Tightness/leak test of shell-and-tube heat exchangers

[ajcousins]

Hello all,

We have a handful of exchangers that we're pulling during our next TA to blast and clean the tubes. We want to do a tightness/leak test after we've cleaned them and put the bundles back. My question is what pressure should we bring the shell and tube sides up to? I was thinking 1.1x operating or 1.0x design.

Thanks in advance!

 

[Rputvin]

Does the nameplate specify a test pressure? Were they designed/constructed to any codes which would prescribe the required testing before returning them to service?

I'd start there.

What are the operating and design pressures? What is the fluid and what temperature does it run at?

 

[TugboatEng]

Hydro testing is usually done at 1.5x design. Your goal is to make questionable components fail, not to squeak them by.

 

[SnTMan]

ajcousins -- Leak testing is often done with low pressures air, say 25 psi, in conjunction with a bubble forming solution. For inaccessible areas, simply watching for a pressure decay may suit.

Mote sensitive media such as helium used with a sensitive detector is common as well.

Much discussion on the site, might try a search.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[MJCronin]

Cousin ....

Will you be using liquid or air to test your heat exchangers ? (you did not state) ..... Makes a big difference

MJCronin
Sr. Process Engineer