Aidan Karley wrote:
In article , Badger.badger wrote:
And it's tight to hydrogen!
(This is a very non-trivial point if you're plumbing laboratory
machines.)

Even 200 Bar H2!

I think our stock bottles only come out at about 1800psi (about 120
bar?), but I don't see any reason for concern at higher pressures. Since
the bottles weigh about 80kg each, but have to be shipped in a 800kg bottle
rack, we tend to send out several bottles at once. 3 bottle in a rack
provides redundancy better than one bottle of 3 times the volume or
pressure), and redundancy is important against some idiot checking bottle
pressure by opening the bottle valve without a regulator/ meter in the
fitting (it has happened, repeatedly), or a novice being unable to undo the
regulator fitting with a 10" spanner, so he gets a bigger spanner, then a
bigger one, then a cheater bar, then shears the regulator fitting out of
the bottle valve (poor boy didn't know about left hand threads).

Only 3? We had 12 cyl MCP's until the fire....NOT H2 related BTW.