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    Process Safety ManagementPSM

    Definition

    Process Safety Management — coordinated arrangements for preventing major process incidents involving hazardous substances.

    Editorial definition: The QHSE Standard, updated 3 October 2026 · https://qhsetech.com/glossary/psm

    Scope: In US OSHA usage, 29 CFR 1910.119 applies to specified covered processes, with thresholds and exclusions.

    Example for your evaluation: Ask how a hazard-study finding is connected to actions, change records and supporting evidence.

    Sources checked: . Examples are editorial illustrations.

    What OSHA 1910.119 covers

    In US law, process safety management means 29 CFR 1910.119, process safety management of highly hazardous chemicals. It applies to a process involving a chemical at or above the threshold quantities in its Appendix A, and to a process involving 10,000 pounds or more of a Category 1 flammable gas or a flammable liquid with a flashpoint below 100 °F on site in one location, with exceptions such as hydrocarbon fuels used solely for workplace consumption. Retail facilities and oil or gas well drilling or servicing operations are among the exclusions.

    The standard's paragraphs are its elements: employee participation, process safety information, process hazard analysis, operating procedures, training, contractors, pre-startup safety review, mechanical integrity, hot work permits, management of change, incident investigation, emergency planning and response, compliance audits and trade secrets.

    Several carry fixed intervals that software can track. Process hazard analyses are updated and revalidated at least every five years; the employer certifies at least every three years that compliance has been evaluated; incident investigations start no later than 48 hours after the incident. Mechanical integrity applies to named equipment: pressure vessels and storage tanks, piping systems, relief and vent systems, emergency shutdown systems, controls and pumps.

    Sources opened :

    What a PSM record set holds in software

    • A covered-process register: chemicals, maximum quantities and the threshold each is compared with.
    • Process hazard analysis studies with method, team, recommendations, their resolution and the revalidation due date.
    • A mechanical integrity equipment list with the inspection and test records for each item.
    • Management of change and pre-startup safety review records linked to the process safety information they update.
    • Hot work permits, incident investigations and emergency plans for the covered process.
    • Compliance audit certifications at the three-year interval, with the actions raised by each audit.

    OSHA PSM or EPA RMP?

    EPA's Risk Management Program rule, made under section 112(r) of the Clean Air Act, is a separate regime. It applies to facilities holding more than a threshold quantity of a regulated substance in a process and requires a Risk Management Plan submitted to EPA: a hazard assessment with worst-case and alternative release scenarios and a five-year accident history, a prevention programme and an emergency response programme, revised and resubmitted every five years. EPA says the plans inform local fire, police and emergency responders and the public; PSM is an OSHA workplace standard. In Great Britain, major-accident sites come under a different law again, the Control of Major Accident Hazards (COMAH) Regulations 2015, on which HSE publishes guidance.

    A hypothetical example: a relief valve change, from request to revalidation

    The following case is made up to show how the PSM records depend on each other and is not drawn from any organisation. A plant holds a flammable liquid above the threshold quantity, so the storage and transfer process is covered. After a capacity review, an engineer asks to replace a relief valve with one of a different size and set pressure. The request starts a management of change record, because the equipment and its design basis are changing, and the engineer lists the process safety information that the new valve touches: the relief system design basis, the piping and instrument diagrams and the equipment specification.

    A short team checks whether the existing process hazard analysis covers an overpressure scenario with the new valve, and adds a recommendation when it does not. The operating procedure for the transfer is edited, operators who work on it are told about the change before it goes live, and the new valve is added to the mechanical integrity list with its own test interval. Because the change alters process safety information, a pre-startup safety review confirms the installation before the process restarts. The revalidation date for the hazard analysis is recorded against the process, and the open recommendation is tracked until it is closed. Years later, an inspector or an auditor can follow the valve from the request to each of these records.

