PTFE Welded Wet Process Tanks Product Overview Overview We designed process and rinse tanks are constructed from a single sheet of application specific plastic material that is CNC machined. Welded corners can create particle/contamination traps and can leak due to workmanship, thermal cycling, and/ or prolonged chemical exposure.minimizes welding and provides smooth, seamless, rounded interior corners. We design and fabrication approach combined with over 40 years of wet