CONTENTS
1 INTRODUCTION ................................................................................................. 3
1.1 General ................................................................................................................ 3
1.2 Document Structure ................................................................................................. 3
2 DEFINITIONS AND ABBREVIATIONS ..................................................................... 4
3 REFERENCE DOCUMENTS ...................................................................................... 5
4 SCOPE AND OBJECTIVES ...................................................................................... 6
5 HAZOP STUDY PROCEDURE ................................................................................... 7
5.1 General ................................................................................................................ 7
5.2 Scope of HAZOP Review with Risk Assessment ............................................... 7
5.3 HAZOP Study Methodology ............................................................................... 8
5.3.1 Nodes Definition and Intention ......................................................................... 10
5.3.2 Parameters ....................................................................................................... 10
5.3.3 Guide Words and Deviations ........................................................................... 10
5.3.4 Causes ............................................................................................................. 12
5.3.5 Consequences .................................................................................................... 12
5.3.6 Safeguards ........................................................................................................ 13
5.3.7 Risk Assessment and Recommendations .................................................... 13
5.4 HAZOP Sessions...............................................................................................14
5.5 HAZOP Team Composition ...............................................................................15
5.5.1 Role of HAZOP Chairman ..............................................................................15
5.5.2 Role of HAZOP Secretary..............................................................................16
6 HAZOP REPORTING ........................................................................................17
6.1 Recording of Minutes .........................................................................................17
6.1.1 Format of HAZOP Working Sheets ..................................................................17
6.2 HAZOP Report ....................................................................................................17
6.3 HAZOP Follow-up ................................................................................................18
6.3.1 Follow-up Activity ............................................................................................18
Appendix A RISK ASSESSMENT METHODOLOGY
Appendix B GUIDELINES
Appendix C TYPICAL HAZOP WORKSHEETS FORMAT
Appendix D TYPICAL HAZOP FOLLOW UP SHEETS FORMAT