[labnetwork] Knife edge flange pressure application

[John Shott]

Steve:

Thanks for your contributions to this list ... you are one of the 
regular posters here from whom I always learn something useful.

I think that your referral to ASME is exactly on target.  In fact, I 
found the following link that describes some of the issues and 
challenges associated with trying to use Conflat flanges in 
pressure-rated vessels:

http://mtm-inc.com/reduce_project_risk/asme_commercial_vacuum_flanges/

Dennis, it sounds as if Meyer Tool & Mfg might be a good source of 
information if you are looking at exploring this issue further.

Good luck,

John

On 10/23/2014 7:14 AM, Paolini, Steven wrote:
>
> Dennis,
>
> In my humble opinion, I would refer to ASME for any pressure related 
> component use, they are quite particular in their specifying of 
> vessels and components.
>
> Steve Paolini
>
> Equipment dood
>
> Harvard University Center for Nanoscale Systems.
>
> *From:*labnetwork-bounces at mtl.mit.edu 
> [mailto:labnetwork-bounces at mtl.mit.edu] *On Behalf Of *Dennis Schweiger
> *Sent:* Wednesday, October 22, 2014 10:57 AM
> *To:* Fab Network
> *Subject:* [labnetwork] Knife edge flange pressure application
>
> Good morning all,
>
> Is anyone out there using a standard vacuum style knife-edge flange 
> (Conflat), in a pressure delivery application?  If so, I'd be 
> interested to hear your application, as well as any information you 
> might have in regard to certifying the usage for system integrity.
>
> Many years ago, I designed some vacuum chambers that had to have a 
> 150PSI pressure rating as a process safety, and we used knife-edge 
> flanges on the chamber.  The knife-edge flanges were then certified as 
> part of the pressure vessel rating on the entire vacuum chamber.  The 
> application I have now is strictly flange related, they're not part of 
> a larger system.
>
> Thanks,
>
>
> DennisSchweiger
>
> University of Michigan/LNF
>
> 734.647.2055 Ofc
>
>
>
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