Document Y9M9YkqzV8No8Xq9G1z8w3oKO

Worksheet pany: DOW ce-^: SLURRY HDPE/CATALYST DECANT HAZOP-PC 1.00 Node: 1 Page: 1 Node: 1 DECANT(D-260A/B)/HOLD(D-202C) TANKS rameter: Flow Intention: 2000#/HR INTERMITENT DEWORD DEVIATION POSSIBLE CAUSES CONSEQUENCES RECOMMENDATIONS BY No Flow PLUGGED LINE INABILITY TO MAKE/ OPERATOR TRAINING RF CATALYST POOR SEPARATION PLANT SHUTDOWN PREPARE SYSTEM FOR LINE OPENING OVER FILL VESSEL IF OUTLET LINE PLUGS DAMAGE PUMP IF INLET/OUTLET PLUGGED INSTRUMENT MALFUNCTION OPERATIONS ERROR CONTAMINATION EVALUATE GC REDUNDANT LEVEL INDICATION D-202C 5 REDUNDANT LEVEL INDICATION ON D-260A/B * Y EVALUATE NEED FOR GC P-251 FLOW INDICATION 5 FLUSH LINES AFTER * USE A More Flow OPERATION ERROR OVERFILL VESSELS q, OPERATIONS TRAINING RF PROGRAMMING ERROR CATALYST LOSS INTO REVIEW MOD V D-202C 7 PROGRAM EC INSTRUMENTATION MALFUNCTION CATALYST IN VENT $ EVALUATE FAIL HEADER POSITION OF VALVES * DO A 120914 CONFIDENTIAL Worksheet Company: DOW Process: SLURRY HDPE/CATALYST DECANT HAZOP-PC 1.00 Node: 1 Page: 3 Node: 1 DECANT(D-260A/B)/HOLD(D-202C) TANKS Parameter: Temperature Intention: AMBIENT TEMPERATURE GUIDEWORD DEVIATION POSSIBLE CAUSES CONSEQUENCES RECOMMENDATIONS BY Mor Higher Temp D -235 WET SOLVENT OVER PRESSURE DRUM/ N2 PURGE PSV LINE FLOW FROM VENT HEADER TO DRUMS POOR QUALITY OPERATOR TRAINING RF CATALYST IN D-260 DEAD HEAD PUMPS P-251 CAVITATE 3 EVALUATE MINIMUM FLOW LINE FOR P-251 WITH SUFFICIENT INSTRUMENTATION TO ENSURE NO BACKFLOW FROM D-202A TO D-202C. GC FIRE ADEQUATE SPRINKLER COVERAGE GC OPERATOR ERROR $ ALARM AND BLOCK EC FEEDS ON D-260A/B AND D-202C ON HIGH TEMP. DO A 120915 CONFIDENTIAL Worksheet Company: DOW "ocess: SLURRY HDPE/CATALYST DECANT HAZOP-PC 1.00 Node: 1 Page: 4 Node: 1 DECANT(D-26OA/B)/HOLD(D-202C) TANKS Parameter: Pressure Intention: CONTROL PRESSURE AS REQ'D GUIDEWORD DEVIATION POSSIBLE CAUSES More Higher FIRE Pressure CONSEQUENCES PSV OPENS RECOMMENDATIONS / OPERATIONS TRAINING BY RF Less INSTRUMENT MALFUNCTION BACKFLOW/TRANSFER % SEE REVERSE FLOW * PROBLEMS THIS NODE OPERATIONS ERROR 'b ADD HIGH PRESSURE * ALARMS TO BOTH TANKS Lower PAD SYSTEM Pressure FAILURE SEE REVERSE FLOW f- SEE REVERSE FLOW * THIS NODE THIS MODE OPERATIONS ERROR Oo CONF 6 t^NTia, Worksheet Company: DOW T"-ocess: SLURRY HDPE/CATALYST DECANT HAZOP-PC 1.00 Node: 1 Page: 5 Node: 1 DECANT(D-260A/B)/HOLD(D-202C) TANKS Parameter: Level Intention: SUFFICIENT TO RUN PUMP GUIDEWORD DEVIATION POSSIBLE CAUSES Less Less Level INSTRUMENT FAILURE CONSEQUENCES RECOMMENDATIONS BY P-251 CAVITATION / REDUNDANT LOW EC LEVEL INDICATION/ ALARM WITH MOD V PUMP SHUTDOWN LOGIC. OPERATIONS ERROR 7s OPERATIONS TRAINING RF LEAK LOCATE GAS DETECTOR IN AREA PER TC RECOMMENDATIONS RF DO A 120917 CONFIDENTIAL