ASME SEC 1:2004 pdf download SUMMARY OF CHANGES
The 2004 Edition of this Code contains revisions in addition to the 2001 Edition with 2002 and 2003 Addenda. The revisions are identified with the designation 04 in the margin and, as described in the Foreword, become mandatory six months after the publication date of the 2004 Edition. To invoke these revisions before their mandatory date, use the designation “2004 Edition” in documentation required by this Code. If you choose not to invoke these revisions before their mandatory date, use the designation “2001 Edition through the 2003 Addenda” in documentation required by this Code.
Changes given below are identified on the pages by a margin note, 04, placed next to the affected area.