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Leak Testing of Ppropylene Heat Exchanger

Leak Testing of Ppropylene Heat Exchanger

Leak Testing of Ppropylene Heat Exchanger

(OP)
Dear Guys

We have a propylene Heat exchanger with SA179 Killed tubes (no. of tubes 2465 ). Frequent tube leakage has been bothering us in this heat exchanger. Before, I proceed to explain my query, plz see the pressure specs of exchanger ( from construction drawing)

Pressure              Shell Side           Tube Side

Hydrotest             29.85 kg/cm.2        19.95 Kg/cm.2

Max.allow.            19.95 kg/cm.2        13.31 kg/cm.2
Working press.  

Operating pr.         16.19 kg/cm.2         5 kg/cm2 kg/cm.2                  

With the given parameters, i understand that shell & tubes are hydrotested separately at shop. However, at site while checking tube leaks during the shutdowns.

1. Which is the safe value of pressure testing i shell use for cheking tube leaks during shut downs?

2. What should be the medium of pressure fluid ?

3. Normally we are testing with the propylene available in the shell & use the soap bubble test to chek leaky tube.Is it ok ?

4. If I plan to use Nitrogen for PT, should there be any effect on the pressure values to be used for leak testing ?


Thanks in anticipation

RE: Leak Testing of Ppropylene Heat Exchanger

ak1965...

In what country is this HX located ?

In what country are YOU located ?

-MJC

  

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