# Pipeline Safety: Standards Update PPI-TR 3
> **Pipeline and Hazardous Materials Safety Administration** · Direct final rule (DFR); request for comments. · Published 2025-07-01 · Effective 2026-01-01 · 90 FR 28097
## Document
- **Document number:** 2025-12089
- **Category:** pipeline-safety
- **Sub-agency:** Pipeline and Hazardous Materials Safety Administration
- **Federal Register citation:** 90 FR 28097
- **CFR reference:** 49 CFR 192
- **Publication date:** 2025-07-01
- **Effective date:** 2026-01-01
- **DOT docket:** Docket No. PHMSA-2025-0131
## Abstract

This DFR amends PHMSA's regulations to incorporate by reference the updated industry standard PPI TR-3, Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS), Pressure Design Basis (PDB), Strength Design Basis (SDB), Minimum Required Strength (MRS) Ratings, and Categorized Required Strength (CRS) for Thermoplastic Piping Materials or Pipe. 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/2025/07/01/2025-12089/pipeline-safety-standards-update-ppi-tr-3)
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