[Al Skierkiewicz]

Scott,
I hope you kept the pieces. I suspect Andy and Mark would like to take a look at these and contact the manufacturer. I certainly would like to see them.
The OSHA statement comes from an industrial accident in Texas at a chemical plant or refinery, I can't remember which. The plant was plumbed for pressure lines between buildings and process positions. As an employee was walking past one of the pipes, it burst sending shards into his arm. With a little research you can find the original report and findings of the resulting investigation.
From the pieces shown, it is possible that the first failure occurred at the fitting but the resulting failure of the rest of the tank is unusual. Was the tank chucked up in a vise at some point to assist with fitting insertion? Is it possible that the two tanks were close enough that the failure of one caused a failure in the other? What compressor were you using? The large Thomas compressor can get up to 150-160 psi if the pressure relief valve is not calibrated but that should be well below the failure point for these tanks.