Hi,
Dears,
HAY?
Can you elaborate about the Tubesheet material,here is case to change the material of tubesheet from SA-182 F 316L to SA-240 316 L. Can I use SA-240 316L in lieu of SA-182 F 316L when design on ASME SEC. VIII DIV.1 , TEMA-R ?Is there any limitation of thickness or temperature?Is there any other requirement. Process conditions are as under ;

Temperature = 200 C
Pressure = 50 Bar
Service = Water

Thanks a lot

DEEP

Definitely you can use it SA240 in place of SA182. But you have to recheck the followings:
1. Design with SA240
2. Client requirements whether they have asked forged tubesheet or not?

Hope it will help.

AND you got to check the attachment weld shell to tubesheet.
Butt-welding ends can require additional NDE! Check UW-13.

DK

DEEP,
How big is your tubesheet?

_________________
Konrad Anikiel

"Butt-welding ends" (in Dr. DK's post) means that tubesheet is hubbed.
Hubbed TS from a plate is permitted only when App. 20 is met.
UT is mandatory.

If tubesheet is not hubbed (whether it made of forged material or out of a plate) – shell connection forms a corner joint, thus, weld joint preparation in the flat plate shall be examined before welding. See UG-93 (d)(3).
(Corner joint is prohibited in a lethal service or steam generation case).

Please read your heat exchanger specification carefully. For ASME Code, it is acceptable to use Plate instead of forge for tubesheet. But actually, tubesheet material mostly uses forge. For your case, design pressure 50 Bar which is rather high. What's TEMA type and Size? Thicker plate sometimes are not easy to order and 2" thicker plate ASME Code requires additional inspection. And thicker plate material might be uniform.