PPI Adopts International Pressure Rating Method for Plastic Piping Materials

摘要

In addition to the HDB (Hydrostatic Design Basis) pressure rating obtained using ASTM D 2837, PPI (Plastics Pipe Institute Inc.) now also lists the MRS (Minimum Required Strength) pressure rating obtained with ISO 9080 in PPI's publication TR-4, "Hydrostatic Design Bases (HDB), Pressure Design Bases (PDB), Strength Design Bases (SDB) and Minimum Required Strength (MRS) Ratings for Thermoplastic Piping Materials or Pipe". This paper also summarizes other recent revisions to TR-4, which include the PDB (Pressure Design Basis) using ASTM D 2837 and the SDB (Strength Design Basis) using ASTM F 2018. Finally, we also discuss the latest addition, which will be to list PEX pipe chlorine resistance in accordance with ASTM F 2023.