Hi All
i noticed a lot of talk recently about propane
tanks, the thread was a bit dead
but i gathered that the question of 'Is it worth using that old propane tank in
the garden', was dumped because the work would probably be more involved
to convert a tank than to just buy the tube and end caps.
My question though is, how does it compare with
cost? If the cost of the tank is say 1/2 the price would it be a viable
option?
I had the opportunity to check a propane tank up close recently; i
keep seeing psubs in all types of pressure tanks now...i think it's called
obsessive compulsive disorder.
Anyway, thinking as you do, that it would be a great size for a psub i
checked out the plate attached to one end.
The plate read:
Manf: Robert Bros
BS1500 Class 2
210psi and Full Vacuum
TP 310psi
310 Gals
A thought came to me, i remember on previous posts, a lot of talk about the
pressure vessel only being rated for internal pressure. If it states that
it can also withstand a FULL VACUUM, how does that affect its suitability as a
psub hull?
I may be completely wrong here but, can vacuum stresses be compared with
external pressure stresses?
It seems to me that if the internal pressure was reduced to 1/2 ATM then
wouldn't that be the same as applying 2 ATM pressure to the outside of a
hull?
i understand that once the pressure vessel used for a purpose it is not
intended for (ie. cut / welded etc.) the figures wouldn't be valid anyway, but
it makes me think
anybody got any ideas???
Regards
Steve Bosworh
UK
P.S. I did check out the manufacturer but they apparently
don't exist anymore and the BS number is now obsolete and doesn't say much.
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