ICA Condenser material choosing

[Asya]

ICA Condenser
option 1
"- Shell : LTCS + 3mm CA
- Tube : LTCS
- Tubesheet : LTCS + 6mm CA
- Channel : LTCS + 3mm CA"

or option 2

"- Shell : SA516 Gr.60N + 3mm CA
- Tube : SA213-TP304L
- Tubesheet : SA965-F304L
- Channel : SA516 Gr.60N + 3mm CA"

and also for Demi Water Tank
option 1
"- Shell/Roof/Bottom : CS + 3mm CA
- Internal Epoxy Phenolic Lining
- Steam Coil : SS316L + 0.5mm CA"

or option 2
"- Shell/Roof/Bottom : CS + 3mm CA
- Internal Epoxy Phenolic Lining
- Steam Coil : CS + 6mm CA (in Remarks)
- Steam Coil : SS316L + 0.5mm CA (in Att#1-Drawing)"

which one is better material and most cost efficient? and why

 

[EdStainless]

I'll comment on the demin tank.
What temp? That will determine how the coating holds up. Hot water requires careful coating selection.
I would suggest 2205 for the coils. Unless you are sure that your water will always be good demin and that they steam is also very pure. If there is ever a chance of impurities the 316 could be a bad choice.
And you never put a corrosion allowance on stainless steel. If it fails it will be by localized pitting and more thickness does not help. You want it as thin as possible to improve performance and minimize stresses.

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P.E. Metallurgy, Plymouth Tube

 

[georgeverghese]

A few missing bits here

a) what is ICA ?

b) For the demin water tank, attachment 1 is missing

Key corrosion protection for demin water tanks is N2 blanketing