You can find the required information from API 660, (9.10) Tube-to-
tubesheet joints. The content is given as allowable tube wall
thickness reduction of roller expanded tube to tubesheet joints.
Furthermore, you can tell us what material you are using for the
percentages
Regards,
Muhammad Ali
M.E. Mechanical, CSWIP 3.1
Executive Engineer, Inspection
PRL
On Sep 20, 9:24 am, Karthik <karthik6...@yahoo.com> wrote:
> Hi,
> Please find below the formula for tube expansion percentage.With this you can fix the max.allowable expansion percentage in relate to the thickness of the tube after expansion. also you can find the thickness of the tube after expansion by using this formuls(Tube ID after expansion-Tube OD / 2).In no case it will not be less than the design thickness of the tube.
> The tube longitudinal and compressive stress shall be calculated by TEMA RCB7.23 or 7.24.
>
> Formula.
> K = ((d2-d1) - (H-D))/2T X 100%
>
> d2 = (H-2T+(Kx2T)/100)
>
> Pls.see the attached file of sample calculation sheet.In this sheet you can input your datas and you will get the thickness reduction and tube ID after expansion.
> You can fix the K from 3% to 15% or what will be the minimum and maximum expansion percentage you fix.
>
> Where,
> K-Expansion percentage,decrement of tube thickness
> T-Tube wall thickness
> d1-Inside diameter of the tube before expanding
> d2-Inside diameter of the tube after expanding
> D-outside diameter of the tube
> H-Inside diameter of the tube sheet hole
>
> Thanks & Regards,
>
> (karthik)
>
> You can just make this in an exel sheet
>
> Karthikeyan.S
> QA/QC Manager
> Getabec Energy Co.,Ltd.
> 379,Moo6,Soi8,Nikhomphatana,
> Rayong-21180,
> Thailand.
> Phone: 0066 38 897035-8 (Off)
> Fax: 0066 38 897034
> Hand Phone: 0066 892512282
>
> --- On Sun, 9/19/10, manoj john <manojac...@gmail.com> wrote:
>
> From: manoj john <manojac...@gmail.com>
> Subject: [MW:7094] TUBE TO TUBE SHEET EXPANSION
> To: materials-welding@googlegroups.com
> Date: Sunday, September 19, 2010, 3:29 PM
>
> Dear All,
>
> I have to do tube to tube sheet expansion. This is as per TEMA and joint is double groove full expansion. My question is from where i can get a reference from the code for the percentage of expansion.
>
> Thanks in advance.
>
> Best Regards.
> Manoj.
> --
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>
> Calculation sheet.xlsx
> 14KViewDownload
--
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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