Double tube sheet..?

[SOps]

Hello,

Who can get me a drawing wich explains the working of a "double tube sheet" (for ex.: integrated in Heat Exchangers build for petro chemical installations).

Kind regards,

JP

 

[MJCronin]

SOps,

A double tube sheet design is commonly used only where there is:

1) Extreme danger of tubeside leakage into the shellside

2) Very expensive tubeside fluid, and therefore potential loss of revenue

3) a miliary applicaton (seawater HX on a submarine, for example)

The double tubesheet design frequently includes some type of alarm-type leak detection system between the tube sheets.

Double tube sheets will virtually double the heat exchanger cost..... there must be a good reason for their need.

A text by a Mr. Gupta discusses these.....(its in my garage)

MJC

 

[SOps]

MJC,

Thanks for your reply...

The fluids we´re talking about are Natrium (Sodium) / Isoprene on one side, cooling water on the other.
So we don´t want any cooling water near Sodium...! (the tubes ar also Bi-metallic).

What i need to know is: When they use a double tube sheet , are there around the tubes secondary tubes.
If Yes: * Only between the "double" tube sheets.
* Or, over the full length of the Heat Exchanger.

Mvg.

Jeroen

 

[Norphlet]

Professor J.P Gupta's book has the drawing of double tubesheets.

J. P. Gupta
Fundamnetals of heat exchanger and pressure vessel technology
Hemisphere Publishing Corporation
ISBN 0-89116-344-1

 

[MortenA]

You should try google (

http://www.google.com).

Search phrase: "double tube sheet" (remember the "&quot and you will get some references. They agree with MJC.

There are also links to manuf.

Best Regards

Morten

 

[MJCronin]

SOps,

Try these links for more double tube sheet details and information..

http://www.elliscorp.com/ludell/shell/shelspec.htm

http://www.wlv.com/products/databook/ch1_4.pdf

(The wolverine primer is excellent for the beginner)

Double tube sheets have undergone a revival because of the new "ultrapure" requirements of the electronics chip manufacturing industry. They show up in ultrapure steam generators and condensers.


MJC