California Regulators Investigating PG&E Pipe Allegations

California regulators are investigating allegations by union members that there are flaws in the welds and corrosion repairs that Pacific Gas and Electric Co. (PG&E) completed last year as part of its testing, repair and replacement of more than 160 miles of natural gas transmission and distribution pipeline running through high consequence areas (HCA).

February 15, 2012

IPAA Scores Early Victory with EPA over Hydrofracking

A federal appeals court in Washington, DC, has rejected a motion by the Environmental Protection Agency (EPA) to dismiss a case brought by independent producers alleging that the agency failed to go through the proper channels to regulate diesel fuel used in the hydraulic fracturing (fracking) process.

January 24, 2011

Industry Briefs

El Paso Natural Gas Co. said there was no evidence of corrosion, weld defects, prior gas leakage or slow-developing cracks in the “branch” or “tap” connection of a pipeline that ruptured and exploded Nov. 5 in Bushland, TX. “Instead, we learned the rupture was the result of an upward force on the branch connection that put pressure on a small area on the carrier pipe that contained a ‘lamination.’ The force on the lamination caused a fracture to develop in the lamination near the weld of the branch connection to the carrier pipe, resulting in the rupture,” El Paso said. A lamination is a tiny area of separation within a pipe wall where the metal has not properly bonded to itself, and the lamination feature was not a defect under the regulations of the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration, the company said. Stress Engineering Services Inc. conducted the metallurgical analysis; “We don’t know yet what caused the upward force on the branch connection,” El Paso said. Information about the investigation is at

December 21, 2009

Transportation Notes

About 1 Bcf/d of NOVA capacity will be cut from May 31 to June9 as part of the system is inspected for stress corrosion crackingwhile tie-ins and other maintenance are performed. NOVA will take100 miles of 36-inch line between the Miekle River and Knightcompressor stations in northwest Alberta out of service during thattime. NOVA normally moves a total of about 11.8 Bcf/d, a spokesmansaid.

May 21, 1999
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