Table C-5. Hydrostatic Test Data for Nominal 1.50-Inch (D;) -2.25-Inch (Dq) 

 Flat Acrylic Windows, Test Specimens 21 -25 



(Sealed with grease; 



radial c 



earance 0.002 to 0.005 inch 



; nomina 



Dq/D; ratio 1.5) 





Parameter 



Specimen Number 



Value 





















21 



22 



23 



24 



25 



Max 



Avg 



Min 



Thickness (in.) 



0.121 



0.119 



0.119 



119 



0.119 



0.121 



0.119 



0.119 



Dq (actual, in.) 



2.245 



2.244 



2.246 



2.247 



2.246 



2.247 



2.246 



2.244 



Temperature (°F) 



70 



70 



70 



70 



70 



70 



70 



70 



t/D; Ratio (actual) 



0.081 



0.079 



0.079 



0.079 



0.079 



0.081 



0.079 



0.079 



Pressurization Rate (psi/min) 



310 



293 



429 



272 



326 



429 



326 



272 



Pressure (psi) 



Axial D 



isplacemc 



nt of Center Point 



on Window's Low- 



Pressure Face (in.) 



50 



0.012 



0.021 



0.008 



0.033 



0.030 



0.033 



0.021 



0.008 



100 











0.047 





0.047 





150 



















200 



















Displacement at Failure (in.) 



0.028 



0.038 





0.044 



0.049 



0.049 



0.040 



0.028 



Pressure at Failure (psi) 



90 



85 



60 



79 



111 



111 



85 



60 



Note: Grease seal was thin. 



53 



