What is PPI TR3?
Plastic Pipe Institute’s Technical Report 3, or PPI TR3, is a standard published by PPI which describes the testing, calculations and theory by which plastic materials are tested to determine their long term strength properties primarily for pressure piping applications. These long-term strength properties (up to 50 years or more) are published, by material, in PPI TR4, which lists this property as an HDB or hydrostatic design basis. These values are then used by engineers in designing plastic piping products for excellent long term service.
