> For the cultural value:
> I tell , the newbies,for pipe, think in a 2" ( x") flow of liquid, then
> cover it with the pipe material.
>
>
>
> ----- Original Message -----
> From: "Christopher Wright" <chrisw@skypoint.com>
> To: <PipingDesign@yahoogroups.com>
> Sent: Sunday, September 05, 2004 6:30 PM
> Subject: Re: [PipingDesign] why nominal bore?
>
>
> >
> > On Sep 5, 2004, at 5:05 PM, Pete's Mail wrote:
> >
> > > you will find the bores are also not exactly 1/2" or 1" but have an
> > > odd exact dimesion
> > For cultural value, the reason the actual pipe ID is larger than the
> > nominal is to provide an allowance for fouling and scale. The reason
> > that 2x4 lumber is called 2x4 is that the finished lengths are made
> > from sections that actually are 2 inches by 4 inches. And the US sheet
> > steel gage numbers denominate unit weight rather than thickness. 3 gage
> > plate weighs 10.00 lb/ft2, with the nominal thickness based on a
> > density of 0.2904 lb/in^3, which in turn derives from taking the weight
> > of a steel plate 1 inch thick as exactly 41.82 lb. This isn't strictly
> > correct, but the nominal thicknesses got into common use before anyone
> > knew better. The best advice these days is to order by thickness and
> > don't bother about gage numbers.
> >
> > Christopher Wright P.E. |"They couldn't hit an elephant at
> > chrisw@skypoint.com | this distance" (last words of Gen.
> > ...................................| John Sedgwick, Spotsylvania 1864)
> > http://www.skypoint.com/~chrisw
> >
> >
> >
> >
> > =========================================
> > PipingOffice - Excel Spreadsheets for Piping Calculations
> > http://www.pipingoffice.us/
> > =========================================
> > Main site: http://www.pipingdesign.com
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>
Received on Mon Sep 06 12:04:00 2004
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