[TheForge] Shop Air using Copper

[Woolley]

Mike Spencer wrote:
>> Old high pressure tanks work pretty well for air storage,...
>>     
>
> Since new Halon installations were banned, when a Halon-based setup
> needs to be re-filled or upgraded, it's completely replaced and lovely
> high-pressure tanks are scrapped.  These tanks (at least the ones I
> found) are rated for 650 PSI.  I got a big one, 60 or 80 gal (I
> forget) There was some welding to do, one fitting had to be bored
> and threaded and a drain valve installed in the bottom.  But there was
> no risk from explosion of combustible contents and its rating exceeds
> my 150 PSI shop pressure by a factor of 4.
>
>   
What is a Halon installation? W ho is likely to have the out of code 
tanks, industrial gas suppliers?