In Reply to: Intregrity Testing of HDPE Tanks posted by Atom Saverse on 09/02/03 at 3:14 PM:
Finally an interesting post! It's been some time...
Frankly, I do not have a good answer to the question, but some thoughts:
1. Ultrasonics - a guy named Joseph Rose (who is now at Penn State) has done a TON of NDT research. Based on timing (I took his courses at Drexel in '87), I can only imagine that there is a commercially available ultrasonics unit that would allow scanning of critical areas in the target tanks.
2. Dyes/Penetrants - I suspect that large PE tanks are made using rotomolding, so they have a rough surface finish. There have been dyes and penetrants used in metals (many years ago), some of which may be usable for PE. Chances are good that this approach will work, as PE is so chemically resistant.
Good luck, and I hope we get some responses to this practical question. If I can help in any way, feel free to call or post a followup.