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Question of the Week
  • How often should a revalidation PHA be conducted?

Question: How often should a revalidation PHA be conducted?


OSHA's PSM standard states: "At least every five (5) years after the completion of the initial PHA, the PHA shall be updated and revalidated by a team meeting the requirements in paragraph (e)(4) of this section, to assure that the PHA is consistent with the current process."

However, a periodic PHA revalidation may need to be performed more frequently for any of the following reasons:

  • Cumulative number of changes
  • Major changes
  • Significant incidents or an unfavorable trend
  • Knowledge of significant omissions and deficiencies
  • Concern about the quality of the previous PHA
  • High risk processes
  • Reconciliation of PHA approaches after mergers / acquisitions

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Specialists in Safety, Security and Risk

Primatech specializes in Safety, Security and Risk Management for the process industries. We offer consulting, training courses, webinars, and software to assist our clients in identifying and reducing the risk of catastrophic accidents posed by hazardous materials used in their operations. Our services and products help companies to protect employees, the public and the environment as well as prevent damage to facilities, process equipment and company reputations, and improve productivity and quality. We help companies comply with the OSHA Process Safety Management (PSM) standard, EPA Risk Management Program (RMP) rule, and other government regulations, industry guidelines and requirements.

Our capabilities include:

  • Process Hazard Analysis (PHA), e.g., HAZOP Studies
  • Layers of Protection Analysis (LOPA)
  • Safety Instrumented Systems (SIS) - IEC 61511 / ISA 84
  • SIL Verification
  • PSM and RMP Compliance Audits and Program Assessments
  • OSHA Chemical National Emphasis Program (NEP) Audit Preparation and Assessment
  • PSM Program Development and Implementation
  • RMP Program Development and Implementation
  • Mechanical Integrity Program Development and Implementation
  • Mechanical Integrity Program Audits and Assessments
  • Management of Change (MOC) for Process Safety
  • Operating and Maintenance Procedures Development
  • Human Factors and Human Error Analysis
  • Facility Siting Analysis
  • Dispersion and Consequence Modeling
  • Probability Modeling
  • Quantitative Risk Assessment
  • Emergency Response Program Development and Implementation
  • Cyber Security Management
  • Process Security Management
  • Security Vulnerability Analysis for Deliberate Acts Including Terrorism
  • Expert Witness Testimony and Litigation Support

Primatech is an independent company with no vested interests and is seen, therefore, to deliver work recognized as objective and unbiased.

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Our services and products enable our clients to achieve their risk, safety and security objectives more efficiently and effectively.




Primatech's software is a proven asset for completion of your risk and safety studies. We have successfully produced process safety software for 25 years. Current products include PHAWorks®, LOPAWorks®, AUDITWorks and Tracker.




Primatech Training Institute (PTI) provides the most complete and up-to-date training courses for process safety, security and risk management. Both public and in-house deliveries are offered.




Primatech is developing a series of webinars for on-demand viewing. Please check back for details.