9/32-in. diam, 4 places, 

 90 degrees apart 



Test Flange (mild steel) 



9/32-in. diam, 4 places, 

 90 degrees apart 



Backup Plate (mild steel) 



hamfer edge 



Indicates maximum and minimum dimensions allowable. 



Alignment Pin 



Figure B-18. Details of flange assembly used to determine the relationship between 



the window's critical pressure and t/Dj ratio for 1.50-inch (Dj) windows. 



39 



