# Pipeline Safety: Standards Update-ASME B31.4
> **Pipeline and Hazardous Materials Safety Administration** · Direct final rule (DFR); request for comments. · Published 2026-04-24 · Effective 2027-01-01 · 91 FR 22039
## Document
- **Document number:** 2026-08053
- **Category:** pipeline-safety
- **Sub-agency:** Pipeline and Hazardous Materials Safety Administration
- **Federal Register citation:** 91 FR 22039
- **CFR reference:** 49 CFR 195
- **Publication date:** 2026-04-24
- **Effective date:** 2027-01-01
- **DOT docket:** Docket No. PHMSA-2026-1535
## Abstract

This DFR amends PHMSA's regulations to incorporate by reference an updated edition of industry standard ASME B31.4, Pipeline Transportation Systems for Liquids and Slurries: ASME Code for Pressure Piping, B31. This updated standard will maintain or improve public safety, prevent regulatory confusion, reduce compliance burdens on stakeholders, and satisfy a mandate in the National Technology Transfer and Advancement Act (NTTAA) of 1995.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/04/24/2026-08053/pipeline-safety-standards-update-asme-b314)
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