Re: [MW:13359] Re-expansion of tubes for Air Fin Cooler.........

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

 

 

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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.