[Gasification] BOILER PHOTO

[Michael Redler]

Benjamin,

Drama not withstanding, Mark is right. The photos gave me a similar 
impression.

The American Society of Mechanical Engineers is a well known, worldwide 
organization which owes it's existence to a group of concerned engineers 
who gathered to discuss the standardization of pressure vessel 
construction. I suggest you take advantage of the last 128 years of 
standards and diligently apply them to your work as soon as possible.

http://www.asme.org/Codes/International_Boiler_Pressure.cfm

It wouldn't hurt to find a certified welder either. In fact, I strongly 
encourage it!

Unlike Mark, there won't be any paternal finger shaking from me, telling 
you what you should or shouldn't do. As long as you've done your 
research and have a clear understanding of the relationship between risk 
and safety, I encourage you to stay sharp and keep us informed of your 
progress.

Good luck!

Mike

Mark Ludlow wrote:
> Benjamin,
>
> Please don’t encourage people to build high pressure boilers, particularly
> with welds as shown in your photo. At 374C, steam is at the critical state
> where vapor and liquid are indistinguishable. Higher temperatures, such as
> the 450C you mention are supercritical states, not merely superheated. 374C
> is equivalent to 3206 psia (221 bar). Metallurgy, safety systems, water
> chemistry, controls—all are critical and not the kind of stuff built in a
> barn. 
>
> If you build this, you may want to notify your neighbors to back-off for a
> km or two for the maiden voyage! Plus, I’d like to say that it’s been
> interesting knowing you.
>
> Mark
>
> From: Benjamin Domingo Bof [mailto:benjaminbof at yahoo.com.ar] 
> Sent: Sunday, May 18, 2008 10:22 AM
> To: mark at ludlow.com; Discussion of biomass pyrolysis and gasification
> Subject: Re: [Gasification] BOILER PHOTO
>
> Mark, with this layout must be using semiespherical caps at tanks tips. 
> With proper choice of wall tubes thichkness you are applying this
> 700 psi pressure over low diameter tubes.
> All weldings are simple to make and control by hydraulic test.
> Regards, Ben
>
> Mark Ludlow <mark at ludlow.com> escribió:
>
> Benjamin,
>
> No 700psi boiler is easy to build!!
>
> Mark
>
>
>