DP = 17.5 barg
DT = -46 / 80 deg C
Based on the above design conditions I have selected MOC for Shell/Dish plate SA 350 LF3 and same is procured by vendor. Now client is not accepting this material because of Ni content of 3.5% as it is specified in the client specification that 3.5% Ni shall not be used and asking me to go with SA 350 LF2 cl.1.
Since the material has already been procured, client is asking me to give proper justification to take deviation to specification for using SA 350 LF3 instead of SA 350 F2 Cl.1 material.
Please let me know if any other information is required
kindly help me to solve this issue.