Tubular Heat Exchangers are highly suitable for high-temperature and high-pressure applications, with their structural design and material selection meeting stringent industrial requirements. Structurally, the tube bundle and shell are rigidly connected to form a closed chamber, allowing independent flow of fluids in the tube and shell sides, making them resistant to bidirectional pressure shocks. U-shaped tube bundles or floating head designs effectively relieve thermal expansion stress, preventing leakage risks caused by thermal deformation at high temperatures.
Materials can be flexibly selected based on the operating conditions: Carbon steel is suitable for general applications with temperatures ≤350°C and pressures ≤2.5 MPa; stainless steel (such as 304 and 316L) can withstand temperatures up to 600°C and highly corrosive media. For applications involving supercritical fluids or extreme pressures, specialty materials such as titanium alloys and Hastelloy ensure stable operation at pressures above 10 MPa.
In practical applications, Tubular Heat Exchangers are widely used in oil refining, coal chemical industry, and power steam systems, for example, in oil and gas cooling in catalytic cracking units and heating the main pump seal water in nuclear power plants. Its advantages are stable pressure and temperature resistance, low maintenance cost and long service life, but it is necessary to regularly inspect the corrosion of the tube bundle and control the flow rate to prevent vibration wear to ensure long-term safe operation.
