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Re: [MW:13368] Re-expansion of tubes for Air Fin Cooler.........

By Materials & Welding
Yes ..I agreed with Mr. Izad  ....

Suresh


On Thu, Dec 29, 2011 at 1:57 PM, hizad idris <hizad.idris@gmail.com> wrote:
Dear Vinod,
 
If still leaking after re-expand, my suggestion to plug off the tube, if the performance still within the required coolers performance. Normally , cooler have over design up to 20%. Need to calculate the cooler performance with the remaining tube, after plug off.

-izad-
 
On Wed, Dec 28, 2011 at 9:40 AM, Vinod Jotwani <poojvin@yahoo.com> wrote:
Dear Experts,
 
We have one of our fin fan cooler leaking from tube to tubesheet joint. The tube material is Duplex stainless steel.
 
We would like to carry out re-expansion of the tubes, your advise is needed for %age expansion allowed when these tubes are to be re-expanded. The tubes are in operation since last one year in Sour Water Recovery Unit ( H2S service).
 
Also if some body can share their experience in case of leakage even after re-expansion how to repair the tube to tube-sheet joint. For information the header is welded constuction.( Ref attached file )
 
 
Thanking you,
 
Vinod
 
 

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Thanks  & Best Regards,

Suresh

Mobile No: 91-92 92 905 905

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