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Process Safety Audits in South Africa

Home ● Process Safety Audits

20+

years of experience

  • Quantitative

Process Safety Audits

Most major incidents don’t happen because people “didn’t care about safety.” They happen because controls drift over time — documents go out of date, shortcuts creep in, alarms get ignored, permits become routine, and the system that looked great on paper slowly stops working in the real world.

That’s why a process safety audit is so valuable.

At MHI Risk Engineers, we conduct independent, thorough audits to evaluate the effectiveness of your Process Safety Management System (PSMS) and identify gaps before they become incidents. Our audits combine document review, site verification, and interviews to confirm whether your process safety controls are designed properly, implemented consistently, and actually working.

If you’re looking for practical improvements in process safety management, and not just another compliance exercise, this is built for you.

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  • What is a PMS

What a process safety audit actually does

A process safety audit answers three hard questions:

  • Do we have the right controls on paper? (standards, procedures, safety reports)
  • Are those controls being followed on site? (real behaviour, real conditions)
  • Are the controls effective? (do they reduce risk where it matters most)

In other words: a process safety audit tests whether your PSMS is real, not just documented.

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  • Who needs this service

When a process safety audit makes sense

A process safety audit is ideal when:

  • you want an independent review of PSMS effectiveness
  • your plant has changed over time and the system has drifted
  • you’ve had a near miss, incident, or rising alarm / permit issues
  • leadership needs confidence that risk is controlled (not assumed)
  • you’re preparing for client, insurer, or governance scrutiny
  • you want a practical improvement plan grounded in real risk
  • What we do:

Our approach: How we conduct Process Safety Audits

We structure audits to be evidence-based and practical, so leadership gets clear priorities—not a list of 200 “nice-to-haves.”

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01

Review key documents and process safety evidence

We review critical documentation such as:

  • P&IDs

  • operating and maintenance procedures

  • safety reports and risk studies (where applicable)

  • training, competency, and contractor controls

  • management of change (MOC) records

  • incident/near-miss learnings and follow-up actions

This establishes what the organisation says it does and what it should be doing.

02

Interview personnel and conduct site walkdowns

We speak with the people who operate and maintain the plant and then verify on site through:

  • interviews across levels (operators, supervisors, maintenance, engineering, HSE)

  • site walkdowns to confirm controls are implemented and practical

  • verification of barriers and critical equipment condition

This is where audits become powerful: you see the difference between “procedure exists” and “procedure works.”

03

Test critical systems and work processes

We test the health of critical process safety systems including:

  • permit-to-work effectiveness (not just forms)

  • SIS basics (where relevant) and governance controls

  • alarm management and how alarms are used operationally

  • isolation, lockout, and control-of-work discipline

  • emergency preparedness interfaces (where relevant)

The goal is to identify control weaknesses that would matter during a real upset condition—not only during routine operations.

04

Benchmark against recognised frameworks

We benchmark your PSMS against established best practice and standards such as:

  • OSHA 1910.119 (Process Safety Management)

  • ISO 45001

  • CCPS RBPS (Risk Based Process Safety)

This gives your audit findings credibility and helps you justify improvements internally.

05

Deliver a clear, risk-prioritised action plan

You don’t need “more findings.” You need clarity.

We deliver:

  • practical findings with evidence

  • risk-ranked priorities (what to fix first)

  • recommended actions that are realistic and measurable

  • inputs for leadership tracking and follow-up governance

  • Certifications

Standards referenced

Our process safety audit methodology is aligned with:

  • OSHA 1910.119

  • ISO 45001

CCPS RBPS

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Get in touch with us

Reach out for any inquiries, support, or to discuss how we can meet your industrial needs.

  • Contact Us

073 300 1142

  • Email

info@mhiriskengineers.com

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FAQ: Process Safety Audits

What is a process safety audit?

A process safety audit is an independent evaluation of whether a facility’s process safety management system is properly designed, implemented, and effective at preventing major incidents (fires, explosions, toxic releases). It looks beyond paperwork and verifies what’s happening in practice through interviews, site walkdowns, and system testing.

Different organisations use different “pillar” models, but a useful four-pillar view is:

  1. Process knowledge & risk understanding (knowing hazards and controls)

  2. Operational discipline & control of work (procedures, permits, competence)

  3. Asset integrity & reliability of safeguards (maintenance, testing, SIS governance)

  4. Leadership & continuous improvement (audits, learning, accountability)

A strong PSMS needs all four—weakness in one pillar often undermines the rest.

