Re: [MW:16347] thinning of tubes

Hi,

 

It is simple to decide the max. no of tubes that can be plugged.

 

Thermal rating datasheet or HTRI report of an exchanger specifies the overdesign percentage. 

 

Calculate the redced effective area due to plugged tubes. Divide it by the current area and multiply by 100.

 

By this you will get revised over design %. If it is more than 0, the design is ok.

 

You can keep plugging the tubes upto 0% over design.

 

Regards;

 

Purav Desai

 

On Thu, Dec 27, 2012 at 12:15 PM, Mazlanaziz66 <mazlanaziz66@gmail.com> wrote:

Dear Kichu,

Its depend to the design process requirement. We cannot simply plug off the heat exchanger tubes , we refer to equipment designer or plant process engineer because if too many tubes plugged off it may effect the process flow.We need to know the minimum required tubes for the equipment. Generally 1 tube plugged off will not effect much to the process requirement.

Sent from Samsung Mobile

-------- Original message --------
Subject: [MW:16117] thinning of tubes
From: Kishore Kumar <kishore103103@yahoo.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
CC:

Dear all,

             How do we accept tubes thinning? We have tubes which is SA 179, 

19.05 mm and Dia, 2.11mm? and welded with tube sheets with exchangers?

            How do we accept or reject? How many tubes could be plugged if they are corroded externally? kindly give me your suggestions?

regards

kichu

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Regards;

Purav DESAI

puravdesai1@gmail.com

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