Project

K129 Gathering Pipelines

222km

Pipelines

$102m

Project Value

Zero

LTI’s

DN630

Pipe Diamater

Mitchell met all the requird criteria on this milestone project, significantly through the use of our innovative systems. Mitchell specifically developed over trench welding barges for this project that allowed the direct installation of the pipe and tees. All were butt welded on the weld barge and laid direct to the trench, removing the need to use large electrofusion couplings, improving safety, quality and productivity.

Project Details

  • 222km PE100 up to DN630
  • Nil use of Electrofusion Couplings >DN250
  • Single High Pressure Butt Fusion Fast Cool Welding
  • 100% Time of Flight Diffraction NDT testing
  • 100% Pneumatic strength and leak testing
  • 100% GPS weld location and traceability
  • 100% traceability of all materials
  • 100% Welding qualification
  • Native soil screened for bed and pad
  • Marker tape and added tracer wire above the pipe
  • Pull through cleaning of each pipe at welding
  • Pneumatic flushing for pipe cleanliness verification
  • Machine control graded trenching including engineering survey and design by Mitchell
  • Full installation of facilities and tie-ins

LOCATION

Roma, Queensland

PROJECT VALUE

102m

YEAR

2014

CLIENT

Santos Ltd

Related Projects

Santos Limited

Roma West 2B Gathering Project

This particular section included gas and water gathering pipelines, along with the added complexity of installation of HV & FOC reticulation, often commingled within the trenches with the PE Gas & Water pipelines.

Pneumatic testing was progressively completed in five defined sections, allowing a sequenced handover of the asset to commence early gas extraction.

Completed on time and on budget, with zero defects, despite significant challenges of slow rock excavation and inclement weather.

Santos Ltd

K129 Gathering Pipelines