High-temperature nickel alloy flanges are flanges made from heat-resistant nickel-based alloys. They are primarily used in environments that require resistance to high temperature, high pressure, and severe corrosion. These flanges are widely applied in high-end industries such as petrochemicals, nuclear power, aerospace, and marine engineering.

High-temperature nickel alloys (also known as heat-resistant nickel-based alloys) are materials based on nickel and alloyed with elements like chromium, iron, molybdenum, cobalt, titanium, and aluminum. 

Their main characteristics include:

Excellent high-temperature strength: Maintain good mechanical strength and oxidation resistance at elevated temperatures (up to and beyond 1000°C).

Outstanding corrosion resistance: Highly resistant to acids, alkalis, salts, and oxidizing media.

Good weldability and formability

Excellent structural stability under stress and temperature

Common grades of nickel alloys include:

Inconel 600 / 625 / 718

Hastelloy C-276 / C-22

Monel 400 / K500

Alloy 800 / 825

Chinese GH series: e.g., GH3044, GH3030, GH4169

2. Types of Nickel Alloy Flanges

Nickel alloy flanges come in various types depending on the connection method and structure:

3. Advantages of High-Temperature Nickel Alloy Flanges

Stable performance under extreme conditions

Excellent resistance to stress corrosion cracking (SCC)

Outstanding oxidation and chloride corrosion resistance at high temperatures

High structural strength and long service life

Suitable for ultra-pure environments such as semiconductors and pharmaceuticals

4. Typical Application Fields

Petrochemical: High-temp heat exchangers, column and vessel connections

Chemical processing: Acid-resistant piping connections

Aerospace: Engines and combustion systems

Nuclear energy: Reactor core and heat exchanger systems

Offshore platforms: Salt spray-resistant joints

Supercritical power plants: High-temperature steam systems