ASME SA789 Duplex 2205 / UNS S32205 Stainless Steel U Bend Tube for Heat Exchanger
A U-bend tube is a tube that is bent into a U shape to facilitate heat exchange processes. They are commonly used in heat exchangers, condensers, and other thermal management systems. They can be designed and manufactured to precise specifications, ensuring suitability for application in various installations.Duplex UNS S32205 exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, which makes it suitable for applications in environments that are rich in chlorides or fluctuating temperatures.
Equivalent Grade of S32205 Duplex Steel Tubing
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS |
| BS | En | No | Name |
| 2205 | S31803 / S32205 | 318S13 | - | 1.4462 | X2CrNiMoN22-5-3 | 2377 | SUS 329J3L |
ASTM A789/ASME AS789 Duplex Steel Tubing Chemical Requirements
| UNS | C | Mn | P | S | Si | Ni | Cr | Mo | N | Cu | Other |
| S31803 | 0.03 | 2 | 0.03 | 0.02 | 1 | 4.5-6.5 | 21-23 | 2.5-3.5 | 0.08-0.2 | ... | ... |
| S32205 | 0.3 | 2 | 0.3 | 0.2 | 1 | 4.5-6.5 | 22-23 | 3-3.5 | 0.14-0.2 | ... | ... |
| S32750 | 0.03 | 1.2 | 0.035 | 0.02 | 0.8 | 6-8 | 24-26 | 3-5 | 0.24-0.32 | 0.5 | ... |
| S32760 | 0.3 | 1 | 0.03 | 0.01 | 1 | 6-8 | 24-26 | 3-4 | 0.2-0.3 | 0.15-1 | W 0.5-1 |
Good Properties of S32205 Duplex Steel Tubing
- Corrosion Resistance: S32205 exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, which makes it suitable for applications in environments that are rich in chlorides or fluctuating temperatures.
- Mechanical Strength: Duplex stainless steels like S32205 provide higher strength and toughness compared to standard austenitic stainless steels. This translates to enhanced performance in high-pressure and high-temperature applications.
- Weldability: A789 S32205 can be welded using various methods (e.g., TIG, MIG) while maintaining its integrity, though it requires careful control of heat input to avoid welding-related issues.
Advantages of Using A789 S32205 U-Bend Tubes
- Longevity: High resistance to corrosion and wear leads to a longer lifespan, reducing maintenance costs.
- Efficiency: Improved heat transfer properties enhance operational efficiency in thermal applications.
- Strength: Higher mechanical properties mean they can withstand greater pressures and temperatures, critical in harsh environments.
Applications
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Chemical Processing:
- S32205 is resistant to pitting, crevice corrosion, and stress corrosion cracking, making it ideal for heat exchangers used in chemical processing where corrosive substances are present.
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Oil and Gas Industry:
- U-bend tubes made from S32205 are commonly used in offshore and onshore facilities for heat exchangers, stabilizing the temperature of fluids used in drilling and production processes.
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Power Generation:
- In power plants, S32205 U-bend tubes are utilized in heat exchangers to efficiently transfer heat from one fluid to another, often used in waste heat recovery and steam generation.
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Marine Applications:
- The steel's excellent resistance to seawater corrosion allows it to be used in marine heat exchangers, where exposure to saltwater is a concern.
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Food and Beverage Industry:
- S32205 is used in food processing equipment, especially where heat exchange is necessary. Its corrosion resistance ensures the safety and quality of food products.
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HVAC Systems:
- In heating, ventilation, and air conditioning systems, duplex stainless steel U-bend tubes help efficiently manage thermal exchange processes, ensuring effective temperature control.
- Heat Exchanger, Boiler
