Equipment
Pigging is an integral part of the maintenance regime for pipelines. SPEC offers pig trap systems ranging from simple standalone launchers and receivers to fully automated skid-mounted systems.
Wellsite Skids for Petronas at Garraf Iraq 2013
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Application
Pigging can support liquid management, deposit removal and internal-corrosion control, according to the pipeline operating philosophy. Water accumulates at low points in the pipeline and those points become corrosion hot spots.
Beyond corrosion prevention, a proper pigging regime keeps the process facility operating at its specified design parameters. Regular pigging clears blockages and so reduces pressure drop along the line. Periodic pigging can also affect the sizing of the slug catcher, and may reduce slugging requirements and support more efficient downstream design.
System configuration
System configuration varies with process duty, operating conditions and project requirements.
Enlarged section where pigs are loaded or retrieved.
End closure of the major barrel, for efficient loading and unloading of pigs.
Transition between the major and the minor barrel.
Section between the pig trap valve and the reducer.
Connects the major barrel with the bypass line, so fluid can be diverted through the barrel to launch or receive a pig.
Connects the pipeline with the related facilities.
Fills and pressurises the barrel on both sides of the pig at the same time, so a pig ready to launch neither moves forward nor loses its seal.
Connection points
Handling aids
The barrel runs from the pig trap valve up to and including the end closure. Barrel sizes, pressure rating and degree of automation are set against your pipeline and operating philosophy. Final equipment arrangement and delivery format depend on process duty, transport constraints and site requirements.
Range
Simple launcher and receiver units where the operation is manual.
Trap, valves, lines and instrumentation assembled on a common skid.
Automated sequencing of the launch and receive operation.
Gallery
Related
Process data
Enquiries
Send us your process data and operating conditions, and we will review the duty with you.
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