🔍 HAZOP – Hazard & Operability Study

Ask the Right Questions. Find the Risk. Protect the Process.

The HAZOP (Hazard and Operability Study) Course is designed to provide engineers, process professionals, safety teams, operations personnel, maintenance teams, and project professionals with practical knowledge of conducting and participating in structured HAZOP studies.

Participants learn how HAZOP systematically examines process deviations, identifies potential hazards, evaluates their consequences, reviews existing safeguards, and develops recommendations for reducing risk. Through practical examples, process scenarios, guide-word exercises, and team-based case studies, participants develop the skills needed to contribute effectively to HAZOP studies throughout the process lifecycle.

🔍 What You’ll Learn

🧠 HAZOP Fundamentals

Understand the purpose, principles, terminology, methodology, and applications of HAZOP.

📐 Process & Design Understanding

Learn how process information, P&IDs, process descriptions, equipment data, and operating conditions support a HAZOP study.

⚠️ Hazard Identification

Systematically identify potential hazards and unsafe process conditions.

🔄 Deviation Analysis

Learn how guide words are used to identify deviations from intended process conditions.

🛡️ Safeguard Evaluation

Understand how existing prevention, detection, and mitigation safeguards are considered.

📝 Recommendation Development

Learn how to develop clear, practical, and risk-based recommendations.

🛡️ Key Training Areas

Participants are introduced to:

• 🔍 HAZOP principles

• 🏭 Process safety fundamentals

• 📐 P&ID interpretation

• 🧩 HAZOP nodes

• 🔄 Design intent

• 🗣️ HAZOP guide words

• ⚠️ Process deviations

• 📊 Consequence analysis

• 🔍 Cause identification

• 🛡️ Existing safeguards

• 📈 Risk evaluation

• 📝 Recommendation development

• 👥 HAZOP team roles

• 📋 HAZOP worksheets

• 🔄 Follow-up and action tracking

• 🚨 Emergency scenarios

• 📑 HAZOP documentation

🧩 The HAZOP Method

Design Intent → Deviation → Cause → Consequence → Safeguard → Recommendation

A structured HAZOP study examines what could happen when a process deviates from its intended operating condition.

01 — DESIGN INTENT
Understand what the process or node is designed to achieve.

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02 — GUIDE WORD
Apply a systematic guide word.

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03 — DEVIATION
Identify what could deviate from the intended condition.

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04 — CAUSE
Ask what could cause the deviation.

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05 — CONSEQUENCE
Determine what could happen if the deviation occurs.

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06 — SAFEGUARD
Identify existing controls and protective measures.

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07 — RISK
Consider the significance of the scenario using the applicable risk methodology.

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08 — RECOMMENDATION
Develop an appropriate action where additional risk reduction is required.

🗣️ HAZOP Guide Words

Simple Words. Powerful Questions.

Participants learn how guide words can systematically challenge the design intent.

The Guide Words Help the Team Ask: “What If?”

⚙️ HAZOP Parameters

Depending on the process, participants may consider deviations involving:

🌊 FLOW
More, less, no flow, reverse flow.

🔥 TEMPERATURE
Higher, lower, early, late.

📈 PRESSURE
More, less, loss of pressure, unexpected pressure.

🧪 COMPOSITION
Wrong material, contamination, concentration changes.

📦 LEVEL
High level, low level, no level control.

🔄 REACTION
Unexpected reaction, incomplete reaction, excessive reaction.

⏱️ TIME
Early, late, short duration, extended duration.

⚡ ENERGY
Loss or unexpected addition of electrical, thermal, mechanical, or other energy.

📐 HAZOP Node Selection

Break the Process Into Manageable Sections

A HAZOP study typically divides a process into defined nodes or sections.

Examples may include:

• Feed systems

• Pipelines

• Pumps

• Reactors

• Storage tanks

• Heat exchangers

• Compressors

• Distillation systems

• Utilities

• Transfer systems

• Product handling

• Waste systems

For each node, the team establishes the design intent before systematically examining potential deviations.

