ARCHIVED - Safety and Environmental Compliance - 2014-03-05 - Nova Gas Transmission Ltd. - Order SG-N081-001-2014

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The National Energy Board (NEB or the Board) recently released its audit of TransCanada PipeLines Ltd.’s (TransCanada) integrity management program. In the audit, the Board noted potential safety concerns for pipelines, specifically in the NGTL system, that either have not or cannot be inspected using in-line tools. Since the conclusion of the NEB’s information gathering component of the audit in August of 2013, there have been three ruptures and four leaks on TransCanada’s NGTL system. Those lines that have been returned to service are currently operating under a 20% pressure restriction.

In response to this recent trend of pipeline releases, the Board has ordered TransCanada to reduce its maximum operating pressure on the unpiggable pipelines previously identified by TransCanada to have the highest risk. There are up to 25 of these lines. With these pressure reductions, the conditions necessary for the continued safe operation of this network of natural gas pipelines are maintained.

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