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Quotes - Engineering - Sales2205 Duplex Stainless Steel in Tube-in-Tube Heat Exchangers
2205 duplex offers an optimal balance of strength and corrosion resistance in tube-in-tube designs. The austenitic-ferritic microstructure provides twice the yield strength of 316L, exceptional resistance to chloride stress corrosion cracking, pitting, and crevice corrosion in demanding chemical, oil & gas, and process applications.
Key Applications for 2205 Duplex
- Offshore & seawater: Cooling systems handling brackish or seawater with high chloride levels.
- Chemical processing: Heat transfer in aggressive acids, chlorides, and organic solvents.
- Oil & gas: Produced water coolers, amine reboilers, and sour service streams.
- Pulp & paper: Black liquor heaters and digester liquor exchangers.
- Desalination: High-temperature brine and reject stream heat recovery.
The Benefits of 2205 Duplex in Tube-in-Tube Heat Exchangers
2205 duplex stainless steel enhances tube-in-tube exchanger performance in corrosive environments. Higher mechanical strength allows thinner walls, reducing material cost and weight while maintaining pressure integrity.
Exceptional resistance to chloride-induced stress corrosion cracking, pitting (PREN ˜35), and crevice corrosion extends service life far beyond 300-series stainless in seawater, brines, acids, and sour gas applications.
The balanced microstructure provides good weldability, toughness down to low temperatures, and resistance to sigma phase formation during fabrication. True counterflow design pairs with 2205's thermal conductivity for efficient heat transfer.
Compact, high-strength construction suits offshore platforms and space-constrained plants; longer run times reduce maintenance frequency and downtime. Lower life-cycle costs from reduced replacement and corrosion allowance needs.
Proven in seawater coolers, produced water exchangers, amine units, black liquor heaters, and desalination brine recovery — delivering reliable operation, corrosion resistance, and economic performance in aggressive services.
