WASHINGTON, Oct. 2 -- Pipeline and Hazardous Materials Safety Administration has issued a rule called: Pipeline Safety: Standards Update-PPI-TR 4.
The rule was published in the Federal Register on Oct. 2 by Benjamin D. Kochman, Deputy Administrator.
Summary: PHMSA is confirming the effective date for the DFR that appeared in the Federal Registeron July 1, 2025. The DFR amended PHMSA's regulations to incorporate by reference the updated industry standard Plastic Pipe Institute (PPI) Technical Report (TR)-4, "PPI HSB Listing of Hydrostatic Design Basis (HDB), Hydrostatic Design Stress (HDS), Strength Design Basis (SDS), Pressure Design Basis (PDB) and Minimum Required Strength (MRS) Ratings For Thermoplastic Piping Materials or Pipe."
For ...