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A Simple Review Of...NFPA 652

Date: 4/7/2016
Posted by: Brian Mathews

NFPA 652

On September 7, 2015 the NFPA 652 Standard on the Fundamentals of Combustible Dust 2016 Edition became effective. This Standard will bring about a significant change to the dust collection industry by binding the various Guidelines and Standards from the NFPA related to dust collection together and become the overarching Standard for the industry. The following is a list of Guidelines and Standards from the NFPA related to the dust collection industry that will now be under the NFPA 652 umbrella:

  • NFPA 61 Agricultural and Food Processing
  • NFPA 68 Explosion Protection by Deflagration Venting
  • NFPA 69 Explosion Prevention Systems
  • NFPA 70 National Electrical Code, Articles 501, 502, 503
  • NFPA 91 Exhaust Systems for Air Conveying
  • NFPA 484 Combustible Metals
  • NFPA 499 Classification of Combustible Dusts and of Hazardous (Classified) Locations
  • NFPA 654 Manufacturing, Processing, and Handling of Combustible Particulate Solids
  • NFPA 655 Sulfur Fires and Explosions
  • NFPA 664 Wood Processing and Woodworking Facilities

Contained within NFPA 652 are many new requirements that place more responsibility on the owner/operator of a facility and the Authority Having Jurisdiction (AHJ). Particularly, the owner/operator is now responsible for determining whether the materials being processed or generated in their facility are combustible or explosible. If the materials are combustible or explosible, then a Dust Hazard Analysis (DHA) shall be completed in accordance with the guidelines of NPFA 652 Chapter 7. The purpose of the DHA is to identify hazards contained within a facility or process and document how the hazards are being controlled. The DHA must be performed by a qualified individual or a team led by a qualified individual and all of the results of the DHA must be documented. For a given facility, a DHA will include a general overview the entire facility where an explosion hazard exists followed by an evaluation of the material(s) handled, process(es) where combustible dust is present, and buildings or building compartments where combustible dust is present.

The requirement for DHA applies not only to new processes or facility upgrades; but it applies retroactively to existing processes as well. Specifically, NFPA 652 states that “the owner/operator shall schedule and complete DHAs of existing processes and facility compartments within a 3-year period from the effective date of the standard.”

This means that as of September 7, 2018 all facilities that process or generate combustible dust must have a documented DHA on file or they will be at risk of penalties from the AHJ.

If your facility needs to have a DHA completed for a new or existing process generating combustible dust, send an e-mail to and one of our qualified engineers will be able to lead or assist on a DHA for your facility.

Scientific Dust Collectors

4101 West 126th Street
Alsip, IL 60803-1901

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Phone: 708.597.7090
Fax: 708.597.0313

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