RE: Piping Erection

In a lot of cases the piping fabricators only supplied the spool (in big projects they come in modules say in a pipe rack and all u have to worry are the tie-ins). The mechanical works or field erection is again done by another contractor (lowest bidder). Of course the whole piping system has been prepared/specout by the piping engineer (again coming from another company but usually the EPC)

Under this scenario, Shop weld and field weld is important and should be indicnated on the piping iso in order that the piping system handover can be properly coordinated/scheduled/plan and to figure out your manpower loading (pipefitters and welders)- speciying it not a waste after all.

As Everett pointed out - the more field welds, the costlier it'll get and the longer it'll takes to complete the handover of the piping system but it offers the most flexibility as far as installation is concern.

• Original Message ----- From: Paul Bowers <pbowers@pipingdesign.com> To: <PipingDesign@yahoogroups.com> Sent: Thursday, June 07, 2001 7:26 PM Subject: [PipingDesign] Piping Erection

> Just wondering what the general consensus is on this, me not being
> a fab guy.
>
> Should field weld and field-fit welds be indicated on the piping
> isometric (I'm not referring to spool sheets)?
>
> Since it is the piping fabricator who will be installing the
> system, aren't they in a better position to determine where to
> break up the line? I suspect that most effort put into specifying
> FWs and FFWs is wasted.
>
> Paul
>
>
> _____________________
>
Received on Sat Jun 09 08:41:00 2001