Historically, SA-105 was not permitted for tubesheets and hollow cylindrical forgings for shells, per the SA-105 Scope. This prohibition is independent of Code of Construction.
Now, for Sec VIII, Div 1, starting with, I believe, the 2013 Edition SA-105 is permitted for tubesheets subject to certain conditiions, see UG-6(c).
I do not know if it is permittted for other Divisions or Codes.
So, maybe, maybe not, it depends on the Code of Cconstruction
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
SnTMan is correct, it looks like ASME Section VIII Div. 1 (and Section VIII Div. 2) were modified in 2013 to allow SA-105 material to be used for tubesheets as long as it meets the additional requirements of UG-6(c), mainly that an austenitizing heat treatment be performed.
One way of avoiding this issue is to specify SA-266 material when using carbon steel forgings as tubesheets.
Also note that SA-105 ASME B16.5 blind flanges cannot be used for tubesheets for ASME Section VIII Div. 1 construction.
"Question: May forged SA-105 blind flanges complying with ANSI B16.5 in pressure Classes 150 through 600 be utilized as heat exchanger tubesheets for Section VIII, Division 1 construction provided that both flange and tubesheet calculations are performed to verify that the thickness and bolting meet the requirement of the Code?
Reply: No. (See para. 1.1 of SA-105 for scope limitation.)"
Also note, that if using SA-105 to Section VIII Div 1 2019 edition, that the allowable MDMT is now warmer than in the past unless you normalize and use fine grain practice, so don't let that catch you out either.
