Piping Pre-commissioning Checklist

• Project Name

• Location
  Address

• Project Manager

• Conducted on

  Date

FLOODING SPREAD SET-UP

• Conduct JSA

  ✔️

  ❌

  N/A

• Obtain Work Permits

  ✔️

  ❌

  N/A

• Check Flooding Procedure on hand

  ✔️

  ❌

  N/A

• Assemble equipment to drawing

  ✔️

  ❌

  N/A

• Check communications with dive team

  ✔️

  ❌

  N/A

• Check fuel, oil and water in flooding pump skids and diesel generators

  ✔️

  ❌

  N/A

• Check adequate chemicals and chemical injection spread operational and ready.

  ✔️

  ❌

  N/A

• Check flooding spread valve positions

  ✔️

  ❌

  N/A

• Secure flooding hoses and connections

  ✔️

  ❌

  N/A

• Lower hoses down to the launcher head and confirm connected

  ✔️

  ❌

  N/A

• Confirm position of launcher head valves

  ✔️

  ❌

  N/A

• Function test submersible lift pumps and diesel flooding pumps

  ✔️

  ❌

  N/A

• Check pressure chart recorder is wound up and signed, dated flooding chart inserted

  ✔️

  ❌

  N/A

• Prepare flooding, chemical injection and pipeline pigging logs

  ✔️

  ❌

  N/A

• Confirm the pipeline pig configuration in the launcher head

  ✔️

  ❌

  N/A

• Advise Client approved representative ready to start flooding operations

  ✔️

  ❌

  N/A

PIPELINE PIG VALVE LAUNCHING SEQUENCE

• Diesel engines on generator and pump skids started

  ✔️

  ❌

  N/A

• Confirm flooding hose connected and secured to launcher head and topside

  ✔️

  ❌

  N/A

• Engage submersible and flooding pumps

  ✔️

  ❌

  N/A

• Pig Launcher Valves No. 2, No.3 confirmed shut by dive team

  ✔️

  ❌

  N/A

• Pig Launcher Valve No. 1 main supply Ball Valve confirmed open by dive team

  ✔️

  ❌

  N/A

• Inject seawater approximately equivalent to 200m of linear pipe volume for flushing into the pipeline through valves 1

  ✔️

  ❌

  N/A

• Dive team open valve 2, then close valve

  ✔️

  ❌

  N/A

• 8 Inject seawater approximately equivalent to 200m of linear pipe volume for flushing into the pipeline and launch pig 1

  ✔️

  ❌

  N/A

• Dive team open valve 3, then close valve 2

  ✔️

  ❌

  N/A

• Inject seawater approximately equivalent to 200m of linear pipe volume for flushing into the pipeline and launch pig 2

  ✔️

  ❌

  N/A

• Chemically treated water will be pumped into the pipeline behind pig 2

  ✔️

  ❌

  N/A

• After 5 mins, open launcher valves 1, 2, and 3 pump pigs to the receiver

  ✔️

  ❌

  N/A

PIPELINE FLOODING, PIGGING, GAUGING AND CHEMICAL INJECTION

• Check pipeline pigs’ home via volumetric calculation

  ✔️

  ❌

  N/A

• Confirm pipeline flooded by pressure spike on pressure chart recorder chart or by pig indicator or by pumping 1.5x total pipeline volume

  ✔️

  ❌

  N/A

• Disengage flooding pumps and turn off submersibles

  ✔️

  ❌

  N/A

• Allow diesel engines 5-minute no load condition and shut off flooding pump skid

  ✔️

  ❌

  N/A

• Switch off submersible pumps and diesel generator

  ✔️

  ❌

  N/A

• Check flooding, chemical injection, pipeline pigging logs and ITPs signed by Client Rep

  ✔️

  ❌

  N/A

• Flooding Pressure chart recorder signed by Client Rep

  ✔️

  ❌

  N/A

• Confirmed flooding hoses depressurized to atmosphere pressure and disconnect prior to disconnection by dive team

  ✔️

  ❌

  N/A

• Dive team confirm flooding hose depressurized prior to disconnection

  ✔️

  ❌

  N/A

COMPLETION

• Additional Comments

• Inspected by:

  Sign

• Approved by:

  Sign