My understanding was that as long as the NS-EW-UpDown straddling rule was observed, it would be impossible to misalign a flanged joint. Then again, I'm a theorist, not a fitter.
We all likely have much to learn from actual field practices, and this list is not just for engineering-type geeks. It's really for people who want to get insider information about piping design, fabrication and installation.
Good question, since most of us "designers" have little clue about how things are actually done.
Paul
> >The dowels are called among other things FLUPS or Flange Line
Up Pins.
> >It does sound like the best answer, and it provides a standard
that way
> >spools can be built away from where they are to be installed
and
> >provided the other guy leveled the holes every thing lines
right up.
> >At least that's how I see it.
> I have this odd feeling that I'm missing something. Why install
dowels
> instead of lining up using the bolt holes that are already
there? Seems
> like you could put a couple of bolts in the two top holes of the
fixed
> flange and line up on them. If the 1/16 clearance is too sloppy
find
> something like pipe or round bar and turn it to a slip fit and
use that
> instead of the dowels. The object of the whole exercise is to
get the
> bolt holes to match, anyway. Is there something else that the
dowels are
> needed for?
Received on Sun Jun 24 02:26:00 2001
This archive was generated by hypermail 2.1.8 : Tue Mar 09 2010 - 00:20:19 EST