ASME Section VIII Certified SA790 S32205 Duplex U-Bend Heat Exchanger Tube Bundle Sulfide Resistance

Yuhong Holdings Group Co., Ltd. is a specialized manufacturer of pressure vessels, with an annual production capacity exceeding 6,000 tons. We provide a wide range of high-quality products, including film evaporators, heat exchangers, reaction vessels, towers, storage tanks, and filters.

Advantages of SA790 S32205 Duplex U-Bend Heat Exchanger Tube Bundle

SA790 S32205 is a duplex stainless steel known for its excellent corrosion resistance and high strength, making it ideal for high-temperature and high-pressure environments. Key benefits include:

• Excellent Corrosion Resistance: Suitable for various chemical media.
• High Strength: Provides good load-bearing capacity even at thinner wall thicknesses.
• Good Weldability: Compatible with various welding processes.

SA790 S32205 Duplex U-Bend Heat Exchanger Tube Bundle Pitting Resistance Equivalent

PRE (Pitting Resistance Equivalent)​​ quantifies resistance to localized corrosion in chloride-rich environments. The formula is:
​​PRE = %Cr + 3.3 × %Mo + 16 × %N​​
For S32205 duplex steel:

PRE ≥ 22 + 3.3×3 + 16×0.14 = 33.24​​, with typical values ≥35

• ​​Chromium (Cr)​​: 22.0–23.0% (forms passive oxide layer)
• ​​Molybdenum (Mo)​​: 3.0–3.5% (enhances pitting/crevice corrosion resistance)
• ​​Nitrogen (N)​​: 0.14–0.20% (boosts strength and stabilizes austenite phase)

Heat Exchanger Component List

The SA790 S32205 U-tube is typically used in conjunction with the following components in heat exchangers:

U-Tube Specifications

Key parameters for the U-tube include:

Additional Materials

In addition to S32205, we offer various other materials for heat exchangers, including: