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Vitrified Clay Pipe Engineering Manual - NCPI
The Vitrified Clay Pipe Engineering Manual has been prepared by the National Clay Pipe Institute (NCPI) and is offered by the member manufacturers of the Institute as an aid to those requiring engineering reference data applicable to the …
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Uniform Soil Groups for Pipe Installation
www.ncpi.org3 Bedding Classes – Class D, C, B, and Crushed Stone Encasement The previous standard included several bedding classes for proper support of the pipe
Low-Pressure Air Test for Sanitary Sewers - NCPI
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Low-Pressure Air Test for Sanitary Sewers - NCPI
www.ncpi.orgthe midpoint of the test section, a water infiltration test should be used. (See ASTM C1091 Standard Test Method for Hydrostatic Infiltration Testing of Vitrified Clay Pipe Lines) Safety The air test can be dangerous if a line is improperly prepared …
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