Open source confessions of an "Old Space" engineer.
Friday, June 20, 2008
Floats as Tanks
This is a picture of hydrotesting I did on a 6" 316 Stainless steel float from McMaster-Carr (2762K49). It failed at 2150 psi. Interestingly, the failure was a tiny pinhole that opened right at the weld termination. My grease gun was not able to pump enough water fast enough to get the pressure higher higher than 2150 once the hole opened up.
I proof tested a second of these floats to 1900 psi without failure. And 3 more were tested to 1500 psi.