Table C-4. Hydrostatic Test Data for Nominal 1.50-Inch (D;) -2.25-Inch (Dq) 

 Flat Acrylic Windows, Test Specimens 16-20 



(Sealed with grease; 



radial cl 



earance 0.005 to 0.010 inch 



; nominal 



Dq/D; ratio 1.5) 





Parameter 



Specimen Number 



Value 





















16 



17 



18 



19 



20 



Max 



Avg 



Min 



Thickness (in.) 



0.123 



0.112 



0.117 



0.115 



0.120 



0.123 



0.117 



0.117 



Dp (actual, in.) 



2.245 



2.243 



2.240 



2.238 



2.241 



2.245 



2.241 



2.238 



Temperature (°F) 





68 



68 



68 



69 



69 



68 



68 



t/D| Ratio (actual) 



0.082 



0.075 



0.078 



0.077 



0.080 



0.082 



0.079 



0.075 



Pressurization Rate (psi/min) 



153 



200 



292 



144 



480 



480 



254 



144 



Pressure (psi) 



Axial D 



isplaceme 



nt of Center Point 



on Window's Low- 



Pressure Face (in.) 



50 



0.010 



0.026 



0.014 



0.027 



0.017 



0.027 



0.019 



0.010 



100 



0.017 



0.042 



0.030 



0.047 



0.038 



0.047 



0.035 



0.017 



150 







0.036 





0.046 



0.046 



0.041 



0.036 



200 







0.041 





0.050 



0.050 



0.046 



0.041 



250 







0.051 





0.052 



0.052 



0.051 



0.051 



300 







0.057 





0.057 



0.057 



0.057 



0.057 



350 











0.063 









400 











0.073 









450 











0.083 









Displacement at Failure (in.) 



0.067 



0.060 



0.050 





0.083 



0.083 



0.065 



0.050 



Pressure at Failure (psi) 



147 



160 



338 



124 



450 



450 



244 



124 



Notes: 



1. Pressurized slowly to facilitate taking displacement data. 



2. Grease sealing and pressurization procedure may hove caused erratic results. 



52 



