Yeah, I checked the certs for the tube and the yield was 70ksi and ultimate was 80ksi. Given the numbers it should have destroyed the tube at 11ksi. That one that burst was actually a little less than the calculated pressure it could hold. I think it burst at 9ksi(if that was the true value...
Well, I had the units tested again today and had some interesting results. The use of the water jacket during the test definitely was the cause of the bizarre readings I was getting and what left the impression of the leak. I am curious why this was the case but when it was in the water jacket...
That's a little sketch. The end caps are much thicker than the tube. There is about 0.5in of NPT thread in the end cap. I recognize the poor design in this situation; unfortunately for me, my only responsibility is to test these vessels and have them fabricated. I appreciate all the advice, good...
Thanks for the advice. I checked McMaster and could only find 6ksi hand pumps. But I do have a hydraulic jack system I might try to tap into. I believe they submerge these things for scuba tanks because its more of a consumer type test that the DOT requires, so it is found in marine shops...
The only reason it was submerged was that the company/location I work at does not have any hydro testing equipment. Had to take it to a local shop that tests scuba tanks and the such. Right before the test we were able to test one of the testing locations cylinders up to 10ksi. I did not use any...
The leak was not visible as the vessel was tested in a closed water jacket cylinder hydro testing apparatus. The machine is designed to test DOT rated cylinders. It was the closest testing facility I could find. The vessel is literally a 1in tube, say 1ft long with two end caps brazed to the...
I am working on a project where we have a custom pressure vessel that is made with 1in DOM tube with some end caps brazed onto the ends. The intention is to pressurize this up to 9ksi with nitrogen gas for a test we are doing. I had no involvement with the design of the vessel; however, I am not...
