pharmaceutical dusts, since the re and explosion hazards of those dusts are generally the same as for plastic dusts. In 1988, the committee voted to reconrm the text as it appeared in the 1982 e
35、dition, with minor editorial corrections and changes in accordance with the NFPA Manual of Style. In 1994, the standard was revised to improve its usability, adoptability, and enforceability; to update outdated terminology; and to add the NFPA language for equivalency and retroactivity. In addition,
36、 the Technical Committee on Fundamentals of Dust Explosion Prevention and Control added new technologies for explosion prevention to NFPA 69, Standard on Explosion Prevention Systems. The committee also claried the requirements relating to controlling hazardous accumulations of process dust. The 199
37、7 edition was a complete revision that incorporated new processing and explosion protection technologies. The title of the document was revised to reect that the standard encompassed all industries not otherwise included in previous editions of the standard, including the bers industry. The complete
38、 revision incorporated new requirements for design basis of systems and design details for management of change. A complete revision for the 2000 edition incorporated portions of NFPA 650, Standard for Pneumatic Conveying Systems for Handling Combustible Particulate Solids, which was withdrawn in 20
39、00. NFPA 654 retained its title and provided a unied approach for protecting facilities that handled most combustible particulate solids. The combination of documents eliminated the redundancy that previously had existed between the two, similar standards. The 2000 edition of NFPA 654 included speci
40、c requirements related to re protection in addition to the existing explosion protection requirements. The 2006 edition incorporated a complete revision, which introduced a performance-based approach for protecting combustible particulate solids processing facilities. This approach enabled users of
41、the standard to follow the traditional prescriptive method or, for unique situations, allowed the option of a performance-based design. Other changes included updating the standard to the current Manual of Style for NFPA Technical Committee Documents format.PREVENTION OF FIRE AND DUST EXPLOSIONS FRO
42、M COMBUSTIBLE PARTICULATE SOLIDS 654-2 2017 Edition The 2013 edition incorporated updates to denitions to coordinate with extracted text from the source documents in accordance with the Manual of Style for NFPA Technical Committee Documents. The most important change was the inclusion of four method
43、s to determine whether a dust re or explosion hazardous condition exists in a facility. The methods include those based on mass accumulation and risk evaluation as well as the layer depth criterion, which was described in the 2006 edition. Each of the methods was viewed as equivalent in establishing
44、 that a hazardous condition exists for either res or explosions, so the change offered options for users of the standard when determining this fundamental condition. The standard included changes to the housekeeping requirements in two aspects. One involves the determination of a dust hazardous cond
45、ition and prompts a cleaning frequency based on the nature of the dust layer or dust mass. The second change establishes a hierarchy for cleaning methods: vacuuming rst, followed by sweeping or water wash and then, if still necessary, blowing with compressed air, but only under controlled conditions
46、. It is clearly recognized from the incidents reported over the past decade or more that housekeeping has not been adequate in all instances, so establishing a strategy for cleaning frequency based on accumulated dust will improve the practice. In some instances, improper housekeeping has contribute
47、d to incidents, so creating a preferred sequence for cleaning methods will increase safety as well. Safety management elements also were strengthened in the standard, including hazard analysis, management of change, training, emergency procedures, incident investigations, and contractor/subcontracto
48、r safety. Incident investigations indicate that one or more of these elements are reported as contributing factors to various incidents, so including them in the standard stressed their importance in the overall safety culture at a facility. The 2017 edition contains changes designed to begin the al
49、ignment of the standard with the newly issued NFPA 652, Combustible Dust Fundamentals. Denitions used in NFPA 654 have been aligned with those in NFPA 652, and the objectives in Chapter 4 have been updated. Although the requirement to perform a hazard analysis has been part of the standard since the 2006 edition, requirements to perform a dust hazard analysis (DHA) retroactively have been added for those facilities constructed prior to the 2006 edition. The work to align NFPA 654 with NFPA 652 will continue in the next revision cycle.COMMITTEE PERSONNEL
