On-Rope Repairs To Live Service Water Lines


At an LNG facility in Western Australia, through-wall defects were discovered on service water lines. To avoid shutdown of the lines, a repair solution was required that could address the defects while
encompassing the existing temporary repairs.


The line had the following specifications:

Structure Service water lines
Surface Preparation ST3
Design Pressure 10.0 bar
Design Temperature 65ºC
Application Temperature 20ºC - 40ºC
Design Life 19 years
Repair Length 550mm
Pipe Diameter 114mm
Geometry Wrap over pipe and flanges
Damage Mechanism Internal corrosion, perforation
Defect Details 250mm axial, fully circumferential, through-wall

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  • Temporary repairs were not removed and were instead treated as defects, allowing for live line repairs without additional leak sealing requirements
  • 12 layers of Technowrap™ 2K glass fibre was applied, adhering to prepared surfaces adjacent to each defect and providing a 19-year design life
  • As scaffolding was deemed impractical, repairs were completed on ropes by ICR IAS JV Application Specialists


  • No shutdown required
  • No material removal required
  • Safety - No hot works

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