Mechanical Engineering, Pressure Vessel, Heat Exchanger, Risk Management, COMPRESS, Cladding randy bogard Mechanical Engineering, Pressure Vessel, Heat Exchanger, Risk Management, COMPRESS, Cladding randy bogard

Mechanical Credit for Cladding

Are you getting the credit you deserve?


The ASME Code allows you to take mechanical strength credit for cladding in design calculations. Most design engineers do not take credit for cladding and end up purchasing a thicker shell than necessary. 

Take a look at this simple internal pressure with cladding example:

Design P = 350 psi (2413 kPa)

Shell Material = SA-516 70

Cladding Material = SA-240 316L

MAWP from shell component: 343 psi (2365 kPa)

MAWP from cladding component: 40 psi (276 kPa)

MAWP from shell plus cladding: 383 psi (2641 kPa)

Using only the shell component for mechanical strength fails at the Design Pressure of 350 psi (2413 kPa).

Using the shell plus cladding for mechanical strength passes at the Design Pressure of 350 psi (2413 kPa).

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