YUHONG produce a high-capacity, custom-engineered shell and tube heat exchanger designed for demanding service in the oil and gas industry. Built to the highest standards, including TEMA Class R and ASME Section VIII, Div. 1, this unit exemplifies robust engineering for critical heat transfer applications between process streams. Its primary function is to efficiently recover heat from Atmospheric Residue to preheat Desalted Crude Oil, significantly improving energy efficiency and operational economics in refinery processes.

The heat exchanger is built as a TEMA Type AES (externally sealed floating head) design, which is ideal for applications with a large temperature differential between the shell and tubes, allowing for thermal expansion without stress.

Key design features include:

• Tubes:​ 1,250 tubes with an outer diameter of 25.4 mm, arranged on a 31.75 mm 45-degree triangular pitch
• Baffles:​ Features segmental cross baffles with a 23% cut and a spacing of 280 mm
• Nozzles:​ Equipped with 8" 300# flange connections on the shell side and 10" 300# connections on the tube side

• Tubes & Tubesheets:​ Tubes are made from SA 213 Gr.T91, and tubesheets from SA 182 Gr.F91
• Shell, Channel, and Covers:​ Constructed from SA 387 Gr.5 Cl.2, a chromium-molybdenum alloy steel
• Gaskets:​ All gaskets (shell, tube, and floating head) use Soft Iron filled with Graphite

• Design Code:​ ASME Boiler and Pressure Vessel Code, Section VIII, Division 1.
• TEMA Standard:​ TEMA Class R (for severe refinery and process applications

This heat exchanger is specifically engineered for the hydrocarbon processing industry. Its primary application is within Crude Distillation Units (CDUs)​ for:

• Preheating desalted crude oil using hot atmospheric residue.
• Heat recovery systems to reduce fuel consumption in furnaces.
• General heavy hydrocarbon service involving viscous fluids like residuum and crude oil.