DHA (Dust Hazard Analysis) is now one of the recognized PHA methods for combustible dust in North America, and its systematic thinking is also widely accepted by Chinese companies. Zhunyun consultants can provide detailed analysis according to the actual situations, especially the desktop DHA can be used as an input for detailed design to help enterprises to control actual dust explosion risks as well as regulatory compliance.

The steps of DHA include:

1) Collect process safety information

2) Break the process down into small nodes, and usually equipment or pipelines

3) Identify combustible dust in these units

4) Determine if there is an oxidizing atmosphere

5) Identify reliable ignition sources

6) Analyze credible dust dispersion mechanisms

7) Identify possible ignition causes

8) List current safeguards

9) Assess whether current risks are acceptable and consistent with industry practice (RAGAGEP）

10) Put forward feasible suggestions according to NFPA and local standards