Re: [PSUBS-MAILIST] Request identification of pressure air tanks.

[Warren Greenway <opensourcesub@yahoo.com>]

I wouldn't worry about them being foreign tanks as
long as they are from the US or UK. The first set of
markings tells the maximum pressure, including a small
safety margin, at a given temperature. MOWT isn't on
the tanks I've seen. The other markings are 
manufacturer numbers for tracking the tank. They 
include date and sequential number. What size is the
thread? They usually have a 1/2" or 3/4" NPT on USA
tanks of that size for drainage. An NPT plug or valve
generally seals the hole. You should be able to buy
any
pipe/valve/plugs/adapters you might need from 
www.mcmaster.com 

Warren.

--- Carsten Standfuss <MerlinSub@t-online.de> wrote:
> Hi submadmans - I have a request. 
> 
> I can purchase two douzend units of second hand
> pressure air or gas
> storage tanks from a scrap place - and they look
> like new. Unfortunatly
> the are from foreign country - probably England or
> US. 
> 
> They have the size of our 50 Liter tanks and labeled
> as : 
> 
> MAW 4000 PSI APP 220 F/3 AT 200° 
> MOWT 4° AT 4000 PSI
> MAN FR N ° 4842/2/28/98
> build 1998
> 
> The have one valve on the top and a tread hole on
> the bottom. 
> 
> I realize that 4000 PSI is about 275 atmosphere
> (bar) but is this the 
> work, test or destroy pressure ? What means all the
> other marks ? 
> The tread hole to drainage (?) the bottles is very
> unusual here - is
> there a standard plug available ? Any help welcome. 
> 
> We have the first snow of the year today here and I
> make a quick picture
> of my sub. It should be at the Moki files.
> http://www.prismnet.com/~moki/subfiles.html
> 
> Best regards Carsten
> 


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