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Pipeline Safety: Standards Update-ASME B31.4

PHMSA is withdrawing the DFR titled "Pipeline Safety: Standards Update--ASME B31.4," which published on April 24, 2026.

PDF versionFederalRegister.gov
Department of Transportation
Pipeline and Hazardous Materials Safety Administration
  1. 49 CFR Part 195
  2. [Docket No. PHMSA-2026-1535]
  3. RIN 2137-AG39

AGENCY:

Pipeline and Hazardous Materials Safety Administration (PHMSA), Department of Transportation (DOT).

ACTION:

Withdrawal of direct final rule (DFR).

SUMMARY:

PHMSA is withdrawing the DFR titled “Pipeline Safety: Standards Update—ASME B31.4,” which published on April 24, 2026.

DATES:

Effective July 31, 2026, PHMSA withdraws the DFR published at 91 FR 22039 on April 24, 2026.

FOR FURTHER INFORMATION CONTACT:

Brianna Wilson, Transportation Specialist, by phone at 771-215-0969 or by email at .

SUPPLEMENTARY INFORMATION:

PHMSA is withdrawing the DFR titled “Pipeline Safety: Standards Update—ASME B31.4,” which published on April 24, 2026 (91 FR 22039). A comment on the DFR provided technical justification to recommend that PHMSA await clarification by the standard developing organization to the expansion stress provisions in the 2022 edition of the standard.[1] Because PHMSA received adverse comment, PHMSA is withdrawing the DFR in accordance with 49 CFR 190.339.

List of Subjects in 49 CFR Part 195

  • Anhydrous ammonia
  • Carbon dioxide
  • Incorporation by reference
  • Petroleum
  • Pipeline safety

Accordingly, as of July 31, 2026, PHMSA withdraws the DFR amending 49 CFR Part 195, which published at 91 FR 22039 on April 24, 2026.

Issued in Washington, DC under authority delegated in 49 CFR 1.97.

Keith J. Coyle,

Chief Counsel.

Footnotes

1.  American Petroleum Institute & Liquid Energy Pipeline Association, Comments, Docket ID PHMSA-2026-1535-0003 (June 23, 2026). Pipeline Safety Trust also commented opposing the DFR. Comments, Docket ID PHMSA-2026-1535-0002 (June 23, 2026).

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[FR Doc. 2026-15579 Filed 7-30-26; 8:45 am]

BILLING CODE 4910-60-P

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91 FR 48306

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“Pipeline Safety: Standards Update-ASME B31.4,” thefederalregister.org (July 31, 2026), https://thefederalregister.org/documents/2026-15579/pipeline-safety-standards-update-asme-b31-4.