Process Hazard Analysis (PHA)

Arthian’s consultants facilitate Process Hazard Analysis (PHA) studies to systematically identify risks, evaluate safeguards, and strengthen compliance across complex operations.

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Safeguarding People, Assets, and the Environment

Process Hazard Analysis (PHA) is a structured, proactive approach to identifying, evaluating, and controlling hazards in processes involving hazardous chemicals or complex operations. It is a cornerstone of Process Safety Management (PSM) and essential for compliance with UK regulations such as COMAH and DSEAR, as well as international standards like OSHA 1910.119.

PHA helps organizations:

Prevent major accidents such as fires, explosions, and toxic releases
Protect personnel and surrounding communities
Ensure regulatory compliance
Maintain operational integrity and reduce downtime

Why is PHA Important?

Industrial processes carry inherent risks. A robust PHA:

Identifies potential hazards before they occur
Evaluates the likelihood and severity of incidents
Guides the implementation of engineering and administrative controls
Supports continuous improvement and regulatory compliance

Our Approach at Arthian

We deliver structured, collaborative PHA studies tailored to your site and sector. Our multi-disciplinary team combines engineering expertise, regulatory knowledge, and facilitation skills to ensure comprehensive hazard identification and risk assessment.

Key Features of Our PHA Service

PHA Methodologies We Use

Industries We Support

Key Features of Our PHA Service

The key features of our PHA service include:

Certified Facilitation & Expert Teams
Accredited HAZOP leaders and process safety engineers ensure rigorous, unbiased analysis.
Regulatory Alignment & Best Practice
Full compliance with COMAH, DSEAR, IEC 61511, and OSHA PSM standards.
Comprehensive Documentation & Action Tracking
Clear, auditable reports with prioritized recommendations and digital tracking tools.
Integration with Advanced Risk Tools
Linking PHA outcomes to LOPA, SIL verification, and functional safety assessments.
Collaborative Workshops
Engaging your operations, maintenance, and engineering teams to foster a strong safety culture.
Lifecycle Support
From initial design reviews to operational revalidations, ensuring ongoing relevance.

PHA Methodologies We Use

Our team utilises a range of PHA technologies, which include:

HAZOP (Hazard and Operability Study): Node-by-node review for complex processes.
What-If Analysis: Scenario-based brainstorming for early design phases.
FMEA (Failure Modes and Effects Analysis): Component-level failure analysis.
LOPA (Layer of Protection Analysis): Semi-quantitative safeguard assessment.
Fault Tree & Bowtie Analysis: Visual representation of risk pathways and barriers.
Checklist & Compliance Reviews: Ensuring alignment with regulatory requirements.

Industries We Support

At Arthian, we’re committed to helping all industries operate as safely as possible, but we have particular experience in:

Chemicals & Petrochemicals – Bulk chemical production, refining, and storage.
Food & Beverage and Distilling – Managing flammable solvents and thermal processes.
Energy & Renewables – Hydrogen, biofuels, and emerging technologies.
Pharmaceuticals & Life Sciences – Complex batch processes and containment systems.
Manufacturing & Waste Management – Hazardous waste treatment and recycling.
Utilities & Infrastructure – Water treatment, power generation, district heating.

Key Features of Our PHA Service

The key features of our PHA service include:

Certified Facilitation & Expert Teams
Accredited HAZOP leaders and process safety engineers ensure rigorous, unbiased analysis.
Regulatory Alignment & Best Practice
Full compliance with COMAH, DSEAR, IEC 61511, and OSHA PSM standards.
Comprehensive Documentation & Action Tracking
Clear, auditable reports with prioritized recommendations and digital tracking tools.
Integration with Advanced Risk Tools
Linking PHA outcomes to LOPA, SIL verification, and functional safety assessments.
Collaborative Workshops
Engaging your operations, maintenance, and engineering teams to foster a strong safety culture.
Lifecycle Support
From initial design reviews to operational revalidations, ensuring ongoing relevance.

PHA Methodologies We Use

Our team utilises a range of PHA technologies, which include:

HAZOP (Hazard and Operability Study): Node-by-node review for complex processes.
What-If Analysis: Scenario-based brainstorming for early design phases.
FMEA (Failure Modes and Effects Analysis): Component-level failure analysis.
LOPA (Layer of Protection Analysis): Semi-quantitative safeguard assessment.
Fault Tree & Bowtie Analysis: Visual representation of risk pathways and barriers.
Checklist & Compliance Reviews: Ensuring alignment with regulatory requirements.

Industries We Support

At Arthian, we’re committed to helping all industries operate as safely as possible, but we have particular experience in:

Chemicals & Petrochemicals – Bulk chemical production, refining, and storage.
Food & Beverage and Distilling – Managing flammable solvents and thermal processes.
Energy & Renewables – Hydrogen, biofuels, and emerging technologies.
Pharmaceuticals & Life Sciences – Complex batch processes and containment systems.
Manufacturing & Waste Management – Hazardous waste treatment and recycling.
Utilities & Infrastructure – Water treatment, power generation, district heating.

Frequently Asked Questions

What is a Process Hazard Analysis (PHA)?

A PHA is a structured study used to identify, evaluate, and control risks in complex industrial processes. It helps organisations prevent incidents, protect people, and comply with regulatory requirements.

Why is PHA important for my business?

PHA ensures that hazards are systematically identified and safeguards are evaluated. This reduces the likelihood of accidents, improves safety culture, and demonstrates compliance with standards such as OSHA PSM, COMAH, and DSEAR.

How often should a PHA be conducted?

PHAs should be performed during design stages, before major process changes, and reviewed periodically (typically every 5 years or as required by regulation).

Can PHA support COMAH or OSHA PSM compliance?

Absolutely. PHA is a core requirement under both COMAH and OSHA PSM regulations, and our studies are tailored to meet these standards.

Get in Touch

We’d love to hear from you – whether you have a question, a project in mind, want to explore job opportunities, or just want to say hello.

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Process Hazard Analysis (PHA)

Safeguarding People, Assets, and the Environment

Why is PHA Important?

Our Approach at Arthian

Key Features of Our PHA Service

PHA Methodologies We Use

Industries We Support

Key Features of Our PHA Service

PHA Methodologies We Use

Industries We Support

Frequently Asked Questions

What is a Process Hazard Analysis (PHA)?

Why is PHA important for my business?

How often should a PHA be conducted?

Can PHA support COMAH or OSHA PSM compliance?

Get in Touch