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Archived Rulemaking: Transportation of Natural and Other Gas by Pipeline; Period for Confirmation or Revision of Maximum Allowable Operating Pressure

51-fr-34987.pdf (455.44 KB)

This amendment clarifies a pipeline safety regulation regarding the period for comfirmation or revision of a pipeline's maximum allowable operating pressure (MAOP). Under the present regulation, the MAOP of a pipeline must be confirmed or reduced within 18 months after a population increase near the pipeline results in a more restrictive class location. Some operators have misinterpreted this rule to preclude confirmation of the pre-existing MAOP at a date beyond the 18-month period if the initial action taken is to reduce the MAOP. The amendment makes it clear that confirmation by pressure testing may occur at any time after the 18- month period, if the initial compliance action was to reduce the MAOP under § 192.611(b).

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Last updated: Thursday, August 16, 2018