Please read API 653 Addendum 2 Nov 2005
APPENDIX F--NDE REQUIREMENTS SUMMARY
F.2 Visual Examination
F.2.1 Visual examinations are required for:
a. Cavities from removal of repads (see API Std 653,
12.1.2.2).
b. Completed welds of stress-relieved assemblies after stress
relief but before hydrostatic testing (see API Std 653,
12.1.2.4).
c. All fillet welds and completed repairs of fillet welds (see
API Std 650, 5.3.2.2 and API Std 653, 12.1.3.3).
d. Completed welds of new permanent attachments and areas
of removed temporary attachments (see API Std 653,
12.1.4.2).
e. New shell plate-to-shell plate welds (see API Std 653,
12.1.5).
f. Tack welds left in place (see API Std 650, 5.2.1.8).
g. Bottom plate and all welds, including the weld attaching a
patch plate to the bottom, for new bottom plates (see API Std
653, 12.1.7.1).
h. Root and final weld pass of patch plate to bottom in the
critical zone (see API Std 653, 12.1.7.2).
i. Areas of a bottom plate repaired by welding (See API Std
653, 12.1.7.3).
j. Areas of a shell plate to be repaired by welding (See API
Std 653, 12.1.8).
k. Cavities from removal of weld defects (see API Std 653,
12.1.3.1).
l. Annular plate butt-welds root pass and final pass (see API
Std 653, 12.3.2.3.1b).
m. Repaired areas of the shell-to-bottom weld (see API Std
653, 12.3.2.4.2).
F.2.2 The examination acceptance standard is API Std 650,
6.5.
F.2.3 There are no requirements for examiner qualifications.
F.2.4 There are no procedure requirements.