Recently we faced one issue. Shell side heat exchanger is by mistake subjected to Normalizing in place of PWHT. Material is SA387 Gr.11 Cl2 with 3 mm SS304L Cladding.THickness22mm+3mm cladding. So due to this hardness is reduced and it is in range of 140 BHN and overall length is increased. For this issue what will be best solution.
-- Equipment will subject to tempering at 720 deg C for 1 Hr. and then PWHT at 690 deg C for 1 Hour. Due to this heat treatment is there any problem come into materila? Is material property is above minimum required value? What will be effect on SS304L cladding after this much heat treatment? In this condition ,Will equipment suitable for application ? or any other option ?
Please need expert advice on this issue.
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