External loads usually govern the design of non-pressure pipes. For PVC sewer pipelines, one of the acceptance tests to ensure proper installation has occurred involves pulling a deflection mandrel through the pipe. Product standards for PVC gravity sewer pipes typically provide calculation methods and tables for sizing of these mandrels.
AWWA standards, on the other hand, are intended for pressure applications – hence there are no mandrel discussions, calculation methods, or tables provided.
The Technical Brief “Sizing of Deflection Mandrels for AWWA C905 Pipe” addresses this issue by explaining the calculation method and providing mandrel sizes for 14- to 48-inch CIOD pipe.
To find out more, click here to read the Tech Brief.