"Ductile overload" was identified as the cause of a May 1, 2024 rupture of the Mountain Valley Pipeline in Roanoke County, Virginia in a report filed with the Federal Energy Regulatory Commission (FERC) and addressed to the Pipeline and Hazardous Materials Safety Administration (PHMSA) last week. Report preparer DNV GL USA, Inc. found that tension-related properties of an elbow fitting didn’t meet requirements for the grade of steel at the time …