Incoloy 825 U-Bend Tubes ASME SB423 for Heat Exchanger & Condenser Applic

Incoloy 825 (also known as GH825 in Chinese standards) U-bend tubes are
engineered to provide exceptional performance in heat exchanger and condenser
applications. Manufactured to the ASME SB423 standard, these nickel-chromium-
iron-molybdenum alloy tubes offer outstanding resistance to corrosion,
oxidation, and high temperatures. With their precise U-bend configuration, they
are ideally suited for use in thermal processing systems that demand
durability, reliability, and long-term performance.

Material Advantages
Superior Corrosion Resistance
Excellent chloride resistance (up to 1000ppm in seawater)

Outstanding pitting resistance equivalent number (PREN >40)

Resists stress corrosion cracking in chloride and sulfide environments

Maintains integrity in both acidic and alkaline conditions

High-Temperature Capability
Continuous service up to 1800°F (982°C)

Excellent oxidation resistance in flue gas environments

Retains mechanical strength at elevated temperatures
Key Applications
Power Generation
Steam surface condensers

Power plant cooling water systems

Geothermal energy extraction

Waste heat recovery units

Feedwater Heaters
High-pressure preheating stages

Nuclear plant secondary systems

Combined cycle power stations

Oil & Gas Processing
Crude oil heat exchangers

Gas sweetening units

LNG heat transfer systems

Refinery process coolers

Chemical Processing
Acid cooling systems

Reactor cooling loops

Polymer production equipment

Fertilizer plant condensers

Marine Applications
Seawater-cooled condensers

Offshore platform heat exchangers

Shipboard desalination units
Design Advantages
Eliminates tube-to-tubesheet joints (common failure points)

Compact footprint for space-constrained installations

Improved thermal efficiency with optimized flow paths

Reduced maintenance requirements

Manufacturing Specifications
Bend radii: 1.5x to 3x tube diameter

Wall thinning control: <15% at bend apex

Ovality control: <8% of nominal diameter

Surface finish options: Pickled, polished, electropolished

Industry Requirements
Heat Exchanger Manufacturers Demand
ASME SB423 compliance with full material certification

Precise bend geometry for proper fit-up

Consistent wall thickness throughout the bend

Cleanliness standards for critical services

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