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Dust Hazard Analysis

Dust explosions are a common and severe safety threat in industrial equipment, potentially causing casualties, property damage, and production stoppages. To help businesses effectively identify, evaluate, and manage dust explosion risks, we offer professional Dust Hazard Analysis (DHA) Services. Based on international standards such as NFPA 68, NFPA 69, and NFPA 652, combined with industry best practices, we provide comprehensive risk assessment and control solutions to ensure the safety of equipment and working environments.

Our Service Contents

  • Determining Assessment Scope:
    • Assist clients in inventorying all equipment that may generate dust or pose dust accumulation risks, such as storage tanks, mixers, conveyors, dust collectors, etc.
    • Detailed description of production processes and steps involving dust operations.
    • Clearly identify types of dust used in processes, such as metal dust, organic dust, plastic dust, etc.
    • Collect physicochemical property data of dust, including Kst (explosion rate constant), Pmax (maximum explosion pressure), MIE (minimum ignition energy), LEL and UEL (explosion concentration limits), MIT (minimum ignition temperature), etc.
  • Risk Identification:
    • Identify potential hazard sources, including ignition sources (electrostatic sparks, friction heat, hot surfaces, mechanical impacts, etc.) and dust deposition.
    • Evaluate operating environments to confirm if dust can suspend to form explosive dust clouds, analyze equipment enclosure and ventilation conditions.
    • Inspect equipment risks, assess whether equipment has explosion-proof designs such as venting areas, pressure-resistant structures, and flame isolation devices, and check for dust accumulation, air vortexes, or material friction inside equipment.
  • Risk Analysis:
    • Conduct qualitative and quantitative risk analyses, using HAZOP (Hazard and Operability Study) or What-If analysis as guided by NFPA 652 to identify potential hazards in operational processes.
    • Define risk levels (high, medium, low) and document all identified hazardous situations.
    • Calculate the probability and consequences of dust explosions, estimate potential explosion energy using explosion energy calculation formulas, and analyze the impact range of explosion pressure.
    • Evaluate the effectiveness of existing control measures, check explosion-proof designs of equipment (such as pressure relief devices, explosion-proof valves) and protection systems (such as electrostatic grounding, spark detection and suppression devices).
  • Risk Control and Mitigation Measures:
    • Design-level controls: Design appropriate venting areas according to NFPA 68, enhance equipment pressure resistance, install fire valves, explosion isolation devices, etc.
    • Operational-level controls: Regularly inspect grounding devices, clean equipment surfaces and surrounding environments, ensure good ventilation around equipment.
    • Emergency response plans: Develop and practice emergency plans for dust explosions.
  • Continuous Improvement and Monitoring:
    • Regular inspections and tests, detect dust characteristic parameters, maintain pressure relief devices and explosion-proof systems.
    • Update risk assessments when process flows, equipment designs, or dust properties change.
    • Employee training, continuously provide safety training related to dust explosion prevention for operators.

Why Choose Our Services?

  • Professional Compliance: Our Dust Hazard Analysis (DHA) services fully comply with international standards such as NFPA, ensuring the safety and reliability of your equipment and working environment.
  • Rich Experience: Our team has extensive experience in dust explosion prevention, capable of providing effective risk assessment and control solutions.
  • Customized Services: We provide tailored risk assessment and control solutions based on your specific needs and equipment characteristics.