NCPI History

August 1, 2021

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

Massive bedding study established using load cells

August 1, 2021

New jointing materials are developed in partnership with the Ohio State University

August 1, 2021

Study of Manning’s “n” Factor conducted

August 1, 2021

Alan Shepard becomes the first American in space

August 1, 2021

Factory applied joints become the standard

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.

August 1, 2021

Wastewater treatment begins & infiltration (once seen as a benefit) is suddenly a liability.