GOAD COMPANY fabricates Polypropylene tanks using state-of-the-art plastic welding equipment. Tanks are fabricated with 90° thermally formed vertical corners and pressure butt-welded vertical joints, then extrusion welded sidewall to bottom construction.  Large tanks are fabricated with Steel Structure. This steel structure can be encapsulated with polypropylene, or with clear vinyl PVC for reliable visual inspection, as pictured below.