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  1. Woodstock31

    SA-414 Grade G UCS-66 Curve

    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"...
  2. Woodstock31

    SA-414 Grade G UCS-66 Curve

    We are exempt from UG-20(f). We are under on the thickness requirement, we test pneumatically per UG-100, and apply Code Case 1518-5.
  3. Woodstock31

    SA-414 Grade G UCS-66 Curve

    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...
  4. Woodstock31

    SA-414 Grade G UCS-66 Curve

    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...

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