    Common misunderstandings about PSM

    • A site is not covered because it handles hazardous chemicals. Coverage is decided process by process, by the chemical and the quantity in that process, and the covered-process register is the first record a software tool should hold.
    • PSM is not one plan or one document. The standard has fourteen elements, each producing its own records on its own cycle, and a single binder or a single dashboard does not show that every element is current.
    • A hazard analysis is not a one-off. It has to be updated and revalidated at intervals, and the resolution of each recommendation has to be documented, so the open actions matter as much as the study report.
    • A permit, a change form or an audit checklist is not compliance. The standard is a legal duty on the employer, so a product can hold the records but cannot discharge the duty.
    • The term does not mean every process safety programme. Outside the United States, major-hazard sites fall under other regimes, so a requirement to follow OSHA's standard should not be assumed from a general process safety label.

    How PSM relates to other glossary terms

    PSM names several processes that also have their own glossary entries, and the standard fixes how they must be connected for covered processes.

    • Management of change: the element that ties a proposed change to the process safety information, the hazard analysis, procedures and training it affects.
    • Permit to work: the general control for hazardous jobs, of which the hot work permit required by the standard is one case.
    • Lockout/tagout: a separate standard for hazardous energy during servicing, which operates alongside PSM and not within it.
    • Near miss: an event type that PSM brings into formal investigation when it could reasonably have resulted in a major release.
    • ISO 45001: a management system standard that sits around the safety programme, where PSM is a regulation for a narrower class of process.
    • HIRA: the general process of identifying hazards and assessing risk, which PSM narrows to a process hazard analysis for covered processes.
    • Bowtie analysis: a way of mapping the barriers between a hazard and a major outcome, which can sit beside a process hazard analysis.
    • Root cause analysis: the analysis step inside the incident investigations that PSM requires for incidents that could reasonably have led to a major release.

    Records and evidence that usually exist for PSM

    • A statement of why each process is covered or excluded, with the chemical, the maximum quantity and the threshold.
    • Process safety information for the process: hazard data, technology and equipment, kept current as changes are made.
    • Hazard analysis reports, with the method, the team, the recommendations and the documented resolution of each.
    • Operating procedures with their review records, and training records for the people who follow them.
    • Inspection and test records for each item on the mechanical integrity list, including deficiencies and how they were corrected.
    • Change requests, pre-startup reviews, hot work permits and contractor records for the covered process.
    • Incident investigation reports with their recommendations, and compliance audit reports with the actions raised.

    What a software tool needs to capture for PSM

    • A covered-process register that holds quantities against thresholds, so that a change in inventory can prompt a new coverage decision.
    • Links from each equipment item to the process, the inspection interval and the last test result, with overdue items visible without a search.
    • A change record that points at the process safety information, the hazard analysis, the procedures and the training it affects, and cannot close until each has been addressed.
    • Hazard analysis recommendations tracked as actions with owner, due date and the documented reason for any that are not adopted.
    • Clock-based reminders for revalidation, audit certification and procedure review, tied to the process they relate to.
    • An incident record that shows when the investigation began, so the interval can be checked.
    • A read-only export of the full history for one process, which an auditor can read without access to the system.

    Catalog profiles documenting PSM elements

    Each profile documents one or two elements, not the whole standard.

    Same rule for every product: tagged “Process Safety”, “Barrier Management”, “Risk Management”, “Risk Assessment”, “Control of Work”, “Permit to Work” or “Asset Integrity”, with a sourced process safety (PHA, barrier or management-of-change) capability in its record, or one the vendor stated to us, labelled as vendor-stated. Documented and conditional capabilities qualify; check the linked scope before treating a module as included.

    Tekmon pays for a sponsored placement (above); its place in this list follows the same rule as every entry. How lists are ordered

    All 23 matching profiles are shown. Documentation review, not hands-on testing or a claim of compliance.

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    Frequently asked questions

    Who falls within US OSHA PSM?

    Assess the process against 1910.119's scope, chemical thresholds and exclusions. A site-wide industry label is insufficient.

    Is PSM the same as Seveso?

    They are different legal frameworks. Determine applicability and duties separately for the relevant jurisdiction.

    What should a software demo show?

    Follow a process-hazard finding through action review and a related change. Check the separation between software records and engineering decisions.

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