I am working on a sysytem where the line size 42" and this line is cladded with alloy steel( 1/8 " thk. )
My approach is - changing the density of the material ( Average of C.S. & alloy material )and using the thickness of the C.S. material( THickness of the cladding material not considered )

Iwant to know my approach is correct or not.
Secondly as I am not considering the cladded thickness whether the nozzle load I will be getting is correct or not.