- Refining Company
- 30” pipe
- Operating Pressure: 25 psig
- Design Pressure: 25 psig
- Flare gas (H2S, NH3, HC) pipeline
- Pipe Defect: Internal Pitting
This flare line was suffering from internal pitting due to the harsh chemistries in the line. The pitting was primarily at the 6 o’clock, but extended midway up the walls. Pit depths were up to 3mm, and continuing uninhibited. The plant was at risk of shutdown if the corrosion continued and developed into a through-wall defect. The length of the corroded area extended over 50 meters, and encompassed straight runs, tees, and elbows.
CSNRI team of engineers designed repairs for each defect according to ASME PCC-2 Article 4.1, and recommended a DiamondWrap® repair solution. Only 2 layers of DiamondWrap® HTA™ were required to repair the defect.
A team of trained and certified installers installed layers of carbon fiber over the specified repair area, according to the calculations prepared by the CSNRI engineer. No heavy equipment or hot work was required for the installation, and the line was in operation with no disruption in production.
The DiamondWrap® carbon fiber repair has enabled the refinery to safely maintain full production until their next turnaround. This saved the plant valuable run time, while ensuring the integrity of the flare line with a long-term design life.