Use of the latest edition of the NBIC for repairs and alterations of pressure retaining items is based on local regulatory or Jurisdictional requirements. If there are no requirements, the latest edition of the NBIC is acceptable for use.
Confusing post - What edition are you talking about - the code of construction regarding use of higher allowable stresses for re-rating or use of the NBIC for alterations ???????????????????????????
Jamesl answerd my question. It must be hard to ask a question. I thought
I had a short, concise question but metengr pointed out that spmething was missing!
Next time I'll try to be more careful.