Consists of at least two independent strips of high strength steel are helically wound around the liner
Each strip has 2 asymmetric ribs formed, designed to interlock the outer layer and the inner layer � without needing an adhesive
A conservative failure criterion is used for design analysis of unlocking interlock, not burst.
Typically operating at up to 100bar. The design is suitable for pipes ranging from 6" (152mm) to 36" (914mm) with pipe tests (pressure, bend, material) completed on 6" diameter pipe segments, and feasibility FEA completed on diameters up to 36".