Incoloy 800HT flanges are high-temperature, corrosion-resistant components made from a nickel-iron-chromium alloy that is ideal for applications involving elevated temperatures and aggressive environments. These flanges are commonly used in furnace parts, heat exchangers, hydrocarbon processing, and power plants. Manufacturers of Incoloy 800HT flanges must adhere to strict metallurgical standards to ensure dimensional accuracy, mechanical strength, and resistance to thermal stress. This article highlights the key features of Incoloy 800HT flanges and lists notable global manufacturers that supply these high-performance products.
What Are Incoloy 800HT Flanges?
Incoloy 800HT is a variation of Incoloy 800 with higher creep-rupture strength and enhanced heat resistance due to controlled carbon and aluminum + titanium content. Flanges made from this alloy can withstand temperatures up to 1100°F (593°C) and are often used in systems that operate under cyclic heating or corrosive media.
| Flange Type | Description | Common Use |
|---|---|---|
| Weld Neck Flange | Has a tapered hub and butt-welded to pipe | High-pressure, high-temperature lines |
| Slip-On Flange | Slides over pipe and welded from both sides | Low-pressure pipelines |
| Blind Flange | Used to seal pipe ends | Pressure testing and isolation |
| Socket Weld Flange | Pipe inserted into socket and fillet welded | Small-diameter, high-pressure piping |
Top Manufacturers and Suppliers of Incoloy 800HT Flanges
The following companies are known for producing and exporting high-quality Incoloy 800HT flanges in various sizes, standards, and pressure ratings:
| Manufacturer | Country | Specialization |
|---|---|---|
| NeoNickel | United Kingdom | Nickel alloys and custom flanges |
| Piyush Steel | India | ANSI/ASME/EN flanges in Incoloy 800HT |
| Rajendra Industrial | India | High-temperature forged flanges |
| Special Metals Corporation | USA | Incoloy alloy production and components |
| Ulbrich Stainless Steels | USA | Nickel alloy service center |
| Shree Steel India | India | Custom Incoloy 800HT fittings & flanges |
Standards and Grades Available
Incoloy 800HT flanges are manufactured in compliance with international standards to ensure compatibility and performance across critical systems.
| Standard | Description |
|---|---|
| ASTM B564 | Standard for forged nickel alloy flanges |
| ASME B16.5 | Pipe flanges and flanged fittings (½″ to 24″) |
| EN 1092-1 | European flange standard |
| ANSI B16.47 | Large-diameter flanges (above 24″) |
FAQs About Incoloy 800HT Flanges Manufacturers
Who are the top manufacturers of Incoloy 800HT flanges?
Leading manufacturers include NeoNickel (UK), Piyush Steel (India), Rajendra Industrial (India), and Special Metals (USA), known for certified alloy products.
Are Incoloy 800HT flanges available in different types?
Yes, they are available in weld neck, slip-on, blind, socket weld, and threaded types, suitable for various pressure and temperature applications.
What standards are followed for Incoloy 800HT flanges?
They are typically manufactured to ASTM B564, ASME B16.5, EN 1092, and ANSI B16.47 standards depending on the region and application.
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