Our polypropylene tanks are fabricated from high gloss, stress relieved, sheet stock up to 1" thick and conform to ASTM-4101, Group 1, Class 1, Grade II. Each tank is welded using a state of the art extrusion type welder with continuous strand capability. Tanks can be fabricated to include specialty liners such as Koroseal, PVC, or lead. KCH tanks can be equipped with specified rim widths, weirs, and fittings, and equipped with polypropylene encased tubular steel girth bands for added support, where applicable.