🔍 Cause Identification

Every Deviation Has a Story Behind It

Participants learn to explore possible causes such as:

⚙️ EQUIPMENT FAILURE
Pump failure, valve failure, instrument failure, or mechanical breakdown.

👷 HUMAN FACTORS
Incorrect operation, misunderstanding, procedural errors, or communication failures.

⚡ UTILITY FAILURE
Loss of power, cooling water, instrument air, steam, or other essential utilities.

🧪 PROCESS CONDITIONS
Unexpected reaction, contamination, incorrect composition, or process instability.

🔧 MAINTENANCE
Incorrect assembly, inadequate maintenance, or equipment condition.

🌡️ ENVIRONMENTAL CONDITIONS
Temperature, weather, external events, or other relevant influences.

💥 Consequence Analysis

What Happens If the Deviation Occurs?

Participants learn to consider potential consequences such as:

• 🔥 Fire

• 💥 Explosion

• 💨 Toxic release

• 🧪 Chemical exposure

• ⚙️ Equipment damage

• 📈 Overpressure

• 🌡️ Temperature excursion

• 🌊 Loss of containment

• 🏭 Production interruption

• 🌱 Environmental impact

• 👷 Personnel injury

• 🏢 Asset damage

Think Beyond the First Event — Consider the Full Consequence Chain.

🛡️ Safeguard Identification

What Stops the Problem From Becoming an Incident?

The HAZOP team identifies existing safeguards such as:

🔔 ALARMS
Warn operators of abnormal conditions.

🛑 TRIPS & INTERLOCKS
Automatically or procedurally prevent dangerous process conditions.

💨 RELIEF SYSTEMS
Provide protection against applicable overpressure scenarios.

🔒 ISOLATION
Limits the spread of hazardous conditions.

🧯 FIRE PROTECTION
Helps control fire-related consequences.

👷 OPERATING PROCEDURES
Provide instructions for normal and abnormal situations.

🚨 EMERGENCY SYSTEMS
Support mitigation and response.

📊 Risk Assessment

Understand the Risk Before Recommending the Action

Participants learn how HAZOP findings can be evaluated using an organisation’s established risk methodology.

Risk assessment may consider:

⚠️ CONSEQUENCE
How serious could the outcome be?

📈 LIKELIHOOD
How likely is the initiating event or scenario?

🛡️ SAFEGUARDS
What controls already exist?

📊 RISK LEVEL
What is the resulting level of risk?

🛠️ ACTION
Is additional risk reduction required?

Important: HAZOP does not replace the organisation’s formal risk-assessment methodology. Risk-rating criteria should follow the applicable company and regulatory requirements.

📝 HAZOP Worksheet

Turn Discussion Into a Structured Record

A typical HAZOP worksheet may include:

👥 HAZOP Team Roles

Good HAZOP Is a Team Exercise

An effective HAZOP team may involve:

👨‍💼 HAZOP LEADER
Facilitates the study and maintains a structured process.

⚙️ PROCESS ENGINEER
Provides process knowledge and design intent.

🔧 DESIGN / ENGINEERING REPRESENTATIVE
Provides technical and equipment information.

👷 OPERATIONS REPRESENTATIVE
Provides practical operating experience.

🛠️ MAINTENANCE REPRESENTATIVE
Provides equipment-maintenance and reliability insight.

🦺 SAFETY / HSE PROFESSIONAL
Provides hazard, risk, and safety expertise.

📐 INSTRUMENTATION / CONTROL SPECIALIST
Provides insight into alarms, controls, interlocks, and instrumentation.

Different Perspectives Reveal Different Hazards.

📚 HAZOP Input Documents

Participants learn the importance of having appropriate process information available, which may include:

• P&IDs

• Process flow diagrams

• Process descriptions

• Equipment specifications

• Operating procedures

• Control philosophy

• Instrumentation information

• Material information

• Safety Data Sheets where relevant

• Design specifications

• Process conditions

• Previous risk studies

• Incident and near-miss information

Better Information Creates Better HAZOP Discussions.

