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Piping Pre-commissioning Checklist

FLOODING SPREAD SET-UP

Conduct JSA

Obtain Work Permits

Check Flooding Procedure on hand

Assemble equipment to drawing

Check communications with dive team

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

Check adequate chemicals and chemical injection spread operational and ready.

Check flooding spread valve positions

Secure flooding hoses and connections

Lower hoses down to the launcher head and confirm connected

Confirm position of launcher head valves

Function test submersible lift pumps and diesel flooding pumps

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

Prepare flooding, chemical injection and pipeline pigging logs

Confirm the pipeline pig configuration in the launcher head

Advise Client approved representative ready to start flooding operations

PIPELINE PIG VALVE LAUNCHING SEQUENCE

Diesel engines on generator and pump skids started

Confirm flooding hose connected and secured to launcher head and topside

Engage submersible and flooding pumps

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

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

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

Dive team open valve 2, then close valve

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

Dive team open valve 3, then close valve 2

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

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

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

PIPELINE FLOODING, PIGGING, GAUGING AND CHEMICAL INJECTION

Check pipeline pigs’ home via volumetric calculation

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

Disengage flooding pumps and turn off submersibles

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

Switch off submersible pumps and diesel generator

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

Flooding Pressure chart recorder signed by Client Rep

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

Dive team confirm flooding hose depressurized prior to disconnection

COMPLETION

Additional Comments

Inspected by:
Approved by:

Piping Pre-commissioning Checklist

Created by: SafetyCulture Staff | Industry: General | Downloads: 13

This piping pre-commissioning checklist can be used by pipeline engineers to perform flooding spread set-up (dry commissioning), pipeline pig valve launching sequence (wet commissioning), and pipeline flooding, pigging, gauging, and chemical injection (commissioning).

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Piping Pre-commissioning Checklist

FLOODING SPREAD SET-UP

Conduct JSA

Obtain Work Permits

Check Flooding Procedure on hand

Assemble equipment to drawing

Check communications with dive team

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

Check adequate chemicals and chemical injection spread operational and ready.

Check flooding spread valve positions

Secure flooding hoses and connections

Lower hoses down to the launcher head and confirm connected

Confirm position of launcher head valves

Function test submersible lift pumps and diesel flooding pumps

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

Prepare flooding, chemical injection and pipeline pigging logs

Confirm the pipeline pig configuration in the launcher head

Advise Client approved representative ready to start flooding operations

PIPELINE PIG VALVE LAUNCHING SEQUENCE

Diesel engines on generator and pump skids started

Confirm flooding hose connected and secured to launcher head and topside

Engage submersible and flooding pumps

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

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

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

Dive team open valve 2, then close valve

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

Dive team open valve 3, then close valve 2

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

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

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

PIPELINE FLOODING, PIGGING, GAUGING AND CHEMICAL INJECTION

Check pipeline pigs’ home via volumetric calculation

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

Disengage flooding pumps and turn off submersibles

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

Switch off submersible pumps and diesel generator

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

Flooding Pressure chart recorder signed by Client Rep

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

Dive team confirm flooding hose depressurized prior to disconnection

COMPLETION

Additional Comments

Inspected by:
Approved by: