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tubesheet design temperature

tubesheet design temperature

tubesheet design temperature

(OP)
Hello Everyone,

I've got a simple question, is the tubesheet in HP feedwater heaters subjected to superheated steam from the shell side?

RE: tubesheet design temperature

No, the steam you get in the shell side is not superheated yet!

DHURJATI SEN

RE: tubesheet design temperature

Yes, the HP heaters have superheated steam on the shell side at the inlet.
That is why the first section is called 'de-superheater'.
In every one that I have seen they have added baffling so that the steam cannot directly impinge on either the tubes or the tubesheet.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: tubesheet design temperature

Obviously the tubesheet design temp must be the same as shellside design temp..

RE: tubesheet design temperature

(OP)
Yes I understand that there is a desuperheating zone, my question is whether the tubesheet should be designed based on the saturated temp. of steam or the superheat temp.

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