pipingdesign: RE: Flange bolt-holes orientation

From: <Liu>
Date: Wed Sep 11 2002 - 19:06:00 EDT

Experts or seniors help!

Obviously Martine's opion does not match with Steve. Anybody can help me out here!!!!
Robert Liu

-----Original Message-----
From: Martine Lynch [mailto:Marly@statoil.com] Sent: Tuesday, September 10, 2002 10:34 AM To: PipingDesign@yahoogroups.com
Cc: 'PipingDesign@yahoogroups.com'
Subject: RE: [PipingDesign] Flange bolt-holes orientation

Bolt holes should straddle the horizontal or vertical centre lines or the plant north/ south centre lines when orientation is not given on the isometric.

Martine

                     "Liu, Robert"

                     <robert.liu@u        To:
"'PipingDesign@yahoogroups.com'" <PipingDesign@yahoogroups.com>
                     e-1.com>             cc:     (bcc: Martine Lynch)

                                          Subject:     RE: [PipingDesign]
Flange bolt-holes orientation
                     10.09.2002

                     16:04

                     Please

                     respond to

                     PipingDesign

Hi all,
Can anyone reply this question please? Is there such rule? I'm more confused.
Thanks
RObertliu

-----Original Message-----
From: gabriel.tossi@kvaerner.com [mailto:gabriel.tossi@kvaerner.com] Sent: Monday, September 09, 2002 11:20 AM To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Flange bolt-holes orientation

I think there must be a rule like "alway orientate one bolt-hole in UP-direction (for horizontal lines) or N-direction (for vertical lines) in accordance with the ISOMETRIC"

With something like this there must be NO problems (if both Iso's are correctly done!!!)

Regards,

Gabriel L. Tossi
Piping Material Engineer
* +31 (0)591 693462
* mailto:gabriel.tossi@kvaerner.com
KVAERNER Process BV
Houtsingel 5 - Zoetermeer
The Netherlands

From:      Liu, Robert [robert.liu@ue-1.com]
Sent:      Friday 6 September 2002 19:01
To:      'PipingDesign@yahoogroups.com'
Subject:      RE: [PipingDesign] Flange bolt-holes orientation

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: steve.mcshannon@expro.shell.co.uk
[mailto:steve.mcshannon@expro.shell.co.uk] Sent: Wednesday, September 04, 2002 8:27 AM To: PipingDesign@yahoogroups.com
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