RE: Dimensioned Isometrics

From: <ed>
Date: Mon Apr 18 2005 - 08:11:00 EDT

Everything in English Units.............I don't understand much of the Metric System .

-----Original Message-----
From: PipingDesign@yahoogroups.com
[mailto:PipingDesign@yahoogroups.com]On Behalf Of Paul Bowers Sent: Friday, April 15, 2005 8:09 PM
To: PipingDesign@yahoogroups.com
Subject: Re: [PipingDesign] Dimensioned Isometrics

ed engalan wrote:

   > I'm afraid that you can't find anything published. There are so many variables
> it's hard to pin it down.
>
> The only thing I could give you is what our Estimators used. This is based on
> normal shop conditions. This time will include set-up and welds. Please take
> this with a grain of salt, because other companies might have their own set of
standards.
>
> So here it is on the average : 12.92 minutes per diameter inch of pipe.
>
> Example :
>
> 10" pipe : 129.20 minutes (2.15 hours) (set-up & weld)

Thanks, Ed. You're right; I probably should be looking for an estimator's handbook.

The 12.92 minutes (is that metric time?) figure reminded me of a recent MTO update extracted from a 3D piping model database. For some reason, there was about an extra 9,997,763 extra millimetres of 2" pipe to order and the software overestimated 0.002 metres of a larger pipe size.

Paul

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