Tube sheet material in S & T heat exchanger

[Rakesh2560]

hi Everyone,

I have a question regarding the material used in Tube sheet construction I am in process of inkind replacement of tube bundle in one of our shell and tube heat exchanger the vendor has suggested me a change in tube sheet material from SA 515 Gr 60 SS clad to A266 Gr 4 SS clad .I just wanted to know that if i except this change will their be any change in my tube sheet thickness ? Will i need to make new calculations again ?

 

[Afox88]

Assuming you are working with ASME Section VIII-1, CODE requires you to do CODE calculations based on the material that you will be using, which means you will have to redo the calculations.

On the bright side, based on ASME Section II-D, SA-266 Grd 4 has higher stress values than SA-515 Grd 60. Therefore, depending on the size of your exchanger, the tubesheet may become significantly thinner by switching to SA-266 Grd 4.

 

[MJCronin]

You should also establish if the HX was designed to TEMA standards. (this should be noted on the design drawings)

TEMA also has restriction/requirements for the tube sheet design and materials....

MJCronin
Sr. Process Engineer