×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

TEMPERATURE FOR FULL VACUUM DESIGN

TEMPERATURE FOR FULL VACUUM DESIGN

TEMPERATURE FOR FULL VACUUM DESIGN

(OP)
Hello all and happy new year,

In designing shell and tube heat exchangers (which are considered pressure vessels, so the question refers also to pressure vessels): what are the criterias or guidelines or rules for specifying the temperature at which full vacuum design mechanical calculation will be performed?

regards,
         roker
 

RE: TEMPERATURE FOR FULL VACUUM DESIGN


What temperatures are you operating at? What materials are you using?

RE: TEMPERATURE FOR FULL VACUUM DESIGN

You should set the vacuum design temperature in the same manner as you set the pressure design temperature. Generally, you determine the maximum likely operating and upset temperature that will occur at the maximum positive and negative pressures and apply an appropriate (and hopefully predetermined) margin. It's actually a bit more complicated than this; if there are combinations of temperature and pressure/vacuum that contend for the most servere, then you must determine which generates the worst stress situation.

RE: TEMPERATURE FOR FULL VACUUM DESIGN

Roker, I use the following phylosphy:

Specify full vacuum if:
1) Equipment is steamed out (only some companies).
2) Equipment may be subject to vacuum conditions during an operating cycle:
-- If evacuated during startup.
-- If vacuum can develop as a result of heat loss.
3) The corresponding temperature at full vacuum is a standard value (company specs) or the normal operating temperature.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources