- In PipingDesign@yahoogroups.com, Paul Bowers <pbowers@p...> wrote:
> Steve McKenzie wrote:
> >
> > Gents+2
> > I have just had a friendly discussion with a South African
colleague
> > who maintains isos are normally dimensioned and are used as part
or the
> > formulation of the Schedule of Quantities; BOM; whatever.
> > My experience with isos is that they are comics that we give to
the
> > pipefitters as a rough guide. Occasionally I have used
dimensioned isos
> > to display fixed and toleranced dimensions around critical plant
for
> > shop spooled piping, but in general I just use them as a sort of
road
> > map. We are not talking 3D CAD here.
> > My question is do you guys normally put dimensions on Isos, and
if you
> > do what sort of plant do you normally work with?
>
> As far as I can see, the only purpose of a non-dimensioned iso is
to
> give a general idea of the routing (as you mentioned). Sometimes
I'll do
> large, roughly-dimensioned fluid system isometrics on 24"x36"
sheets
> by hand for preliminary pressure drop or stress analysis.
>
> I presume you are talking about projects with not too much piping
> involved where you have good fitters and welders and can oversee
the
> work being done.
>
> These days isos are generally auto-generated and dimensioned from
the
> model/database and look like crap (in my opinion).
>
> Paul
I work in oil&gas plants and all the iso's are dimensioned and also
MTO is provided on each sheet
Eby
Received on Thu Apr 07 18:20:00 2005