JSA Ref. No. JSA / KOC / 34 Work Area / Equipment:
Permit No. Date:
PERSONAL PROTECTIVE EQUIPMENT: Hard Hat, Safety Shoes, Hand Gloves, Safety Harness, BA Set / Airline Unit, Safety Goggles, Multi – gas Detector, SEQUENCE OF BASIC JOB STEPS
POTENTIAL HAZARDS
Yes / No
PRECAUTIONS
Plan the work involving personnel responsible for preparation (such as isolation, depressurization, draining, venting, flushing) of the equipment / system to be purged.
Lack of Communication Non-compliance of KOC -HSEMS Procedures, F & S Regulations
Refer Chapter – 11 “Crude Oil Storage, Pipeline & Oil Spill” of KOC F & S Regions, and HSEMS Procedure Doc. No. SA.KOC.004 “Permit to Work”
Ensure the equipment / system to be purged is positively isolated from all sources of energy (hydraulic, pneumatic, electrical etc.)
Energized Equipment
Planning
Use multilock & tag for isolation carried out.
Ensure the equipment / system is depressurized & content is drained safely.
Pressurized Fluid
Arrange the adequate Nitrogen Cylinders / Unit considering the volume to be purged.
Nitrogen Cylinders / Unit
Ensure the deployment of Nitrogen unit inside the plant does not create any hazard for the facility.
Flammable & / or Toxic Atmosphere
Ensure the confined space is flushed, purged and thoroughly ventilated as required.
Unauthorized Work
Improper / Defective Tools
Rupture of Nitrogen Supply Hoses & Couplings
Obtain the required permits from the permit issuer.
Ensure the tools (such as N2 Unit, Pump, Hose, Coupling & Pressure Gauges etc) to be used are free from defect. Ensure the N2 supply hoses and couplings are rated for the required service and pressure.
Stay away from the pressurized N2 hose & coupling to avoid cold burn in case of leak.
Cold Burn
Purging
Calculate the amount of N2 required for the volume to be purged.
Excess or Less Nitrogen Supply
Windup & Housekeeping
Unsafe Disposal of Purged Fluid
Lack of Oxygen
Scattered Material
Barricade the area & post warning notice.
Keep a close watch on the N2 supply flow meter.
Ensure the disposal of purged volume to a safe location such as flare or vent. Do not enter a vessel / tank / pipeline which is purged with
N2.
Ensure proper wind up & housekeeping at worksite.
The accessories (tools, hoses, couplings) must be disconnected and stored properly.