Flat Disc Acrylic Plastic Windows for Man-Rated Hyperbaric Chambers at the USN Experimental Diving Unit

Flat disc acrylic plastic windows have been designed, fabricated, evaluated and delivered to experimental diving unit for replacement of glass windows used to date. The large and the small windows have been found on the basis of an extensive evaluation program to be more than adequate for man-rated service under 450 psi maximum operational pressure in steel flanges with diameter of opening in flange of 5.000 and 3.000 inches. All windows were proof tested to 675 psi pressure at 120 F ambient temperature prior to delivery.