🔄 HAZOP Action Tracking

The Study Doesn’t End With the Last Recommendation

Participants learn the importance of:

📝 RECORD
Capture the recommendation clearly.

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👤 ASSIGN
Identify the responsible person or team.

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📅 PRIORITISE
Establish an appropriate completion timeframe.

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🛠️ IMPLEMENT
Complete the required action.

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🔍 VERIFY
Confirm that the action has been effectively addressed.

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✅ CLOSE
Maintain appropriate evidence and documentation.

🎯 Learning Outcomes

After completing the course, participants will be able to:

• Understand the purpose and principles of HAZOP.

• Explain the HAZOP study methodology.

• Understand design intent and process nodes.

• Use HAZOP guide words effectively.

• Identify process deviations.

• Identify potential causes of deviations.

• Evaluate potential consequences.

• Recognise existing safeguards.

• Participate effectively in HAZOP team discussions.

• Understand basic HAZOP risk evaluation.

• Develop clear and practical recommendations.

• Use a structured HAZOP worksheet.

• Understand HAZOP action tracking.

• Support follow-up and closure of recommendations.

• Apply HAZOP thinking to process-safety scenarios.

👷 Who Can Attend?

This course is suitable for:

Process Engineers • Chemical Engineers • Project Engineers • Operations Personnel • Maintenance Engineers • Instrumentation Engineers • HSE Professionals • Safety Engineers • Plant Managers • Production Managers • Supervisors • Process Technicians • HAZOP Team Members

🧠 Training Approach

Learn → Question → Analyse → Evaluate → Recommend

The course combines:

📚 Classroom Learning
HAZOP concepts, terminology, and methodology.

📐 P&ID Exercises
Understanding process information and identifying HAZOP nodes.

🗣️ Guide-Word Exercises
Practising systematic deviation identification.

🔍 Case Studies
Analysing realistic process scenarios.

👥 Team Exercises
Participating in structured HAZOP discussions.

📝 Worksheet Exercises
Recording causes, consequences, safeguards, and recommendations.

🔄 HAZOP Study Cycle

Systematic Questions Create Better Process Safety Decisions

📐 01 — DEFINE
Define the process and establish the study scope.

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🧩 02 — SELECT NODE
Choose the process section to be examined.

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🎯 03 — DEFINE INTENT
Understand what the node is intended to do.

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🗣️ 04 — APPLY GUIDE WORD
Systematically challenge the design intent.

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⚠️ 05 — IDENTIFY DEVIATION
Determine how the process could deviate.

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🔍 06 — FIND CAUSES
Identify potential initiating causes.

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💥 07 — ANALYSE CONSEQUENCES
Determine what could happen.

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🛡️ 08 — REVIEW SAFEGUARDS
Identify existing preventive and mitigating controls.

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📊 09 — ASSESS RISK
Evaluate the scenario using the applicable methodology.

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📝 10 — RECOMMEND
Develop additional actions where required.

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🔄 11 — FOLLOW UP
Track recommendations through completion and verification.

🏆 Key Benefits

For Engineers

Develop a structured method for identifying process hazards and design weaknesses.

For Operations Teams

Improve understanding of process deviations, abnormal conditions, and safeguards.

For Safety Professionals

Strengthen process-hazard identification and risk-analysis capabilities.

For Managers

Improve decision-making around process risks, safeguards, and corrective actions.

For Organisations

Support proactive hazard identification, improve process safety decision-making, and strengthen prevention of major process incidents.

⭐ Why HAZOP Matters

Process incidents rarely happen simply because one thing went wrong. They can develop through a combination of equipment failures, process deviations, human factors, control failures, and inadequate safeguards.

HAZOP provides a structured and systematic way to challenge the design and ask what could go wrong before an incident occurs.

Ask What If. Find the Deviation. Understand the Consequence. Strengthen the Safeguard.

🔍 HAZOP – Hazard & Operability Study

Question the Process. Discover the Risk. Strengthen the Protection.

Develop the practical knowledge required to participate effectively in HAZOP studies and systematically identify process deviations, causes, consequences, safeguards, and opportunities for risk reduction.