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RE: [MW:4046] RE: 4006] cutting of 90 deg elbow in to 45 deg elbow

By Materials & Welding
Dear Gulam,
 
For cutting the elbow under any degree you can use the following formula
 

π x R x α/180 =L

π=3.14

α- a degree which you will cut the elbow

R- is a raduis of the internal and external contour
 
if you cut it through this formula you will get a mismatch max 2 or 3 mill.
 
best regards,
elshan.
From: armvasi@gmail.com
Date: Mon, 11 Jan 2010 20:46:01 +0300
Subject: Re: [MW:4018] RE: 4006] cutting of 90 deg elbow in to 45 deg elbow
To: materials-welding@googlegroups.com

Hai Bahtula,
 
Thanks for your reply. Ya we have almost 9mm hi-lo  through out the circumfrence. In some location around 13mm hi-lo.
 
Shall we accept this spools? 
 
 
Regards,
 
Gulam Kader 

On Mon, Jan 11, 2010 at 8:18 AM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
You may use S58 as per SA960 for special dimensions, however you may note that only fittings ends are calibrated to the bore diameter, hence in the middle (when you cut) you may get an oval shape resulting a mismatch with the bore of an adjoining component

Piping designers often ignore this (as they will have to generate new commodities for 30°, 45° etc.) instead they assume that 90 ° can be cut into the required angle at site and this is one of the major issue during fabrication

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of gulam kader
Sent: Sunday, January 10, 2010 3:24 PM
To: Materials & Welding
Subject: [MW:4006] cutting of 90 deg elbow in to 45 deg elbow

hi,

I am new to this group. In our project we have one problem. For shortage of 45 deg elbow, they want to cut the 90 deg factory made seamles elbow ( 52" size) in to 45 deg elbow. Is this allowed by the code or any restriction in the code. For this  which code we should refer. please help me in this issue.

regards,

Gulam Kader

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