RE: Flange bolt-holes orientation

From: <Liu>
Date: Fri Sep 06 2002 - 13:00:00 EDT

Thank you for reply.
But if this is true, then what if I have another spool: Starts with a flange which is bloted with the first flange them an elbow which is going to diferent angle with the first spool.
If the fitter do these spools as you said: orientate boltholes either side of that" so how can these two spools match up on site since they going to different angle so are boltholes?
Thanks again.
Robert Liu

-----Original Message-----
From: <a href="/group/PipingDesign/post?postID=2qzA_rDLt5BSIndEbiU8I_7jaDvT1zYJsjxO4Sivk4f_c0rQsa6gUlMo2BmLXVFVbNMKaJ24DzoBe35cVMf7Pc0XgN9LGk44Qae_Iw">steve.mcshannon@expro.shell.co.uk</a> [mailto:steve.mcshannon@expro.shell.co.uk] Sent: Wednesday, September 04, 2002 8:27 AM To: <a href="/group/PipingDesign/post?postID=FnLp5XYK6Trk4deaHc-Sx24-y0OyaC5APe00JJsudoHKf2kXdw3J9qEeTHmNXSBZxG_a3GAvjePc79UvYCxHfgNiEg">PipingDesign@yahoogroups.com</a> Subject: RE: [PipingDesign] Flange bolt-holes orientation

ARE YOU BEING SERIOUS !??!!?! When the line is being fabricated as a spool, the fabricator doesnt know that the line is necessarily running NW (Very probably using spooling drawings). The bolts will still stradle the principle CL of the pipe. i.e. They will treat the line (running NW) as though it was running north and orientate the boltholes either side of that.

> -----Original Message-----
> From: robert.liu [mailto:robert.liu@ue-1.com]
> Sent: 04 September 2002 15:17
> To: robert.liu; PipingDesign
> Subject: [PipingDesign] Flange bolt-holes orientation
>
>
> All,
>
> Unless otherwise noted, piping spool fabricator will assemble
> flange so that
> the bolting holes straddle the principal center line of
> piping or equipment.
> so what if I have:
>
> 1) Piping runs from SE to NW then an Elbow tuning straight
> down, on the end
> of Elbow there is a flange. What orientation the bolting
> holes will be?
>
> 2) piping runs from SE to NW. In the middle of this piping
> run, there is a
> Olet type branch, after the Olet there is a flange. So what
> orientation the
> bolting hole will be?
>
> Thanks a lot!
> Robert Liu
>
>
>
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> Texas Flange - a good source for information on industrial
> flanges, all they ask is for referrals for designs they help with.
> 877-610-8924.
> www.texasflange.com
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[Non-text portions of this message have been removed]

Texas Flange - a good source for information on industrial flanges, all they ask is for referrals for designs they help with. 877-610-8924.
www.texasflange.com

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Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Fri Sep 06 13:00:00 2002