Flow Capabilities of Duraliner™

Flow within a host pipe that has been renewed with Duraliner™ equals or exceeds the original host pipe conditions.

To analyze flow capabilities, Duraliner™ with a starting stock of DR14 expanded inside a standard ductile iron host pipe is compared to a new ductile iron pipe of the same outside diameter. The "C" value for ductile iron pipe is 100 and for Duraliner™ it is 150. Over a range of diameters from 6" to 16" CIOD, Duraliner™ flow area is 15% to 20% less than ductile iron, but because of the higher "C" value, Duraliner™ will flow more volume (15% to 20%) at the same head loss, and will have less head loss (15% to 30%) at the same flow volume.

When Duraliner™ is compared to HDPE of equivalent outside diameter, a Duraliner™ renewed pipe will produce less head loss and more flow. The comparison was done with the thickest configuration using a DR14 as starting stock. Both Duraliner™ and HDPE were compared with the same "C" value of 150. As a result, HDPE flow area is 12% to 17% less than Duraliner™ . Duraliner™ will flow more water (11%-19%) at the same head loss and will have less head loss (6%-8%) at the same flow rate over the CIOD diameter range of 6" to 18".

Duraliner™ vs. Ductile Iron & HDPE

Flow within a host pipe that has been renewed with Duraliner™ is not reduced, despite the slightly smaller area of the pipe. For the same head loss as ductile iron, a renewed Duraliner™ pipe will yield more flow. For the same flow, Duraliner™ will produce less head loss. Experimental data is shown on the charts.

For the purpose of a conservative comparison, Duraliner™, with a starting stock DR 14 is used. This provides the thickest PVC wall, and therefore the maximum reduction of flow area.

The Duraliner™ host pipe is a standard Ductile Iron size pipe.

In comparing to Ductile Iron, the assumption of new pipe is used with a "C" value of 100. At the same head loss per length, Duraliner™ has more flow.

When Duraliner™ is compared to HDPE of equivalent outside diameter, a Duraliner™ renewed pipe will produce less head loss and more flow. This is because Duraliner™ has thinner walls than HDPE for the same pressure rating. The comparison was done with the thickest Duraliner™ configuration using a DR14 as starting stock. Both Duraliner™ and HDPE were compared with the same "C" value of 150.