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

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.

• 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

• Continuous service up to 1800°F (982°C)

• Excellent oxidation resistance in flue gas environments

• Retains mechanical strength at elevated temperatures

• Steam surface condensers

• Power plant cooling water systems

• Geothermal energy extraction

• Waste heat recovery units

• High-pressure preheating stages

• Nuclear plant secondary systems

• Combined cycle power stations

• Crude oil heat exchangers

• Gas sweetening units

• LNG heat transfer systems

• Refinery process coolers

• Acid cooling systems

• Reactor cooling loops

• Polymer production equipment

• Fertilizer plant condensers

• Seawater-cooled condensers

• Offshore platform heat exchangers

• Shipboard desalination units

U-Bend Configuration Benefits

• Eliminates tube-to-tubesheet joints (common failure points)

• Compact footprint for space-constrained installations

• Improved thermal efficiency with optimized flow paths

• Reduced maintenance requirements

• 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

• 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

• Long-term corrosion resistance

• Minimal fouling characteristics

• Leak-proof reliability

• Cost-effective lifecycle performance

• 100% non-destructive testing (UT, eddy current)

• Hydrostatic testing per ASME requirements

• Dimensional inspection reports

• Material traceability documentation

• Proper support spacing to prevent vibration

• Compatible gasket materials for headers

• Regular inspection for erosion/corrosion

• Chemical cleaning procedures for fouling

• 15-20 years in power plant condensers

• 10-15 years in refinery service

• 20+ years in moderate chemical applications

• ABOUT US
• About DLX ALLOY

• CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got ISO9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, Precision Alloy , FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.

• 

• About Our factory

• Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications. We also provide chemical analysis reports for every FeCrAl alloy, NiCr alloy, and other products purchased.

• For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.

• 

• Client Visits

• Building Stronger Partnerships

• 

• We support all kinds of testing:

• 

FAQ

A: Incoloy 825 is a high-performance nickel-chromium alloy known for its excellent corrosion and high-temperature resistance.

A: It consists of nickel, chromium, iron, molybdenum, and small amounts of titanium and copper.

A: It offers superior corrosion and oxidation resistance, making it ideal for harsh, high-temperature environments.

A: It is manufactured in compliance with ASME SB423 standards to ensure consistent performance.

A: Incoloy 825 U-bend tubes are used in power generation, oil and gas, chemical processing, and marine applications.