RE: Flange Failure Images

Yep B or C.
Nice sketches. Will send you some more crayons if you promise not to eat them, and stop sniffing the hi-lighters.

Cheers

Steve

-----Original Message-----
From: Paul Bowers [mailto:pbowers@pipingdesign.com] Sent: Saturday, January 31, 2004 5:03 AM To: <a href="/group/PipingDesign/post?postID=98W3H6LR7P_BAb6XNOya5m-9kgzn386EEwMayrc2WMKrurS5erq5glQjLpT7Y0YLsRpDRt0PYAOcoQma06EVFpzNhe5xr8g">PipingDesign@yahoogroups.com</a> Subject: Re: [PipingDesign] Flange Failure Images

Like example C on the following sketch?

<a href="http://www.pipingdesign.com/drawings/flange_assembly.jpg">http://www.pipingdesign.com/drawings/flange_assembly.jpg</a>

I had already eaten all my Crayons so I had to use hi-liters for colour.

Paul

• Original Message ----- From: "Steve McKenzie" <mechproj@xtra.co.nz> To: <PipingDesign@yahoogroups.com> Sent: Friday, January 30, 2004 5:40 AM Subject: RE: [PipingDesign] Flange Failure Images

> Paul
> guess I didnt explain clearly. I think it is probably a lap flange or
> similar stub end with a plate flange fitted. If the plate flange does
not
> have a correctly dimensioned chamfer or bevel on its inner bore, it
will
> bind on the stub end fillet radius, preventing the flange inner face
from
> bearing on the outer face of the stub end. But with some big spanners
we can
> crank it up (as we do) which will crush the flange bore onto the stub
> fillet, and bend the flange into a cone shape. The tension on the
flange
> bore could easily cause the cracks shown provided the stub end doesnt
> collapse first. Diagnosis - wrong flange for the job. Obviously,
because the
> bloody thing broke.
>
> Hows that for a stack of interdependent assumptions based on a couple
of
> happy snaps?
>
> I wonder what the real cause was..........
>
> Cheers
>
> Steve
Received on Fri Jan 30 16:08:00 2004