High Temperature (HT) Steam Line Repair


The repair had the following specifications:

Structure Steam line
Design Pressure 970kpa
Class Approval ABS
Design Temperature 183 °C
Application Temperature 50 °C
Design Life 2 years
Surface Preparation Sa2.5
Wrap Length 1,000mm
Pipe Diameter 200mm NB
Geometory Elbow
Defect Type Circumferential
Corrosion type Cracking
Defect Details Circumferential through wall
Post Cure Yes - heat tapes



A weld crack was found in a pump room steam line on an FPSO. This line required an in service repair without the use of hot work, met the design temperature of 183ºC, and a defect modelled as a circumferential loss of 5mm was required to meet ABS class approval.


  • Technowrap™ 2K HT system with temperature capability up to 220°C
  • Heat tapes used to provided post cure temperature of 60°C - 80°C
  • Crack modelled as complete section loss over weld section
  • Spongejet™ surface preparation used for surface preparation


  • Spongejet™ fully recyclable system reduced equipment and materials footprint led to improve freight costs
  • Start-up design was used to bring line back on line two days quicker
  • ABS approved repair
  •  Technowrap™ provided both structural loads and pressure containing requirements

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