Pipeline Safety: Passage of Internal Inspection Devices

Summary: On April 12, 1994, RSPA issued a regulation requiring pipeline operators to design and construct certain new transmission lines and certain existing line sections that contain replaced pipe or components to accommodate the passage of instrumented internal inspection devices. Responding to petitions for reconsideration, we suspended enforcement on some facilities and invited comments on proposed changes to the regulation. To help us reach a final decision on the petitions and issues raised by commenters, this notice seeks responses to the questions stated below under SUPPLEMENTARY INFORMATION concerning offshore gas transmission lines.