shell plate insert for nozzle removal

[bhart192]

we have two nozzle penetrations 2" & 4" which are to be removed , 1/4" shell wall , table 9.1 in API 653 dimension "R" requires 6" radius for a shell insert patch ,in another para 9.3.1.7 list the minimum shell plate dimension as 4" , do we need to use a 12" round flush insert plate.

 

[IFRs]

12" is your minimum size. 9.3.1.7 is for lap welded patches - yours is a butt welded insert patch plate.

 

[MJCronin]

Uuuum..... Why must the tank nozzles be removed ??? What is the liquid in the tank ???

(Please don't answer "Because the boss wants them removed ...)

MJCronin
Sr. Process Engineer