Fire safety isn’t just a regulatory requirement—it’s a business imperative, especially in facilities that handle combustible dust. For those in the food and agriculture industry, understanding standards like NFPA 660 is critical to protect people, property, and productivity. At KC Supply Co., we recognize that compliance can be complex, so we’ve put together a clear guide to help you understand what NFPA 660 is, why it matters, and how it affects your operations.

What Is NFPA 660?

NFPA 660 is a standard developed by the National Fire Protection Association that provides guidance on how to manage combustible dust hazards in food processing and agricultural facilities. Dust from grain, flour, sugar, feed, spice, and other organic products can become explosively combustible under the right conditions. NFPA 660 outlines a framework for identifying, evaluating, and controlling these hazards to reduce the risk of fire and explosion.

In essence, NFPA 660 standardizes how facilities should approach dust hazard analysis (DHA), housekeeping, electrical equipment, ventilation, and operational safety in environments where combustible dust can accumulate.

Why NFPA 660 Matters for Food and Ag

In many food and agriculture settings, combustible dust is generated during handling, processing, conveying, and cleaning. Left unchecked, dust can settle on surfaces, form layers, and create hidden hazards. A single ignition source—such as a hot surface, spark from equipment, or static electricity—can trigger a devastating explosion.

NFPA 660 isn’t just a guideline; it’s a blueprint for proactive hazard management. Compliance helps protect workers, minimizes downtime due to accidents, and reduces insurance costs tied to dust hazards. It also helps operations maintain continuity after inspection or regulatory review.

Key Components of NFPA 660

1. Dust Hazard Analysis (DHA)

One of the most important requirements of NFPA 660 is a Dust Hazard Analysis. A DHA is a systematic review of your facility that identifies where dust might pose a risk. It involves understanding:

  • Where dust is generated

  • How dust travels and settles in the facility

  • Potential ignition sources

  • Levels of housekeeping effectiveness

The goal is to identify hazards so that you can implement engineering, administrative, and safety controls.

2. Housekeeping Practices

Cleaning up dust isn’t just good housekeeping—it’s a safety essential. NFPA 660 emphasizes removal of settled dust from elevated surfaces, equipment, and hidden spaces. Proper housekeeping reduces the amount of fuel available for a potential explosion.

Best practices include:

  • Vacuum systems designed for combustible dust

  • Regular cleaning schedules

  • Trained personnel who know how to safely remove dust

  • Avoiding compressed air for cleaning without proper precautions

3. Equipment and Electrical Safety

Not all equipment is created equal when it comes to dusty environments. NFPA 660 requires the use of properly rated electrical components and machinery where dust can accumulate. Non-rated equipment can produce sparks or heat that become ignition sources in a dust-laden environment.

Ensure that:

  • Motors and controls are properly enclosed

  • Belts and couplings are maintained to prevent heat buildup

  • Static control measures are in place

Implementing Compliance in Your Facility

Complying with NFPA 660 doesn’t have to be overwhelming, but it does require a plan. Here are steps to help guide your compliance efforts:

  1. Start with a Dust Hazard Analysis
    A detailed DHA is the foundation of compliance. It reveals your risk profile and sets your priorities.

  2. Develop Written Procedures
    Your compliance plan should include documented procedures for inspections, cleaning, maintenance, and training.

  3. Train Your Team
    Workers need to understand dust hazards, how to recognize them, and how to respond safely. Training builds awareness and empowers safe behavior.

  4. Invest in the Right Tools and Equipment
    Use vacuums, filters, guards, and electrical components designed for combustible dust environments. Upgrading equipment to meet NFPA 660 expectations can pay dividends in safety and reliability.

  5. Monitor and Adjust
    Conditions change as operations evolve. Regularly revisit your hazard analysis and housekeeping plan to ensure controls remain effective.

Conclusion

NFPA 660 is more than a standard—it’s a roadmap for protecting your people, your facility, and your business from one of the most overlooked hazards in the food and agriculture industry: combustible dust. By understanding and applying NFPA 660’s principles, you create a safer work environment, improve compliance, and reduce risk.

At KC Supply Co., we support our customers with the solutions and expertise needed to implement effective dust control and safety measures. If you’re ready to take the next step toward NFPA 660 compliance, we’re here to help you every step of the way.