Our Hydrogen plant is designed by M/s Technip. In the feed desulphurisation section, an exchanger (Process gas from HT shift reactor Vs Sweet Naphtha) is suspected to be leaking. The MOC of the tubes and shell is 1 ¼ Cr ½ Mo. Sweet Naphtha is on tube side and HT shift effluent is on shell side and the exchanger is BES type (TEMA). The tube inlet is provided with an expansion bellow. Request others to share their experience on similar failure and the preventive measures / modifications undertaken to avoid the leaking of the exchanger in the similar service.
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