NCPI conducts proprietary research that results in significant changes to ASTM C301 Standard Test Methods for Vitrified Clay Pipe based on dramatic improvements in pipe strength.
August 1, 2021
ASTM C425 (Specification for Vitrified Clay Pipe Joints Using Materials Having Resilient Properties) is issued. The standard is later renamed Specification for Compression Joints for Vitrified Clay Pipe Joints and Fittings.
August 1, 2021
The research partnership with Ohio State continues with further projects on joint performance and Performance of Test Bearing, Properties of Clay Flue Liners Tamping Process for Clay Pipe Forming, The Effects of Rate of Loading on the Supporting Stre...
August 1, 2021
ASTM C301 (Standard Test Methods for Vitrified Clay Pipe) is published.