To Hand Over a Pump to Maintenance, Follow These Steps:
Muhammad Adnan Sajid
Senior Production Operator |Control Room |Field Operator | Refinery CDU NHT Oil Movement | Oil & Gas | Co2 Removal Membranes | Amine | Dehydration TEG & MEG | LPG | LNG| Utilities | P&ID |Safety Commissioning | Wellheads
A) Start by isolating the pump as per the lock-out and tag-out procedure. This requires closing the suction, discharge, recycle, casing drain, and vent line isolation valves and attaching "DO NOT OPERATE" isolation tags to all isolation valves. Electrical isolation is also necessary, including disconnecting from local push buttons and breakers in the substation. An electrician should lock the motor breaker to prevent accidental energization, and "DO NOT OPERATE" tags should be attached to the local push button and breaker lock.
B) Drain the pump completely. If it is a chemical pump, flush it with water until the water runs clear. For hydrocarbon pumps, purge with N2 and bring the LEL down to 0% before handing over to maintenance for blinding.
C) Blind the suction, discharge, and recycle lines. If the pump casing drain is connected to a closed drain system, blind the drain line. If the pump casing vent line is connected to the flare system, blind the vent line. Attach "DO NOT OPERATE" isolation tags to all blinds as per the tag-out procedure.
D) Once blinding is complete, the pump is ready to be handed over to maintenance for repair work such as mechanical seal replacement, impeller repair, bearing replacement, or removal of the pump to the workshop.
E) If cleaning the pump suction strainer is necessary, isolation, draining, and purging are sufficient. Blinds are not required for this task.