ow-pressure face under ambient 

 itmospheric pressure 



Do - 1.5 X Di 

 * Indicates maximum and minimum dimensions allowable. 



Figure 1. DOL type III flange configuration for short-term 

 testing of flat acrylic windows. 



Figure 2. Flat acrylic windows and 1.50-inch (D|) flange used to determine the 

 relationship between the window's critical pressure and t/Dj ratio. 



