Reinforcement Calculation for Nozzles on flat plates for an Air Cooled Heat Exchanger

[Thaksen79]

Dear Members,

I would like to know what are the acceptable ways to perform reinforcement calculation on a flat plate for an ASME Sec VIII Div-1 stamp Air Cooled Heat Exchanger. The nozzles sizes are 4" and 8". The flat plate thickness shall be min 10mm.

Consider the case of Designing an Air Cooled Heat Exchanger. The design parameters are as follows,
Shell side
Design Press Int/ext=1.03/FV barg
Design Temp Int/ext=150/150 deg Celsius
MDMT= -5
Corrosion Allow = 0mm

Tube side
Design Press Int/ext=0.6/FV barg
Design Temp Int/ext=90/150 deg Celsius
MDMT= -5
Corrosion Allow = 0mm

The Nozzle sizes approx 4" Outlet and 8" Inlet which are welded to flat plates.

For more details of the exchanger construction please visit the below link

[link Point to another website Only the registered members can access]

[abuanaselmasry]

In such cases, I prefer to replace the total area removed. i.e. take the the repad OD equals to 2 times the pipe OD, then no need to perform reinforcement calculation.