Table C-25. Hydrostatic Test Data for Nominal 4.00-Inch (D;) -6.00-Inch (Dq) 

 Flat Acrylic Windows, Test Specimens 121 - 125 



(Sealed with grease; radial clearance 0.005 to 0.010 inch; nominal Dq/D: ratio 1.5) 



Parameter 



Specimen Number 



Value 





















121 



122 



123 



124 



125 



Max 



Avg 



Min 



Thickness (in.) 



0.236 



0.235 



0.228 



0.231 



0.235 



0.236 



0.233 



0.228 



D (actual, in.) 



5.987 



5.989 



5.988 



5.985 



5.987 



5.989 



5.987 



5.985 



Temperature (°F) 



68 



69 



69 



69 



69 



69 



69 



68 



t/Dj Ratio (actual) 



0.059 



0.059 



0.057 



0.058 



0.059 



0.059 



0.058 



0.057 



Pressurizotion Rate (psi/min) 



157 



400 



673 



425 



391 



673 



409 



157 



Pressure (psi) 



Axial D 



isplaceme 



nt of Cer 



ter Point 



on Window's Low- 



Pressure 1 



ace (in.) 



50 



0.084 



0.129 



0.108 



0.111 



0.128 



0.129 



0.112 



0.084 



100 





0.186 





0.155 



0.160 



0.186 



0.167 



0.155 



150 



0.174 







0.192 



0.208 



0.208 



0.192 



0.174 



200 







0.283 





0.240 



0.283 



0.261 



0.240 



250 











0.270 









300 







0.332 





0.300 



0.332 



0.316 



0.300 



350 







0.390 





0.320 



0.390 



0.355 



0.320 



Displacement at Failure (in.) 



0.200 



0.186 



0.422 







0.422 



0.269 



0.186 



Pressure at Failure (psi) 



190 



100 



350 



170 



360 



360 



234 



100 



Notes: 



1. Pressurizotion rate hard to hold due to pumping gage lag and air in line. 



2. Reading difficult to make at close Intervals. 



73 



