Testing of replacement pipelines in Waterford and Ballybeg

Testing of replacement pipelines in Waterford and Ballybeg

Project outline 

PTS was contracted to carry out the swabbing, gauging, filling, hydrotesting, dewatering and drying works on a 330m x 18” diverson and 360m x 10” temporary bypass pipeline.

The brief was also to carry out testing of the entire pipeline section (2,216.5m) on completion of the final tie-ins.

Project delivery and innovation

The pipeline section needing swabbing and gauging to prove the section was clear of construction debris and to confirm no deformation had occurred.  The Murphy team then filled the section with water extracted from a hydrant.  Due to pipeline elevations, a backpressure was maintained throughout the filling process.  The section was then pressure tested to 28.5 barg for a period of 24 hours; once completed the water was then discharged into the local foul sewer network.  To complete the process, foam pigs were pushed through the pipeline with dry air to remove all free water, and finally the section was dried to minus 20C dew point using desiccant dry air.

All activities were carried out on time and within budget.

Key facts

  • Pipeline testing services delivered on 2,2165m pipeline

Client

Bord Gais Networks

Location

Waterford and Ballybeg

Completion Date

June 2013

Value

Capabilities Demonstrated

  • Pipeline testing services

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