Recent revisions led by the Plastics Pipe Institute’s Building & Construction Division resulted in improvements to the latest edition of the ASTM standard, F2389 Standard Specification for Pressure-Rated Polypropylene Piping Systems, which establishes requirements for polypropylene (PP-R and PP-RCT) piping system components including pipe, fittings, valves and manifolds. The revised standard is available at https://www.astm.org/f2389-24a.html.
The standard applies to hydronic heating and cooling, chilled water, water service lines, hot-and-cold water distribution, irrigation systems and other related fluid transport applications. Originally issued in 2004, revisions include:
- Pressure-temperature ratings used for PP pressure pipe systems are clarified and harmonized by adding new definitions for “design stress” and “design coefficient” and then applying requirements for these factors in a new Section 5.6.1.
- Oxidative stability (i.e., chlorine resistance) classifications are revised from CL-TD and CL-R to Classes 0, 1, 3 and 5 for consistency with other pressure pipe standards (e.g., ASTM F876).
- Revised marking requirements.
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