Job Safety Analysis
Sheet ,Job Description: Cold
cutting , Sequence Of Basic Job
Steps:
Pre -
work, work, wind up Work &
Housekeeping, Precautions: Plan
the work involving personnel responsible for preparation (isolation, depressurization, draining,
flushing, purging etc.) of the pipeline from which pig
is to retrieved. Review Scope of Work & step by step
procedure. Obtain the required work permit Conduct Tool Box Talk. Identify the
valve to be closed referring P & ID. Ensure the valves are closed fully. Use Lock & Tag Depressurize the pig
barrel to safe location. Drain the liquid content to trap / sump /
safe location. Confirm the absence of pressure by
opening a vent to safe location as well as observe pressure gauges reading. Flush the pig barrel with water for
possible presence of Phosphoric deposit. Asses the risk & Override gas
detectors in case required. Carry out gas test for safe working area.
Confirm isolation valve integrity by slight opening the nearest vent / drain
point. Confirm the absence of pressure at least
from 2 independent sources (e.g. pressure gauges fixed at different location of
pig barrel). Use non sparking tools in hazardous
location. Keep Fire Extinguishers & fire hose
in ready condition. Purge with
nitrogen (if required) to remove toxic content. Use air line unit if required. Use
safety goggles & Face Shield. Loosen the bolts / studs slowly. Do not stand in front of pig barrel door
while opening it.Ensure the
closure of pig barrel door after retrieving the pig. Ensure the closure of all vents &
drain valves after closing the pig barrel door.Ensure the normalization of all valves including vent, drain, pressure gauges, gas detectors, liquid trap etc. Ensure proper housekeeping of the area.
