Titanium tubesheet Clad of Solid?
Titanium tubesheet Clad of Solid?
(OP)
Hello to all,
i have a H&E with titanium tube SB-338 Grade 2. Providing that the type is BES, is it possible to use a clad titanium tubesheet (shell side) or it must be solid? What about baffles?
Thanks
Peter
i have a H&E with titanium tube SB-338 Grade 2. Providing that the type is BES, is it possible to use a clad titanium tubesheet (shell side) or it must be solid? What about baffles?
Thanks
Peter





RE: Titanium tubesheet Clad of Solid?
RE: Titanium tubesheet Clad of Solid?
You need to check if whether both the shell and tubeside require titanium as the MOC.
Since titanium is not weldable with non- titanium products, the tubesheet is required to be cladded with titanium. With this, the Ti-tube to tubesheet joint can be seal welded or strength welded. Typically, we use a 10mm thick Ti cladding on the channel side irrespective of the tubesheet thickness. Occassionally a groove is also made in the Ti cladding and the tube is expanded.
You need to check if whether both the shell and tubeside require titanium as the MOC. in the current csase you have not specified this in your post. Be advised that the cost of a solid Titanium forging as a tubesheet will be tremendous and will be ruled out.
Hope this helps.
-jehan
RE: Titanium tubesheet Clad of Solid?
I would expect as a minimum the tubesheets would be clad on the tubeside.
Next, you need to determine the floating head cover material. If Ti is required here, it will pretty much have to be solid.
It is fairly common to apply internal coatings to CS channels with Ti tubes and clad tubesheets to protect the CS and anodic protection may be used as well.
If it turns out that Ti is required on the shell side, your only option is likely to be solid Ti construction.
Regards,
Mike
RE: Titanium tubesheet Clad of Solid?
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Plymouth Tube
RE: Titanium tubesheet Clad of Solid?
i can give you more information. The corrosive fluid (vapours from atmospheric distillation column) goes through shell side. The tube side fluid is Storaged crude.
I would like to have the following from you:
1. Solid or clad (only shell side) tubesheet.
2. Would it be recommend to install sacrifices anodes on shell side or any internal coating?
3. MOC of baffles. Could be Tp304?
Regards
Pedro
RE: Titanium tubesheet Clad of Solid?
What is the current corrosion protection of the shell? Clad with stainless steel? Internally coated?
Whereas you have stated that the shell side is vapor, sacrificial anodes will not perform. If water condensation will occur; how much?
RE: Titanium tubesheet Clad of Solid?
Regards
Peter
RE: Titanium tubesheet Clad of Solid?