HC276 American Standard Flange Ball Valve is an ultra-high-performance flow control solution designed for the most severe corrosive environments known to industry. By utilizing Hastelloy C276 (Nickel-Molybdenum-Chromium Alloy) and adhering to strict ASME/ANSI standards, this valve provides unparalleled protection against a vast array of aggressive chemical media that would rapidly destroy standard stainless steels.
Description
Hastelloy C276 (UNS N10276) is considered one of the most versatile corrosion-resistant alloys available today.
- Universal Resistance: Exceptional resistance to a wide variety of chemical process environments, including strong oxidizers like ferric and cupric chlorides, hot contaminated media, and chlorine gas.
- Pitting and SCC Defense: Outstanding resistance to localized corrosion, such as pitting and crevice corrosion, as well as stress corrosion cracking.
- Low Carbon Content: Minimizes carbide precipitation during welding, ensuring the valve maintains its corrosion resistance even in the heat-affected zones of welded joints.
Features
- ANSI/ASME Compliance: Manufactured in full accordance with ASME B16.34 (design) and ANSI B16.5 (flange dimensions), guaranteeing safety and interchangeability in international high-pressure systems.
- Exceptional Versatility: Capable of handling both oxidizing and reducing environments, making it a reliable “problem-solver” for multi-purpose chemical plants.
- Full Bore Flow: The internal diameter matches the pipeline, ensuring zero restriction to flow and maximum throughput.
- Advanced Sealing Options: Available with PTFE, TFM, or PEEK seats for chemical compatibility, or specialized metal-to-metal seating for high-temperature/abrasive chemical service.
Specifications
| Feature | Specification |
| Design Standard | ASME B16.34 / API 608 / API 6D |
| Flange Dimensions | ANSI/ASME B16.5 Class 150/300/600 |
| Face-to-Face | ASME B16.10 |
| Body Material | Hastelloy C276 / ASTM B574 (Wrought) / A494 CW12MW (Cast) |
| Pressure Class | Class 150, 300, 600 |
| Temperature Range | -196°C to 400°C (depending on seat and seal materials) |
| Testing Standard | API 598 |
Applications
- Chemical Processing: Handling wet chlorine gas, hypochlorite, and chlorine dioxide.
- Waste Treatment: Management of highly acidic or hazardous industrial waste streams.
- Pulp & Paper: Bleach plants and digesters utilizing aggressive whitening agents.
- Oil & Gas: Sour gas service ($H_2S$) and high-chloride production environments.
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