HAZOP: Guide to Best Practice

Chapter 1. Introduction

• 1.1 Aims and Objectives
• 1.2 Essential Features of HAZOP Study

Chapter 2. Process Hazard Studies

• 2.1 HS 1—Concept Stage Hazard Review
• 2.2 HS 2—HAZID at Front-End Engineering Design (FEED) or Project Definition Stage
• 2.3 HS 3—Detailed Design Hazard Study
• 2.4 HS 4—Construction/Design Verification
• 2.5 HS 5—Pre-Commissioning Safety Review
• 2.6 HS 6—Project Close-Out/Post Start-Up Review
• 2.7 HS 0—Consideration of Inherently Safer or Less Polluting Systems
• 2.8 HS 7—Demolition/Abandonment Reviews
• 2.9 Overview of Hazard Studies
• 2.10 Illustrative Checklist for HS 2

Chapter 3. The HAZOP Study Method

• 3.1 Essential Features
• 3.2 The Purpose
• 3.3 Limitations

Chapter 4. The Detailed HAZOP Study Procedure

• 4.1 The Description and Design Intention
• 4.2 Generating a Deviation
• 4.3 Identifying Causes
• 4.4 Evaluating Consequences
• 4.5 Safeguards (Protection)
• 4.6 Risk Assessment
• 4.7 Recommendations/Actions
• 4.8 Recording
• 4.9 Continuing and Completing the Analysis
• 4.10 An Illustration of the HAZOP Study Process

Chapter 5. Organizing a HAZOP Study

• 5.1 Defining the Scope and Objectives of the Study and Establishing the Boundaries
• 5.2 Appointing a Team Leader and Selecting the Team
• 5.3 Preparation

Chapter 6. Carrying Out a Study

• 6.1 Premeeting with Client
• 6.2 Planning the Meetings
• 6.3 The Study Meetings
• 6.4 Coordinating and Reviewing Responses
• 6.5 Completing and Signing Off the Report(s)
• 6.6 Follow-Up of Actions and Management of Change

Chapter 7. Recording and Auditing

• 7.1 Background Information
• 7.2 Section Headings
• 7.3 The Recording Format for the Detailed Examination
• 7.4 The Level of Recording
• 7.5 The Content
• 7.6 Computer Recording
• 7.7 Auditing a HAZOP Study

Chapter 8. Training

• 8.1 Team Members
• 8.2 Scribe
• 8.3 Team Leader

Chapter 9. Company Procedures for HAZOP Study

Chapter 10. Advanced Aspects of HAZOP Study

• 10.1 HAZOP Study of Computer-Controlled Processes
• 10.2 Human Factors
• 10.3 Linking HAZOP Studies to LOPA

Chapter 11. Specific Applications of HAZOP

• 11.1 Modification of Existing Operations
• 11.2 Repeat Designs—HAZOP-by-difference
• 11.3 Periodic Hazard Studies and the HAZOP of an Existing Plant
• 11.4 Operating Procedures
• 11.5 Pilot Plant and Laboratory Operations
• 11.6 Drains, Vents, and Other Interconnections Between Plants
• 11.7 Commissioning and Decommissioning
• 11.8 Start-Up and Shutdown
• 11.9 Construction and Demolition
• 11.10 Contract Operations

Chapter 12. Factors for a Successful HAZOP Study

• 12.1 Throughout the Study
• 12.2 Before the Study
• 12.3 During the Study
• 12.4 After the Study

Appendix 1. The Guideword-First Approach to HAZOP

Appendix 2. The Use of Checklists Within HAZOP Study

Appendix 3. An Illustration of HAZOP Study for a Continuous Operation

• A3.1 Methanol Injection
• A3.2 General Process Data
• A3.3 The Issues
• A3.4 Methodology

Appendix 4. An Illustration of HAZOP Study for a Batch Operation

• A4.1 Introduction
• A4.2 The Company, Site, Plant, and Process
• A4.3 The Process Stages Selected for HAZOP Study
• A4.4 HAZOP Study of Steps 9 and 10, the Reaction Stage and Workout
• A4.5 A Section of the HAZOP Study Report for the Batch Reaction (See Table A4.1)

Appendix 5. An Illustration of HAZOP Study for a Procedure

• A5.1 Background
• A5.2 Detailed Proposed Sequence
• A5.3 The HAZOP Study
• A5.4 Final HAZOP Study Report
• A5.5 Authors Notes on this Procedure

Acronyms and Abbreviations

References and Bibliography

• Bibliography