Our Solutions: Consulting

Preliminary Hazard Assessment

In the Preliminary Hazard Assessment, we go on-site to conduct a high-level assessment of operations. Our experienced engineer will walk through the operations and talk to employees managing and handling the process of concern, which normally involves a flammable or highly hazardous chemical or combustible dust. We will provide a list of samples to take, tests to conduct, and the first tasks to complete toward compliance, as needed. The engineer will spend time on-site reviewing operations and talking to employees. The preliminary hazard assessment will provide input to either a process hazard analysis or a dust hazard analysis as the material properties dictate.

For complex facilities handling various materials of concern in multiple unit operations, knowing where to begin can be the toughest part.


Our Preliminary Hazard Assessment typically includes:

In our Preliminary Hazard Assessment, an experienced engineer will visit your site and:

  • Present an overview of process hazards, testing, and protections

  • Walk-through your operations

  • Talk to employees managing and handling the process of concern

  • Work with you to define the samples to take, the testing to be conducted, and the first tasks to complete

For facilities handling combustible dust, this high-level review provides a roadmap to compliance with current recognized and generally accepted good engineering practice (RAGAGEP) (NFPA 652). The current RAGAGEP outlines four ongoing activities for managing hazards:

  1. Determine the combustibility and explosibility hazards of materials

  2. Identify and assess fire, flash fire, and explosion hazards

  3. Manage the identified hazards

  4. Communicate the hazards to affected personnel

After the initial site visit to a facility handling combustible dust, a test plan will be developed with the end in mind.

The Sigma-HSE Advantage

Our expert consultants apply a practical strategy that draws on our decades of plant experience and in-depth understanding of published industry norms to perform a Preliminary Hazard Assessment of your facility.

Following the Preliminary Hazard Assessment results, we tailor our approach, conducting either a Process Hazard Analysis for flammable or highly hazardous chemicals or a Dust Hazard Analysis for combustible dust concerns.

Request a Preliminary Hazard Assessment Quote

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Frequently asked questions

If you’re introducing a new process to your facility that involves flammable liquids/vapors, highly hazardous chemicals, or a material capable of generating dust, the potential risk of the new process should be evaluated to ensure that the proper precautions are taken to prevent an incident from occurring.

Depending on the results of the Preliminary Hazard Assessment, it may be appropriate to perform a Process Hazard Assessment for flammables or highly hazardous chemicals or a Dust Hazard Analysis for combustible dust concerns. If the Preliminary Hazard Assessment demonstrates no further action is required, it can be used as evidence of due diligence performed to evaluate potential risks for your facility.

Whether dealing with bulk storage of chemicals of concern or lab quantities, there is always a risk involved. A Preliminary Hazard Assessment will help you identify the base risk and ensure you take the proper precautions to avoid incidents.


If you find yourself asking, ‘Do I need a Preliminary Hazard Assessment at my facility?’, connect with us today. One of our subject matter experts will guide you through any questions you may have.

Starting Safely with Preliminary Hazard Assessment for Complex Facilities

The preliminary hazard assessment is an important aspect in keeping people, the environment, and business safe from risks relating to fire and explosions. Learn more about how we can assist you today 

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