llnrlassified 



Security Classifi< 



Pressure vessels 

 Internal pressure 

 Stacked ring 

 Segmented design 

 Circular polygon segments 

 Tie-rod end closure 

 Maraging steel 

 Dome-shaped end closure 

 Shear-pin holes 

 Stress raisers 



DD ,?o''v"..1473 BACK) 



(PAGE 2) 



Unclassified 



Security Classific 



