Bob,
Were the nitrogen accumulators for high-pressure diecasting of aluminium by any chance? I worked for a company that made these machines, (Alfred Herbert, long since kaput) and the Foreman, Fred Bignold, had a party-piece where he put a nylon shirt ( remember those things!) into the injection sleeve and fired it into a test mould at 4000psi. The result was unbelievable- it came out as a disc 2" in diameter and 1/2" thick, and you could see the buttons inside it. A quick manipulation, and voila! the shirt was resurected- it was a bit creased though! [Linked Image]

PS. as is the vagaries of this modern mad world, it seems it's cheaper to buy a whole blinking compressor than just a receiver! Still looking!
Alan

Wood work but can't!