EN 61882:2016
(Main)Hazard and operability studies (HAZOP studies) - Application guide
General Information
- Abstract
IEC 61882:2016 is available as IEC 61882:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61882:2016 provides a guide for HAZOP studies of systems using guide words. It gives guidance on application of the technique and on the HAZOP study procedure, including definition, preparation, examination sessions and resulting documentation and follow-up. Documentation examples, as well as a broad set of examples encompassing various applications, illustrating HAZOP studies are also provided. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - clarification of terminology as well as alignment with terms and definitions within ISO 31000:2009 and ISO Guide 73:2009; - addition of an improved case study of a procedural HAZOP. Keywords: HAZOP, risks and operability problems
- Status
- Published
- Publication Date
- 02-Jun-2016
- Withdrawal Date
- 13-Apr-2019
- Technical Committee
- CLC/SR 56 - Dependability
- Drafting Committee
- IEC/TC 56 - IEC_TC_56
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 03-Jun-2016
- Completion Date
- 03-Jun-2016
Overview
EN 61882:2016 (IEC 61882:2016) - Hazard and operability studies (HAZOP studies) - Application guide - is a practical guidance standard published by CLC that explains how to plan and run HAZOPs. The edition is a technical revision of the 2001 version and is available as an RLV (redline) edition showing changes versus the previous edition. The standard describes the HAZOP technique based on guide words, and covers definition, preparation, examination sessions, documentation and follow-up. It also aligns terminology with ISO 31000:2009 and ISO Guide 73:2009 and adds an improved case study of a procedural HAZOP.
Key topics
- HAZOP fundamentals: purpose, principles of examination and limitations for identifying risks and operability problems.
- Guide words and deviations: use of guide words to systematically identify deviations from design intent and normal operation.
- Study procedure: initiating a study, defining scope and objectives, roles and responsibilities, planning and data collection.
- Examination methods: structuring and conducting examination sessions (property-first and guide-word-first sequences).
- Documentation & follow-up: recording methods (worksheets, marked-up representations, reports), sign-off and action tracking.
- Examples & case studies: annexed illustrative examples including introductory examples, procedural HAZOP, automatic train protection, emergency planning, piezo valve control and other practical applications.
- Terminology alignment: clarified terms consistent with ISO 31000 and ISO Guide 73 for risk management.
Applications
EN 61882 is designed for systematic identification of hazards and operability issues across life-cycle stages:
- Concept, design and development reviews
- Commissioning, operation and maintenance of process and control systems
- Procedural and human-factor analyses (procedural HAZOP)
- Emergency planning and safety-critical system assessments (examples include train ATP and control-system case studies) This makes it suitable for industries such as chemical and process plants, energy, transport, manufacturing and infrastructure where formal risk assessment and operability analysis are essential.
Who should use it
- Safety and process engineers
- Risk managers and HSE professionals
- Design and control-system engineers
- Operations and maintenance managers
- Regulators and auditors involved in process safety and risk assessment
Using EN 61882 improves consistency of HAZOP studies, helps uncover risks and operability problems early, and supports traceable follow-up of mitigation actions.
Related standards
- ISO 31000:2009 (Risk management)
- ISO Guide 73:2009 (Risk management - Vocabulary)
- Referenced IEC standards such as IEC 60812, IEC 61025, IEC 61160 and IEC 61511 series (as noted in the standard’s bibliography)
Keywords: HAZOP, hazard and operability studies, guide words, risk assessment, risks and operability problems, procedural HAZOP, process safety.
Relations
- Refers
IEC 60050-192:2015 - International Electrotechnical Vocabulary (IEV) - Part 192: Dependability - Effective Date
- 20-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
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Frequently Asked Questions
EN 61882:2016 is a standard published by CLC. Its full title is "Hazard and operability studies (HAZOP studies) - Application guide". This standard covers: IEC 61882:2016 is available as IEC 61882:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61882:2016 provides a guide for HAZOP studies of systems using guide words. It gives guidance on application of the technique and on the HAZOP study procedure, including definition, preparation, examination sessions and resulting documentation and follow-up. Documentation examples, as well as a broad set of examples encompassing various applications, illustrating HAZOP studies are also provided. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - clarification of terminology as well as alignment with terms and definitions within ISO 31000:2009 and ISO Guide 73:2009; - addition of an improved case study of a procedural HAZOP. Keywords: HAZOP, risks and operability problems
IEC 61882:2016 is available as IEC 61882:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61882:2016 provides a guide for HAZOP studies of systems using guide words. It gives guidance on application of the technique and on the HAZOP study procedure, including definition, preparation, examination sessions and resulting documentation and follow-up. Documentation examples, as well as a broad set of examples encompassing various applications, illustrating HAZOP studies are also provided. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - clarification of terminology as well as alignment with terms and definitions within ISO 31000:2009 and ISO Guide 73:2009; - addition of an improved case study of a procedural HAZOP. Keywords: HAZOP, risks and operability problems
EN 61882:2016 is classified under the following ICS (International Classification for Standards) categories: 03.100.50 - Production. Production management; 03.120.01 - Quality in general; 13.020.30 - Environmental impact assessment. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 61882:2016 has the following relationships with other standards: It is inter standard links to IEC 60050-192:2015, EN 13763-1:2025, EN IEC 62933-5-2:2020, EN IEC 62282-5-100:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 61882:2016 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.