CONTENTS
- PREFACE.................................................................................................................................... 3
1.1 Scope........................................................................................................................................ 3
1.2 Objectives................................................................................................................................ 3
1.3 Definitions................................................................................................................................ 3
- ACTIVITY METHODOLOGY..................................................................................................... 3
2.1 Introduction............................................................................................................................ 3
2.2 Responsibilities....................................................................................................................... 3
2.3 Timing and Scope of Study..................................................................................................... 5
2.4 Chair......................................................................................................................................... 5
2.5 HAZOP Team............................................................................................................................. 5
2.6 Facilities and Agenda.............................................................................................................. 6
2.7 Study Documents.................................................................................................................... 6
2.8 HAZOP Structure................................................................................................................... 6
2.9 Conduct HAZOP...................................................................................................................... 7
2.10 Guidewords.......................................................................................................................... 7
2.11 Reporting............................................................................................................................. 8
2.12 Handling of Action Items.................................................................................................... 9
2.13 Post HAZOP Design Changes............................................................................................ 9
2.14 Final Review Meeting........................................................................................................ 10
3.0 RELATED DOCUMENTS........................................................................................................ 11
3.1 Associated Proformas......................................................................................................... 11
3.2 Abbreviations......................................................................................................................... 11
. PREFACE
1.1 Scope
This Technical Guide provides guidance on how to carry out Hazard and Operability (HAZOP) studies. HAZOP studies should be carried out during the FEED and detailed design stages of a new development and also on modifications to existing plant.
1.2 Objectives
The objective of a HAZOP study is to systematically review the process in order to identify the potential hazards and operability problems, review the adequacy of the protective measures and either propose solutions or identify areas for further study. It is carried out by a team of experienced engineers chaired by a person who is experienced in the HAZOP technique.
Definitions
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Term
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Definition
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Hazard and Operability Study (HAZOP)
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A hazard identification study in which a team uses guide words to identify hazardous deviations from the design intent. The adequacy of the associated risk control measures is reviewed and recommendations for action or further study are made.
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2. ACTIVITY METHODOLOGY
2.1 Introduction
The need for HAZOP studies shall be considered at the start of the project in the preparation of the Design EHS Plan.
2.2 Responsibilities
The Project Lead Engineer is responsibility for ensuring that HAZOP’s are carried out to an adequate standard.. The following table identifies the main roles to be filled and advises on suitable people to carry out these roles.
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Task
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Duties
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Guidance in section
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Suitable person
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Responsible person
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Agree timing and scope of studies with Project Manager and Lead Engineers as appropriate
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2.3
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Lead EHS Engineer
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Select Chairman
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2.4
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Select team
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2.5
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HAZOP Secretary
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Arrange room and facilities
Issue agenda and invites
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2.6
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Process Engineer
EHS Engineer
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Obtain study documents
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2.7
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Take minutes and prepare draft report
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2.11
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Chair
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Plan HAZOP structure by breaking plant down into sections
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2.8
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A person who is trained and/or experienced in leading HAZOP studies.
Preferably independent – i.e. not employed on the project.
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Chair HAZOP meeting - Apply relevant guidewords and deviations, guide team
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2.9 2.10
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Check draft report prepared by HAZOP Secretary and issue
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2.11
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Team member
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Actively participate in HAZOP meeting
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2.10
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Experienced design engineers of appropriate disciplines for the subject of the HAZOP. Preferably Lead Engineers.
Experienced operations personnel.
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Action co-ordinator
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Record all action items raised by HAZOP, distribute to the appropriate personnel, chase as necessary to ensure proper close-out, and maintain proper records.
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2.12
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EHS Engineer
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Depending on the size of the project, some of the above roles may be combined. | 