[Gasification] wood gasifiers

[Greg and April]

Actually I could see a way to do it, but it would mean that the person doing 
the work would have to put some more effort into it.

>
> as you can see, this is a mess.  the assumption of the round end
> plates i'm cutting is that they either weld on the bottom of or around
> a cut tube.  the level of variation in diameter above makes this a
> difficult proposition.  or at least i have to provide the plates with
> extra meat and require the maker to grind them to perfect fit.  such
> is a bit of hassle.
>

Personally I would prefer this option since that reduces to total amount of 
stock shipped( not to mention getting it rolled out and welded ).    I 
wouldn't know where to take it to get it rolled, OTOH, even I can grind away 
a few .10's of an inch if need be.

There is this too, a welder can also build up material if need be.

Maybe I am just looking at it from the standpoint of my last full time job - 
which was a sheet metal tech, and we worked from the stand point of building 
up material, and then grinding it down to proper shape where no one would 
ever know that there was a weld at that point.

( You know your getting to be hot stuff with a grinder, when your using a 9 
inch pneumatic on really soft aluminum sheet metal, and the boss comes by 
and wants to know were the weld was ) <wink>

Greg H.

----- Original Message ----- 
From: "jim mason" <jimmason at whatiamupto.com>
To: "Discussion of biomass pyrolysis and gasification" 
<gasification at listserv.repp.org>
Sent: Monday, April 07, 2008 14:05
Subject: Re: [Gasification] wood gasifiers


SNIP

>
> well, this is the problem.  100lb tank is the 25gal tank i am
> referring to.  a .5" variation in diameter is significant if one is
> providing a part to weld around or on top of it.   here's the
> dimensions i seen so far (all OD and total height included foot and
> top valve shield)
>
> - mcmaster carr: 14.625 x 48.5
> - lowe's (worthington manf): 14.7 x 48
> - amazon (manchester manf): 15.1 x 46.3)
> - outdoor living (worthington manf): 14.75 x 49.5
> - scrap tank 1: 14.5 x @49
> - scrap tank 2: 14.875 x  @48
>
> as you can see, this is a mess.  the assumption of the round end
> plates i'm cutting is that they either weld on the bottom of or around
> a cut tube.  the level of variation in diameter above makes this a
> difficult proposition.  or at least i have to provide the plates with
> extra meat and require the maker to grind them to perfect fit.  such
> is a bit of hassle.
>
> i was originally trying to use the 100lb / 25gal tanks as the
> foundation for this kit, and do all the rest in rolled sheet tube.
> but i ran into so many problems with dimensional variations, as we see
> above, that i abandoned the propane tank for the outside cowling and
> went to the same rolled sheet tube.  with such, i can guarantee very
> good accuracy and ease of assembly across the whole thing.
>
> the rolled tubes also also greatly simply the shipping, which can be a
> significant when sending items like these around.
>
> j