ThermoWrap™ MT Restores LNG Plant to Safety

QATAR

Pipe Details


  • An 813-mm (32-inch) diameter line carrying high-BTEX fluid experience internal corrosion
  • 7.5 m (24.6 feet) of the pipe needed to be repaired
  • Design Temperature: 156°C (313°F)
  • Operating Temperature: 134°C (273°F)
  • Installation Temperature: 134°C (273°F)
  • Design Pressure: 6.5 bar (94.27 psi)

Summary


  • An 813-mm (32-inch) diameter line carrying high-BTEX fluid experience internal corrosion
  • ThermoWrap™ MT restored integrity to 7.5 m (24.6 feet) of damaged line
  • Trained and qualified technicians repaired the damage
  • No disruption to operations
  • No environmental impact

An LNG plant in Qatar experienced internal corrosion on a line carrying hydrocarbons with a high concentration of benzene, toluene, ethylbenzene, and xylene (BTEX). In total, a length of 7.5 m (24.6 feet) on an elevated 813-mm (32-inch) diameter line required repairs.

The asset owner had used CSNRI solutions for several repairs over the course of four years and wanted to address this specific damage using a suitable and compatible composite system that could address the BTEX properties. Previous experience with other products had not been successful because of poor chemical compatibility. The owner knew that CSNRI could provide a repair with good resistance to high BTEX concentration.

CSNRI experts assessed the damage and prescribed ThermoWrap™ MT to restore line safety. ThermoWrap MT is a custom engineered repair system that uses a fiberglass, composite-reinforced coating to repair corroded or damaged piping with harsh chemical services and elevated temperatures. It is commonly used on chemical processing lines, flare lines, blowdown lines, and steam piping and because of its flexible properties, is easily applied to girth welds, elbows, tees and other complex geometries.

ThermoWrap MT is a custom engineered repair system that uses a fiberglass, composite-reinforced coating to deliver high strength characteristics.
ThermoWrap MT is a custom engineered repair system that uses a fiberglass, composite-reinforced coating to deliver high strength characteristics.
ThermoWrap MT was applied to an elevated 813-mm (32-inch) diameter line.
ThermoWrap MT was applied to an elevated 813-mm (32-inch) diameter line.

With the proper repair designed, a team of trained and qualified technicians from a local contractor arrived on site and began preparing the pipe surface for the composite system installation. The installers grit blasted the pipe to a finish equivalent to SA2.5, removing rust, coating, and mill scale to produce a near-white surface prior to the application of the repair. Once the pipe surface was ready, they applied 21 layers of ThermoWrap™ MT to 7.5 m (24.6 feet) of damaged line.

The entire line was restored without interrupting operations, which allowed the LNG train to continue operating while the repair was being made.