A PSMS audit checklist is a structured list of elements to verify, commonly covering:

  • process safety information and document control

  • hazard identification and risk assessment controls

  • management of change (MOC)

  • operating procedures and training/competence

  • mechanical integrity / asset integrity

  • permit-to-work and contractor management

  • emergency planning and response integration

  • incident investigation and learning

  • audits, KPIs, and management review

We use checklists as a tool, but we don’t let them become “tick-box audits.” Evidence and effectiveness come first.

A practical way to group safety audits is:

  1. Compliance audits (are we meeting legal/standard requirements?)

  2. System audits (does the management system work end-to-end?)

  3. Behaviour/field audits (are critical behaviours and controls happening on the ground?)

Process safety audits often blend all three, because major hazard prevention relies on both system design and field execution.

Common categories include:

  • internal audits

  • external/independent audits

  • supplier/contractor audits

  • certification audits (e.g., ISO)

A process safety audit is typically most valuable when independent or at least structured to be objective and evidence-based.

Audit frequency depends on the framework and your internal governance. Many organisations run:

  • periodic full PSMS audits (often every few years), and

  • more frequent element audits (e.g., permit-to-work, MOC, alarms) annually or semi-annually

The best answer is risk-based: high-hazard operations and major changes justify more frequent review.

“Tiers” are commonly used to describe levels of process safety events or indicators (often aligned to industry practice). In simple terms:

  • higher tiers typically represent more severe loss-of-containment events

  • lower tiers capture less severe events and leading indicators

The point is to measure performance and detect drift early—before a tier 1 event occurs.

“7 safety rules” vary by organisation. A common set includes:

  • follow procedures and permits

  • isolate energy sources

  • control ignition sources

  • use correct PPE

  • maintain housekeeping and access

  • report hazards/near misses

  • stop work if unsafe

In process safety audits, we focus on the rules that prevent major incidents (control of work, isolation, ignition control, alarm response discipline).

A practical “4 P’s” model is:

  • People (competence, behaviour, supervision)

  • Plant (equipment integrity, safeguards)

  • Process (procedures, MOC, operating discipline)

  • Place (layout, congestion, environmental factors)

Process safety audits tend to find that “Process” and “Plant” drift quietly until something goes wrong.

This can differ by auditing schools, but it generally refers to principles like ensuring audits are well planned, evidence-based, objective, and followed through. In practical terms, the “E’s” idea is about doing audits that are:

  • structured

  • evidence-driven

  • executed consistently

and acted on (closing the loop)

In HSE, process safety focuses on preventing major accident events such as fires, explosions, and toxic releases caused by loss of containment. It’s different from personal safety (slips/trips), although both matter. Process safety management is about barriers, controls, and systems that prevent catastrophic outcomes.

ISO 45001 focuses on management system requirements. Organisations typically need documented processes covering areas such as:

  • hazard identification and risk assessment

  • operational controls

  • competence and awareness

  • incident investigation and corrective action

  • document control

  • internal audits and management review

The exact “mandatory procedures” can be interpreted differently depending on how you structure your system, but the core intent is consistent: control risks, document what’s needed, and prove the system is effective.

The main purpose is to verify that a process or system:

  • is working as intended

  • is consistently applied

  • produces reliable outcomes

  • and can be improved based on evidence

In process safety terms: to verify your safeguards are real, not assumed.

Process safety means preventing major incidents by controlling:

  • hazardous materials

  • energy sources

  • process deviations

  • and failures of critical safeguards

It’s the discipline of making sure “nothing big goes wrong,” even under abnormal conditions.

To confirm that controls are in place and effective, and to identify gaps so you can reduce risk. The best audits don’t just find problems—they give you a clear path to improvement.

A strong audit process usually includes:

  1. define scope and objectives

  2. plan the audit and gather documents

  3. conduct interviews and site verification

  4. test critical systems and controls

  5. record findings with evidence

  6. develop corrective actions and priorities

follow up to verify close-out

Want a clear, independent view of your PSMS effectiveness?

If you need a process safety audit that goes beyond compliance and gives you a risk-prioritised improvement plan aligned with OSHA 1910.119, ISO 45001, and CCPS RBPS, MHI Risk Engineers can help you identify gaps early and strengthen the controls that prevent major incidents.

Process Safety Audits integrate findings from HAZOP studies, LOPA reviews and Major Hazard Installation (MHI) risk assessments to evaluate the effectiveness of your risk controls. This ensures compliance frameworks translate into real operational risk reduction.