On 4 March 2020, the Transportation Safety Board (TSB) released its investigation findings on the Shelley natural gas pipeline incident, which occurred on 9 October 2018 approximately 13.5 km north of Prince George, British Columbia, Canada.
“We know this incident has caused concerns and disrupted the lives of many people in the area. For that, we apologise,” said Michele Harradence, Senior Vice President and Chief Operations Officer, Gas Transmission and Midstream for Enbridge. “We commit that we have learned from this incident and have taken steps to ensure the safety of our natural gas system.”
Since the Shelley incident, Enbridge has completed a comprehensive pipeline integrity programme on its natural gas pipeline system in BC to prevent similar incidents from occurring and to significantly improve pipeline safety. This is the most aggressive integrity programme ever undertaken by Enbridge on its pipeline system in BC. It is part of a new approach to pipeline safety and an ongoing commitment to continually improve the safety of our natural gas pipeline system.
Enhanced pipeline inspections
- The entire T-South natural gas pipeline system has been inspected with the latest generation inline pipeline inspection tool. This tool has double the number of sensors than previous inspection tools and is significantly more accurate at assessing potential problems like stress corrosion cracking.
- The T-South mainline system now is 100% inspected by this tool.
- Enbridge plans to continue to use this inspection tool going forward, conducting inspections with it more frequently.
Enhanced maintenance screening criteria
- In conjunction with these pipeline inspections, Enbridge has implemented more comprehensive criteria to evaluate pipeline inspection data. This will identify potential risks earlier that may require monitoring and proactive maintenance work.
Increased integrity digs
- As a result of this enhanced screening criteria, Enbridge has increased the number of integrity dig inspections undertaken in a normal maintenance year. During an integrity dig, Enbridge excavate a section of pipe to examine it further, validating its safety and undertaking proactive maintenance work if it is required. In 2019, the company more than doubled the number of digs undertaken to validate the safety of its pipeline system compared to previous years.
At Enbridge, no incident is acceptable, ever. If an incident were to occur, the company will implement changes to ensure the ongoing safety of its pipeline system.
Since the Shelley incident, Enbridge has completed a comprehensive integrity programme on its T-South natural gas pipeline system and implemented a new approach to pipeline safety that goes well beyond the industry standard.
Enbridge is reviewing the TSB report carefully and is committed to making further changes as needed to continually improve pipeline safety.
Read the article online at: https://www.worldpipelines.com/equipment-and-safety/05032020/enbridge-responds-to-tsb-natural-gas-pipeline-incident-report/