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Cause found in Keystone Pipeline’s massive oil leak

(ABC) Bill Hutchinson, February 10, 2023

The leak was detected on Dec. 7 in Washington County Kansas.

A spill of more than 500,000-gallons of crude oil from the Keystone Pipeline in December in Kansas was caused by a combination of a faulty weld and “bending stress fatigue” on the pipe, the conduit’s operator announced Thursday.

TC Energy, the pipeline’s Canadian operator, said the cause was determined by an independent lab analysis on the failed section of the 2,687-mile conduit.

“Although welding inspection and testing were conducted within applicable codes and standards, the weld flaw led to a crack that propagated over time as a result of bending stress fatigue, eventually leading to an instantaneous rupture,” TC Energy said in a statement.

The faulty weld in a fitting girth connecting two sections of pipe “was completed at a fabrication facility,” TC Energy said.

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