I do believe we are exempt by UG-20(f). My apologies for the typo. We have a young group that is not very experienced with the code which is why we have a bunch of opinions.
The heads meet requirements UCS-79(d), UG-77(c), UG-79, & UG-81. The heads are not heat treated.
Head thickness: .250"...
SnTMan-
I appreciate the reply.
There are a couple of arguments that have been made:
1) Since the heads are die-formed they should be permitted to go to curve B since UG-11(b) talks about die formed heads.
2) Since SA-414 A is listed as a curve B material and SA-414 G has better strength...
Pressure Vessel built to Sect. VIII- Div. 1
There is some disagreement over what curve SA-414 G should be listed on in UCS-66(b). Our calc software automatically selects curve A. The SA-414 G material is in the shape die-formed heads. Impact test is not required for the construction of the...
