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.
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shell plate insert for nozzle removal
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