Tubesheet design load cases

pradeeptri · **Joined:** Tue Mar 24, 2009 8:51 am **Posts:** 12

During the design of the tubesheet how can we take the Load cases @ steam out condition or normal condition.

Dr. Koelbl · **Posted:** Wed Mar 25, 2009 10:48 am

Sorry, do not understand what the question is. Please be more detailed.

DK

akonrad · **Posted:** Wed Mar 25, 2009 12:24 pm

What is your tube bundle arrangement? U-tubes? Floating head? Fixed tubesheets with straight tubes?

There's a nice sentence in the UHX:

Code:

The various loading conditions to be considered shall include the normal operating conditions, the startup conditions, the shutdown conditions, and the upset conditions, which may govern the design of the tubesheet.

pradeeptri · **Joined:** Tue Mar 24, 2009 8:51 am **Posts:** 12

My doubt is regarding the Mean metal temperature of the tubesheet.

Suppose ,shell side temperature is given 310°C
Tubeside temperature is given 250°C
What is my tubesheet temperature during the load cases ?
Can any one help.

srinivasan · **Joined:** Tue Jan 27, 2009 6:33 am **Posts:** 79

The metal temperature depends on the heat transfer convective coefficient (in general);

Normal operating condition:
In case of tubesheet, the perforated portion is expected to have tube side temperature as mean metal temperature;
Your rim or shell or junction will be close to shell side temperature;

Upset condition
Depending on your thermal transient temperatures can vary during an upset condition as well as start up etc;

You are looking for knowing the allowable stress?

Even though I have not answered you directly, the above informations may be useful

Tubesheet design load cases

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