Paul,
It is an accepted practice, to provide a washer on the
FRP SIDE OF THE FLANGE, to distribute the loads evenly
over alarger surface.
Cheers!
C. V. Gangadharan.
--- Paul Bowers <pbowers@pipingdesign.com> wrote:
> Here's one for you plastic/fibreglass piping guys:
>
> What might be reasons to provide Van Stone/lap joint
> type connections
> (FRP stub end and FRP backing flange) on an FRP
> vessel instead of
> built-up welding-neck-style flat-faces?
>
> (OK, the backing ring flange can be rotated for bolt
> alignment - not
> that important)
>
> Using VS/LJ just adds the need for an additional
> spacer ring between the
> vessel nozzle and the attached RF steel valve as far
> as I can tell.
>
> Am I missing something?
>
> (Of course, everybody already knows that
> accidentally overtorquing bolts
> that join a stronger component to a weaker component
> can end up costing
> hundreds of thousands of dollars and serious project
> schedule disruptions)
>
> Paul
>
>
>
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