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CST Heat Exchanger, a trusted provider of industrial thermal solutions, ODM Stainless Steel Tube Aluminum Fin Heat Exchanger tailored for corrosive gas environments—a robust, high-efficiency thermal transfer unit engineered to withstand harsh chemical-laden gases while delivering reliable heat recovery and cooling performance. Designed for ODM customization, it meets unique dimensional, pressure, and anti-corrosion requirements across chemical, pharmaceutical, waste incineration, and offshore industries.
Core Construction: Anti-Corrosion Bimetallic Design
At its core, the exchanger combines corrosion-resistant stainless steel tubes with high-thermal-conductivity aluminum fins, optimized for corrosive gas streams (e.g., acid flue gas, chlorine-containing gas, sulfide gas).
Stainless Steel Tubes (304/316L): Seamless austenitic stainless steel tubes (ASTM A312 standard) serve as the fluid channel, offering exceptional resistance to oxidation, sulfidation, and chlorine-induced corrosion. 316L grade withstands highly corrosive media, ideal for flue gas from chemical processes or waste incineration.
Epoxy-Coated Aluminum Fins: High-purity aluminum fins (thermal conductivity ~237 W/m·K) are coated with industrial epoxy to resist moisture, salt spray, and mild acid/base gases. The coating prevents galvanic corrosion between dissimilar metals and extends service life by 3–5 times in C3–C4 corrosive environments.
Advanced Bonding Technology: Fins are mechanically extruded or high-frequency welded to tubes, eliminating contact thermal resistance and ensuring structural integrity under thermal cycling and high gas velocity.
Heavy-Duty Frame: Stainless steel or galvanized steel frame with epoxy powder coating provides structural rigidity and additional corrosion protection for outdoor/industrial installation.
Key Features for Corrosive Gas Applications
Superior Corrosion Resistance: Stainless steel tubes handle corrosive gas internally, while epoxy-coated aluminum fins resist external fouling and corrosion—suitable for acid, alkali, salt-laden, and high-humidity gas streams.
High Thermal Efficiency: Aluminum fins maximize heat transfer area (3–5× that of bare tubes) and induce turbulent airflow, achieving 70–85% heat recovery efficiency for corrosive gas cooling/heating.
Full ODM Customization: Tailor-made solutions for specific requirements:
Tube OD: 8–25 mm; Fin pitch: 2.0–6.0 mm
Core size: 300×300 mm to 1500×3000 mm
Working pressure: Up to 3.0 MPa; Temperature range: -40°C to +600°C
Fin patterns: Wave, louvered, or custom designs
Low Maintenance & Long Lifespan: Smooth epoxy surface resists dust and fouling; easy to clean with water or mild detergent. No moving parts, reducing downtime and replacement costs—service life exceeds 15 years in corrosive conditions.
Cost-Effective Performance: Balances stainless steel’s corrosion resistance with aluminum’s low cost and high conductivity—more affordable than full stainless steel exchangers while outperforming copper-aluminum units in corrosive environments.
Ideal Applications
Chemical Industry: Cooling/condensing acid flue gas, chlorine gas, and sulfide gas
Waste Incineration: Heat recovery from corrosive exhaust gas
Pharmaceutical & Biotechnology: Ventilation with corrosive process fumes
Offshore & Coastal Facilities: Salt-laden air cooling for oil/gas platforms
Metallurgical Industry: High-temperature corrosive flue gas treatment
