Heat Exchanger hydrotesting
Heat Exchanger hydrotesting
(OP)
Going by the UHX & Tema, it states that both the shell side & tube side shall be hydrotested seperately.
I have a unit that the customer requested that the tube side not be rated as it has very low pressure.
According to the code, can we just test the shell side and still be ok?
We are thinking of putting 14.7 (atmospheric pressure) as a minimum on the tube side just to have it rated.
Has anyone ran into this before?
Thanks,
Jess
I have a unit that the customer requested that the tube side not be rated as it has very low pressure.
According to the code, can we just test the shell side and still be ok?
We are thinking of putting 14.7 (atmospheric pressure) as a minimum on the tube side just to have it rated.
Has anyone ran into this before?
Thanks,
Jess





RE: Heat Exchanger hydrotesting
In my opinion, the question that you are really asking is:
"Is it a good idea to have a STHE with ASME VIII design requirements on one side and "different" quality requirements on the other side ?"
Again, in my opinion, the answer is no...
I believe that it is a good idea to invoke ASME VIII (or whatever vessel code) on both sides of the HX.
This can be done by requesting a minimum design pressure of 15 psig on the low pressure side.
I do not believe that this will cost extra.....but I would like to hear from other engineers on this subject...
MJCronin
Sr. Process Engineer
RE: Heat Exchanger hydrotesting
Regards,
Mike
RE: Heat Exchanger hydrotesting
Our QC checked into it with the NB and they told us that what we need is the ASME/NB ID plate with only the shellside information and a second ID plate with only the tubeside information, but no ASME or NB stamp. We will then only hydro test the shell side and note in the remarks section of the data report, “the tubeside is less than 15 PSIG and outside the scope of the Code”.
Wanted to post this in case anyone else runs across this same issue.
Thanks,
Jess
RE: Heat Exchanger hydrotesting
RE: Heat Exchanger hydrotesting
Regardless. The internal on tubes can be exemtpted.
RE: Heat Exchanger hydrotesting
stamped with the Certi fication Mark with the U Designator". This will force the workshop to follow other ASME Code requirements (rather than design) related to the fabrication and inspection of the vessel in order to maintain the uniform quality of the HX.
Regards,
M.Salaheldin
Static Equipment Mechanical Design Engineer
RE: Heat Exchanger hydrotesting
RE: Heat Exchanger hydrotesting
RE: Heat Exchanger hydrotesting
I think the NB reply is also trying to say the same...
Baijuz