[Gasification] BOILER PHOTO

[Michael Redler]

Nope. It wasn't that. That's called a friendly suggestion. It's also 
referred to as a courtesy. Notice the friendly reply from Benjamin - a 
tell tale sign that a courtesy has been offered, accepted and appreciated.

Here's a hint Mark: Look for the words "Please don't encourage 
people..." (for example) and context, which usually in a patronizing 
way, tells a person or group of people (often people he/she hasn't met) 
not to do something because it might cause them injury. It's often 
followed by a passive aggressive suggestion that they'll probably get 
hurt if their advice is not taken seriously.

Here's an example:

"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."

I hope that helps.

Mike

Mark Ludlow wrote:
> Michael,
>
> Exactly what part of my post was "...paternal finger shaking"? It couldn't
> have been:
>
> "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!"
>
> ...because were YOUR words!
>
> Mark
>
> -----Original Message-----
> From: gasification-bounces at listserv.repp.org
> [mailto:gasification-bounces at listserv.repp.org] On Behalf Of Michael Redler
> Sent: Sunday, May 18, 2008 1:38 PM
> To: Discussion of biomass pyrolysis and gasification
> Subject: Re: [Gasification] BOILER PHOTO
>
> 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
>>
>> [snip]
>>     
>