Pressure Vessel Door Replacement

[IdanPV]

Hello all,

I am facing an issue with a pressure vessel door which need to be replaced.
The pressure vessel was manufactured in accordance with ASME VIII-1 and was hydrostatically tested and the FORM U-1 was signed by the authorized inspector.
The said vessel has a removable door which now need to be replaced. No welding is needed as part of the replacement process.

Is this replacement shall be consider a "Repair" which needs to made in accordance with NBIC Part 3, 3.2.2?
Is there a way or a wavier which will allow me to classify the door replacement as a "routine maintenance" or a "routine repair" and eliminate the need to comply with NBIC Part 3, 3.2.2 requirements?

Thank you.

 

[A8yssUK]

If you are asking, can I make this very important repair to basically the weakest part of a pressure vessel without having to do the proper checks afterwards... then I think you already know the answer.