Paul,
Very well said! I would like to add a few lines in
this matter.
Pipe hangers are probably the simplest of the aids for
supporting horizontal pipes running under the floor or
roof, if they are very few in number, or if they are
in isolation. If there is a bunch of pipes running
(obviously) on the same BOP, bottom of pipe or TOS,
top of steel, a trapeze is the best solution. As a
good piping layout philosophy, pipes are to be grouped
together, for various reasons. A trapeze being
inherently stable, the degrees of freedom permitted
for the pipe, when it comes to the question of stress
analysis, becomes quantifiable and controllable. In
the hanger case, it is indeterminate and the movement
at the supporting point is anybody’s guess. So, the
selection depends to a greater extent, on the
technical purpose behind the support design.
Regards.
C. V. Gangadharan.
--- Paul Bowers <pbowers@pipingdesign.com> wrote:
> I've often wondered about the use of pipe hangers as
> compared to
> (relatively) rigid welded downcoming structural
> supports that allow lines to
> sit on steel. With a pipe hanger, I would expect
> that more lateral and
> longitudinal shifting would be permitted and thus
> the piping movement would
> be less controllable.
>
> Any thoughts from the field?
>
> Paul
>
>
>
>
>
>
>
>
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