‘Anomalies’ Found in Oil Pipeline

Wednesday, December 15, 2010 @ 06:12 PM gHale


Finding little problems before they become big problems or potential disasters is what safety systems are all about. So, that means a pipeline carrying oil from Canada to the U.S. will undergo more testing to ensure it remains safe.
Nearly four dozen “anomalies” found along a major pipeline that moves Canadian oil through several U.S. states, prompted a new round of tests to determine what is causing the potential problems and whether any of the irregularities violate federal guidelines.
Terry Cunha, spokesman for TransCanada Corp., which built the 1,087-mile Keystone pipeline, said the 47 anomalies are on segments of the pipeline in Missouri, Kansas, Nebraska and South Dakota. They may be the result of areas of pipe expanding as oil passes through, according to federal regulators.
Although there have been no major leaks and some of the irregularities “could be very minor,” Cunha said the new tests will diagnose whether any parts of the pipe have widened beyond the standard federal limit. The original tests occurred in November during an inline inspection.
Paul Blackburn, a lawyer for Plains Justice, a South Dakota-based environmental law non-profit that has been critical of the multi-phase Keystone pipeline, said too much expansion in a pipeline could mean a greater risk of the line breaking. The standard federal limit for expansion in pipe on such a pipeline is 1.5 percent.
“If they expand more than 1.5 percent, whether it ruptures or not is hard to say,” Blackburn said. “They have to be nearly perfect, and if it’s not, then the risk may not be today or tomorrow, but it may be 10, 15, 20 years down the road.”
Cunha said the earlier inspection complied with guidelines issued in October 2009 by the U.S. Pipeline and Hazardous Materials Safety Administration (PHMSA), the federal agency that oversees the nation’s pipeline network. Damon Hill, a spokesman for the agency, said in an e-mail Wednesday the pipeline underwent examination to ensure it hasn’t expanded beyond the limits mandated in those guidelines.
Hill did not say how much the pipe expanded because the evaluation is ongoing.
The anomalies were at nine sites in Missouri, 12 in Kansas, 14 in Nebraska and 12 in South Dakota, Cunha said. The company has since tested 10 of those sites, but has not completed evaluating the results. Cunha said the 10 sites selected for re-testing — six in South Dakota, three in Nebraska, and one in Missouri — showed possible expansion from 1 percent to 1.5 percent.
The new testing was likely to wrap up later this month, and the evaluation of those tests could take several more weeks, Cunha said.
“All new pipelines when they start, you’re going to see some expansion,” he said. “We want to continue to ensure the public in general that this is a safe pipeline.”
Cunha said the remaining 37 sites with anomalies would undergo more tests if the results from the 10 test sites showed they needed more testing. He said PHMSA has conducted 55 audits of the pipeline and has found the pipeline “in compliance and safe.”
The pipeline has been moving more than 250,000 barrels of crude a day down from Hardisty, Canada, through North Dakota, South Dakota, Nebraska, Kansas and Missouri to sites in Illinois. At its peak, expected in 2011, this section of the multi-phase Keystone pipeline will be moving about 435,000 barrels daily, Cunha said.
Another section of the Keystone pipeline that runs down Kansas to Oklahoma just finished and should begin operating by March 2011, Cunha said. A third section of the pipeline, Keystone XL, still needs approval from the U.S. Department of State because it crosses an international border.



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