Fiber optic cables deployed alongside oil and gas pipelines serve dual purposes: telecommunications and distributed sensing (DAS/DTS) for leak detection, intrusion monitoring, and pipeline integrity assessment. The cable requirements are more stringent than standard telecom fiber.
Pipeline Monitoring Cable Requirements
- Hydrogen resistance: Buried pipelines can generate hydrogen from cathodic protection systems and soil chemistry. Standard fiber absorbs hydrogen, raising attenuation. Specify hydrogen-resistant fiber (ITU-T G.652D with low hydrogen aging).
- Armored construction: Direct-buried alongside pipelines requires steel wire armor (SWA) for crush and impact protection from construction equipment.
- DAS/DTS compatibility: Single-mode fiber for DAS sensing over 50+ km. The fiber must have uniform backscatter characteristics — not all G.652D fiber is suitable.
Related Reading: Armored cable guide · Underground cable · Fiber standards
Key Takeaways
- Specify hydrogen-resistant fiber for pipeline monitoring.
- Steel wire armor (SWA) is standard for direct-buried pipeline applications.
- Verify DAS/DTS compatibility — uniform backscatter is critical for sensing accuracy.
Need Project Support?
Our team is ready to help with your fiber optic cable requirements.