Repair of a Corroded Buried Pipeline

Introduction

A 100-meter section of an oil pipeline faced severe corrosion due to failures in the external coating. The corrosion compromised the structural integrity of the pipeline, presenting risks of leakage and further damage. To restore the pipeline’s durability and prevent future issues, the affected section was permanently reinforced using HJ3's CarbonSeal™ HT1 carbon fiber composite.

Pipeline Specifications

• Length: 100-meter repair length
• Diameter: 20 inches
• Issue: Severe corrosion due to external coating failure in the buried section

Corrosion Problem

The external protective coating of the buried section of the pipeline had deteriorated, allowing corrosion to attack the steel. The corrosion weakened sections of the pipeline, threatening its functionality and safety. Left untreated, the corrosion could have led to significant environmental hazards and operational downtime.

Permanent Repair Solution

To provide a permanent, ASME PCC-2 compliant repair, HJ3's CarbonSeal™ HT1 carbon fiber composite was utilized. Known for its high strength and corrosion resistance, this composite material was applied to both the defect areas and the surrounding sections of the pipeline.

Application Process:

• 4 layers of carbon fiber composite were applied to the corroded areas with defects to provide maximum reinforcement and structural integrity.
• 2 layers of carbon fiber composite were applied to the rest of the section to provide protection against further corrosion.

This ASME PCC-2 compliant composite repair created a permanent repair solution while protecting against future external corrosion. The composite’s strong and impermeable barrier permanently sealed the affected pipeline against future damage from external corrosion.

‍Outcome

The application of HJ3's CarbonSeal™ HT1 delivered a permanent repair to the pipeline by:

• Reinforcing the weakened defect areas and restoring the pipeline’s structural integrity.
• Sealing and protecting the entire 100-meter section from future corrosion and potential failure.
• Eliminating the need for future repairs in this section, ensuring long-term operational safety and efficiency.

Conclusion

The use of HJ3's CarbonSeal™ HT1 carbon fiber composite provided a permanent solution to the corrosion problem in this 100-meter section of buried oil pipeline. By reinforcing the defective areas and sealing the entire section, the repair not only addressed the current issues but also offered a preventive measure against future corrosion. This case highlights the effectiveness of advanced carbon fiber composite materials in extending the life of pipelines and ensuring their safe and reliable operation for years to come.