The steel cylinder is fabricated from light gauge steel sheets. The accurately sized steel bell and spigot joint rings are welded to the ends of the steel cylinder which is then hydrostatically tested to ensure a water tight membrane.

The tested cylinder is positioned within a vertical form and high quality concrete is cast both inside and outside, encasing the cylinder. Mechanical vibration is applied to the casting form to provide a dense envelope of concrete around the cylinder. The fresh core is steam cured to ensure that a minimum specified compressive strength is obtained prior to the prestressing operation.

The core is helically wound with high tensile steel wire under controlled tension and spacing providing a predetermined compression in the concrete core. This is followed by a dense cement-rich mortar coating using the same procedure as for LCP.

Hyprescon manufactures ECP from 1050mm (42in.) to 3600mm (144in.) diameters at the Uxbridge, Ontario facility and the St. Eustache, Quebec facility.