1. HAZOP – Guide Words
FLOW
 HIGH
 LOW
 ZERO
 REVERSE

2. HAZOP – Guide Words
LEVEL
 HIGH
 LOW
 EMPTY

3. PRESSURE
 HIGH
 LOW
 VACUUM
HAZOP – Guide Words

4. TEMPERATURE
 HIGH
 LOW
HAZOP – Guide Words

5. VISCOSITY
 HIGH
 LOW
HAZOP – Guide Words

6. IMPURITIES
 MORE
 LESS
 UNEXPECTED
HAZOP – Guide Words

7. UV RADIATION
 HIGH
 LOW
 WRONG PLACE
HAZOP – Guide Words

8. CHANGE IN
COMPOSITION
 MORE OF
 LESS OF
HAZOP – Guide Words

9. CHANGE IN
CONCENTRATION
 MORE OF
 LESS OF
HAZOP – Guide Words

10. 2 PHASE FLOW
 INTENDED
 UNINTENDED
HAZOP – Guide Words

11. REACTIONS
 MORE OF
 LESS OF
 UNINTENDED
HAZOP – Guide Words

12. NOISE
 TOO MUCH
 TONAL
HAZOP – Guide Words

13. ODOUR
 TOO MUCH
 FUGITIVE RELEASE
 HEDONISTIC TONE
HAZOP – Guide Words

14. REDUNDANCY
 NOT ENOUGH
 WRONG TYPE
HAZOP – Guide Words

15. OPERATION &
MAINTENANCE
 INSUFFICIENT MAINTENANCE
 ACCESS FOR MAINTENANCE
HAZOP – Guide Words

16. ELECTRICAL
 ISSUES
 RISKS
HAZOP – Guide Words

17. INSTRUMENTATION
 INSUFFICIENT
 WRONG TYPE
HAZOP – Guide Words

18. FIRE /
EXPLOSION
 RISKS
 ZONING REQUIREMENTS
 PREVENTATIVE PROCEDURES
HAZOP – Guide Words

19. SAFETY
EQUIPMENT
 INSUFFICIENT
 WRONG TYPE
HAZOP – Guide Words

20. UTILITY
SERVICES
REQUIRED
 SECURITY OF SERVICE
 LOSS OF SERVICE
HAZOP – Guide Words

21. MATERIALS OF
CONSTRUCTION
 INCORRECT MATERIALS
 MATERIALS FAILURE
HAZOP – Guide Words

22. TESTING
 ISSUES
HAZOP – Guide Words

23. COMMISSIONING
 SPECIFIC ISSUES
 COMMISSIONING PROCEDURES DIFFERENT
TO NORMAL OPERATION
 RISKS
HAZOP – Guide Words

24. START UP
 SPECIFIC ISSUES
 START UP PROCEDURES DIFFERENT TO
NORMAL OPERATION
 RISKS
HAZOP – Guide Words

25. SHUT DOWN
 SPECIFIC ISSUES
 SHUT DOWN PROCEDURES DIFFERENT
TO NORMAL OPERATION
 RISKS
HAZOP – Guide Words

26. BREAKDOWN
 SPECIFIC ISSUES
 SPARES HOLDING
 RISKS
HAZOP – Guide Words

27. EFFLUENT
 MORE OF
 LESS OF
 CONCENTRATION ISSUES
(Compatible materials for discharge)
 TEMPERATURE
HAZOP – Guide Words

28. SECURITY
 PUBLIC ACCESS
 PUBLIC SAFETY
 EQUIPMENT SECURITY
 SITE SECURITY
HAZOP – Guide Words