Process Hazard Analysis - PHA

Why do I need a process hazard analysis?

A process hazard analysis (PHA) is required by OSHA’s process safety management (PSM) regulation for PSM-covered processes, NFPA 654 and other NFPA regulations for combustible dust processes. It is critical to pinpoint weaknesses in the design of facilities and processes that could lead to chemical releases, fires or explosions. OSHA’s inspection results from the National Emphasis Programs launched for refineries in 2007, and the chemical industry in 2009, demonstrate that the quality of PHAs continues to be a weak link in the management of process safety issues.

"OSHA has found multiple violations of the mechanical integrity, process safety information, and process hazard analysis elements of the PSM Standard. This is generally consistent with the frequency ranking of PSM element citations found in the Refinery NEP.” – OSHA 6th Global Congress on Process Safety, Presentation"

by Mike Marshall/Lisa Long (March 2010)


Experienced Professionals

ioMosaic is a PHA leader who can provide senior process safety engineers to prepare, organize and lead PHAs utilizing your internal technical and operations staff. We also provide a report to document the PHA and associated recommendations.

  • Our experts are knowledgeable in recognized and generally accepted good engineering practices 
  • Each member of our team is a trained and proven PHA leader
  • Our professionals have extensive experience using various industry-recognized methodologies such as hazard and operability study, “What-If” Checklist, fault tree analysis, layer of protection analysis, failure mode and effects analysis and inherently safer technology

PHA Tools

Process Safety Office™ component PHAGlobal® is a process hazard analysis documentation software that simplifies recording of findings and tracking follow-up from PHAs. It eliminates the need for any special application software when working with the results. The learning curve for documentation is virtually non-existent, because of the use of standard Excel functions. PHA Global will make it easier to comply with codes and standards that require PHAs, such as OSHA PSM, EPA RMP and NFPA 654. Combine with Process Safety Enterprise® for a fully-integrated PSM solution.

PHA methodologies include:

  • Hazard and operability studies
  • Layer of protection analyses
  • Failure modes and effects analyses
  • What-If and Checklist analyses