Steel plates Vs forging on Tubesheets

[aard]

Hi guys.

I have a doubt here and I hope you can help me.
I am working on a design of a tubesheet and the client wants to be made of SA-240 (Stainless steel)which the product form is plate according to ASME SECTION II D. All tubesheets I've seen are made of forged steel and that's why I Looked for a material with the same chemichal composition as SA-240 and I found SA-182.

I would like to see your point of view if the tubesheet is made from a steel plate over a forged steel.
Wich are the pros and cons if I choose the forged steel.

Thanks.

 

[MJCronin]

You have not told us what the diameter of the tubesheet is ...

Call up a HX fabricator and ask about the forged vs. non-forged availability and schedules for the material you desire.

It has been my experience that large diameter austenitic forgings are available internationally, but you may have to wait to get them.

MJCronin
Sr. Process Engineer

 

[marty007]

We use plate material for tubesheets all the time... very normal.

 

[r6155]

1) See API 660 8.1.5: Tubesheets that are welded to the adjacent shell or channel cylinder by use of a corner joint can be provided as forged or plate materials. If plate material is used, it shall be 100 % ultrasonically examined for laminations and other defects prior to attachment to the cylinder.

2) See ASME VIII Div 1 UW-13 (f) (2)

Regards
r6155

 

[GenB]

A lot of shops do use SA182 or other forgings which I think are no lo her allowed. If customer specs is set on plate why bother.

General Blr. CA,USA

 

[SnTMan]

aard, if the tubesheet has a hub, use a forging. If it is fairly thick, say 6" or so, consider use of a forging. If you don't want to inspect for laminations, use a forging.

Otherwise, use plate. As marty007 says it is very common.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand