[modeleng] Re: Vanes Boiler Works

I did some "googling" and found out some wall thickness figures on these 
gas cylinders, and I was surprised how thin these actually are. 
Obviously, they do not have to be heated, but most of these are under 2 
mm ! ( 0.08")
The fact still remains though, that, if a shell was found of sufficient 
thickness, it would not be and impossible proposition to build one of 
these "Vanes" boilers, or at least something very close to the original.
I believe the older style LPG tanks for cars to have a wall thickness of 
5,5 mm, so I that is correct, and one could be "liberated" (from a 
future pedestrian for example) there would be something going....all the 
junk that is attached in the middle of the tank could be thrown away, 
and if need be, the location of these "ornaments" could be made into an 
access hole
The wall thickness, of ALL the elements of these boilers are given as 
1/4 inch,so 5,5 mm is close enough to that, if the pressure would be 
limited to say 100 or 120 psi...
Patrick

TEL wrote:
> A lot thinner than you would expect Patrick - way too thin for a boiler
> shell
>
>
>
>   
>> Harry,
>>
>> I haven't cut up any propane cylinder yet, so I wasn't aware of the wall
>> thickness of them, do you have any data on that/experience with this?
>>
>> Patrick
>>
>>
>> Harry Wade wrote:
>>     
>>> At 05:38 PM 9/19/07 +0200, you wrote:
>>>
>>>       
>>>> Today, I took delivery of a bit of steam ephemera. - Patrick
>>>>
>>>>         
>>> Patrick,
>>>         Of concern should be the wall thickness of your barrel.
>>>       
> Although
>   
>>> 1/8" or even less will meet the mathematical strength requirements for a
>>> small say a small 100psi boiler, if the boiler is to have any life
>>> expectancy at all the walls (and heads) need to be thicker for heat and
>>> corrosion allowance.  For welded steel boilers for large scale model
>>>       
> locos
>   
>>> in the US, say those with barrel diameters of 8" to 12", 1/4" is an
>>> absolute minimun with a 5/16" or even 3/8" thickness being common.
>>>
>>> Regards,
>>> Harry
>>>
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