HAZOP – Guide Words

FLOW HIGH LOW ZERO REVERSE

HAZOP – Guide Words

LEVEL HIGH LOW EMPTY

PRESSURE HIGH LOW VACUUM

HAZOP – Guide Words

TEMPERATURE HIGH LOW

HAZOP – Guide Words

VISCOSITY HIGH LOW

HAZOP – Guide Words

IMPURITIES MORE LESS UNEXPECTED

HAZOP – Guide Words

UV RADIATION HIGH LOW WRONG PLACE

HAZOP – Guide Words

CHANGE IN COMPOSITION

MORE OF LESS OF

HAZOP – Guide Words

CHANGE IN CONCENTRATION

MORE OF LESS OF

HAZOP – Guide Words

2 PHASE FLOW INTENDED UNINTENDED

HAZOP – Guide Words

REACTIONS MORE OF LESS OF UNINTENDED

HAZOP – Guide Words

NOISE TOO MUCH TONAL

HAZOP – Guide Words

ODOUR TOO MUCH FUGITIVE RELEASE HEDONISTIC TONE

HAZOP – Guide Words

REDUNDANCY NOT ENOUGH WRONG TYPE

HAZOP – Guide Words

OPERATION & MAINTENANCE

INSUFFICIENT MAINTENANCE ACCESS FOR MAINTENANCE

HAZOP – Guide Words

ELECTRICAL ISSUES RISKS

HAZOP – Guide Words

INSTRUMENTATION INSUFFICIENT WRONG TYPE

HAZOP – Guide Words

FIRE / EXPLOSION

RISKS ZONING REQUIREMENTS PREVENTATIVE PROCEDURES

HAZOP – Guide Words

SAFETY EQUIPMENT

INSUFFICIENT WRONG TYPE

HAZOP – Guide Words

UTILITY SERVICES REQUIRED

SECURITY OF SERVICE LOSS OF SERVICE

HAZOP – Guide Words

MATERIALS OF CONSTRUCTION

INCORRECT MATERIALS MATERIALS FAILURE

HAZOP – Guide Words

TESTING ISSUES

HAZOP – Guide Words

COMMISSIONING SPECIFIC ISSUES COMMISSIONING PROCEDURES DIFFERENT

TO NORMAL OPERATION RISKS

HAZOP – Guide Words

START UP SPECIFIC ISSUES START UP PROCEDURES DIFFERENT TO

NORMAL OPERATION RISKS

HAZOP – Guide Words

SHUT DOWN SPECIFIC ISSUES SHUT DOWN PROCEDURES DIFFERENT

TO NORMAL OPERATION RISKS

HAZOP – Guide Words

BREAKDOWN

SPECIFIC ISSUES SPARES HOLDING RISKS

HAZOP – Guide Words

EFFLUENT MORE OF LESS OF CONCENTRATION ISSUES

(Compatible materials for discharge) TEMPERATURE

HAZOP – Guide Words

SECURITY

PUBLIC ACCESS PUBLIC SAFETY EQUIPMENT SECURITY SITE SECURITY

HAZOP – Guide Words