No Repairs or Alterations shall be done by the welding process without the prior approval of an Authorized Inspector. All reconstruction, including Repairs and Alterations performed to bring the Air Tank to the original code of construction, shall be done in accordance with the NBIC.
In no case shall heat be used to bring the metal to a dull red color around an inspection port or other opening for removing threaded attachments. Evidence of bringing the metal to a dull red color may require the immediate removal from service of the Air Tank until supporting documentation is submitted to the Board by a Massachusetts registered Professional Engineer.
522 CMR 7.07