ASME Certificared Stacked Type Shell and Tube Heat Exchanger for Crude Oil Desalting

ASME Certificared Stacked Type Shell and Tube Heat Exchanger for Crude Oil Desalting

The Desalt Crude Oil - ATM Res Exchanger is a high-performance, industrial-grade stacked shell and tube heat exchanger specifically engineered for refinery atmospheric distillation units (ADU) and crude oil desalting preheating trains. Modern refinery plants continuously face the challenge of expanding heat transfer surfaces within highly confined spatial footprints. By utilizing an advanced vertical stacked design, this configuration delivers double the required thermal efficiency without occupying additional refinery ground space. 

Technical Specifications & Standard Applications​

• Primary Applications: Crude Oil Desalting Preheating, Atmospheric Distillation Unit (ADU) 

• Design Standards: Engineered and stamped according to ASME Section VIII, Div. 1 and TEMA Class R standards 

• Equipment Tag: Desalt Crude Oil - ATM Res Exchanger

• Drawing Reference Scale: 1:20 standard engineering metadata.

​Allowable Loading of Nozzles

Advanced Stress Relief Mechanisms

• Sliding Saddles: the upper unit is mounted using heavy-duty sliding saddles equipped with low-friction PTFE or graphite slide plates. This permits longitudinal movement, relieving axial stress on the shells.

• Flange Edge Optimization

• Nozzle Load Mitigation

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Post-Weld Heat Treatment

• Stress Elimination: Full furnace Post-Weld Heat Treatment (PWHT) is executed on the completely welded shell assemblies and channel heads.

• Hardness Control: PWHT reduces residual stresses induced by heavy welding processes, controls heat-affected zone (HAZ) hardness, and significantly eliminates the risk of Sulfide Stress Cracking (SSC) and caustic embrittlement commonly encountered in crude desalter mediums.