Had a friend doing CNG filling controller development.
At one stage he removed a valve from live system to workbench and hooked it
up to the controller to test something.

No names but see CC line :-)

RM




Valve on. BANG. No damage - just a slug of CNG at maybe 3000 psi odd exiting
valve. Could have been fatal in ideally bad circumstances.
>Speaking of pressure guages ... a coworker in a lab once hooked a manometor
>(one of them big mercury-filled ones) to a T junction on the wrong side of
a
>needle valve thus placing it between the CO2 tank and the valve rather than
>between the valve and his test device.  When he opened the valve on the CO2
>tank, all the mercury blew out of the manometer and was dispersed widely
>about the room.  It took cleanup crews several days to vacuum enough
mercury
>out of all the little nooks and crannys in the lab so that the vapor levels
>were within OSHA limits.
>
>>Since this is gory story day.... A technician friend of mine was
>>needing a pressure gauges [oy, yoy] - wearing his regular glasses.
>>He plugged a gauge into an air hose to test it, turned the handle,
>>and blam! Explosion straight up into his face. Luckily I was 3
>>feet away at the time. Hands went up to his face, and blood started
>>pouring out thru his fingers. I got him to remove his hands so
>>I could appraise the damage. Luckily for him, it was only a
>>large shard of glass sticking out of his upper lip. Plus a
>>*very deep* gouge on one of his eyeglass lenses. Other people
>>came running down the hall because the explosion was so loud.
>>End of story.
>