Since the issue of the 2007 edition of Section XI, the changes have been of two categories. In the first category are a number of changes to paragraphs in IWA-4000 to fine tune and maintain the base code requirements. The second category contains some revisions and the issue of new code cases. In the text that follows, the code text revisions and revised and new cases (as issued in supplements 1–12) are described based on the addenda in which their approved actions were issued.

References

References
1.
N-517-1, Quality Assurance Program Requirements for Owners, approved Feb. 20, 2004 (Ref. No. 03-1512), 2004 Code Cases: Nuclear Components, Supplement 1.
2.
N-504-2, Alternative Rules for Repair of Class 1, 2, and 3 Austenitic Stainless Steel Piping, approved Feb. 24, 2003 (Ref. No. 02-3736), 2004 Code Cases: Nuclear Components, Supplement 2.
3.
N-740, Dissimilar Metal Weld Overlay of Class 1, 2 and 3 Components, approved Oct. 12, 2006 (Ref. No. 04-1003), 2004 Code Cases: Nuclear Components, Supplement 11.
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