Pipeline Safety: Exception for In-Plant Piping Systems

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Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

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Notice of Proposed Rulemaking (NPRM)Pipeline Safety: Exception for In-Plant Piping Systems Proposed Rule; Notice of Proposed Rulemaking (NPRM). Filed in Regulations.gov docket PHMSA-2025-0112.#

This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.