Jump to content

Featured Articles

Check out the latest featured articles.

File Library

Check out the latest downloads available in the File Library.

New Article

Product Viscosity vs. Shear

Featured File

3-Stage Propane Ref Performance


Reboiler Tube Rupture And Normal Condensing Duty

3 replies to this topic
Share this topic:
| More

#1 solnoid


    Brand New Member

  • Members
  • 4 posts

Posted 11 July 2017 - 09:17 AM



I'm looking at the relief valves on several distillation columns and in particular, the case of a reboiler tube rupture. I'm wondering if it is acceptable to take credit for the normal condensing duty of the overheads condenser during a tube rupture failure. It is my belief that losing cooling water to the overheads condenser and having a reboiler tube rupture would be considered double jeopardy.


Are there any precedents or code implications that would prevent me from doing so? I have not encountered any yet in my research. Thanks.

#2 Pilesar


    Gold Member

  • Members
  • 384 posts

Posted 11 July 2017 - 10:10 AM

Assuming normal condensing UA is reasonable for reboiler tube rupture case. You should not take credit for condenser U higher than U(service). Condensing duty can be recalculated for conditions at the relieving pressure so this likely results in a higher condensing duty credit than 'normal.' 

#3 Pilesar


    Gold Member

  • Members
  • 384 posts

Posted 13 July 2017 - 03:12 PM

Thinking more about my answer, it may not be conservative enough. If you have a turndown case for your overhead condenser, you should use that to constrain your condenser duty credit. You may have a reboiler tube rupture when you are operating the condenser turned down.

#4 spchauhan12


    Veteran Member

  • Members
  • 42 posts

Posted 28 July 2017 - 01:53 AM

Dear  solnoid,



Kindly have a look into API 521 section : Individual Overpressure Causes and Their Relieving Rates.





Similar Topics