Contour & Snap Wrap Offshore Riser Repair

Contour & Snap Wrap Offshore Riser Repair

Malaysia

Pipe Details:

12” diameter with back to back bends
40 bar operating pressure
35°C operating temperature


Defect Details:

External corrosion with severe pitting up to 60% wall loss.


Repair Application:

The riser is cleaned via grit blasting to achieve S.A 2.5. The defects are identified and marked. The defects, which is concentrated at the bends is first repaired with Snap Wrap. These Snap Wraps are in 3” wide strip and are installed ala lobster back for a combined length of 1.8 meters.  Clock Spring Contour is then used to overwrap the whole length of 5 meters. The repair is designed to last for 20 years.


Repair Time:

1.5 days on-site for the complete application with the line remaining in service.

Riser with localised pitting

Installation of Snap Wrap & Contour

Riser repair: Before and after Contour installation

Riser repair: Before and after Contour installation

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