Hastelloy C276 Pipe Fittings are highly durable and corrosion-resistant fittings made from Hastelloy C276, a nickel-molybdenum-chromium superalloy. This alloy is renowned for its excellent resistance to a wide range of harsh chemicals, including strong acids and chlorine-based solutions. These fittings are extensively used in industries such as chemical processing, petrochemicals, pollution control, and power generation.

Key Features of Hastelloy C276 Pipe Fittings:

1. Material Composition: Hastelloy C276 consists of about 57% nickel, 16% molybdenum, 15.5% chromium, with small amounts of tungsten, iron, and cobalt, providing superior corrosion resistance.

2. Corrosion Resistance: The alloy offers exceptional resistance to pitting, stress corrosion cracking, and crevice corrosion. It is particularly useful in environments containing chlorides, sulfuric acid, hydrochloric acid, and other aggressive chemicals.

3. Versatility: Hastelloy C276 pipe fittings are available in multiple shapes such as elbows, tees, reducers, and flanges, making them adaptable to complex piping systems.

4. Temperature and Pressure Resistance: These fittings maintain structural integrity even at elevated temperatures and under high pressure, suitable for challenging operating conditions.

Types of Hastelloy C276 Pipe Fittings:

1. Elbows: Used to alter the direction of flow in pipelines, available in 45° and 90° angles.
2. Tees: Designed for splitting or combining flow in a pipeline.
3. Reducers: Connect pipes of varying diameters to ensure smooth flow and pressure.
4. Caps: Used to seal the ends of pipes, preventing leaks.
5. Flanges: Serve as a method for connecting pipes or valves to other components, available in multiple types (e.g., weld neck, slip-on).

Applications:

• Chemical Processing: Used in reactors, heat exchangers, and piping systems handling corrosive chemicals.
• Pollution Control: Found in scrubbers, ducts, and stacks in flue gas desulfurization (FGD) systems.
• Power Generation: Applied in systems exposed to high temperatures and corrosive conditions in the energy sector.
• Marine Applications: Effective in environments exposed to seawater and aggressive chemicals.

Mechanical Properties:

• Tensile Strength: Ranges from 100,000 to 110,000 psi (approximately 690 to 760 MPa).
• Yield Strength: Typically around 41,000 psi (283 MPa).
• Elongation: Provides good ductility with elongation up to 40%, making it easy to form and install.

Standards and Specifications:

• ASTM B366: Defines the requirements for nickel alloy fittings, including Hastelloy C276.
• ASME B16.9: Covers dimensions and pressure ratings for fittings, ensuring they meet industrial standards.

Surface Finishes:

• Natural Finish: Features a metallic luster and excellent resistance to oxidation.
• Polished Finish: Offers additional resistance to corrosion and enhances aesthetic appeal.

Sizes and Availability:

Hastelloy C276 pipe fittings are available in sizes ranging from ½ inch to 12 inches or larger, with various schedules to meet specific pressure and application requirements. Custom sizes and configurations are also available to suit project needs.

Maintenance:

• Regular Inspection: Routine checks are required to monitor wear, corrosion, and mechanical damage.
• Tightening: Fittings may need periodic re-tightening to ensure leak-proof operation.
• Replacement: Any damaged or corroded components should be replaced immediately to maintain system efficiency and safety.

Conclusion:

Hastelloy C276 Pipe Fittings are an ideal solution for industries requiring materials with high resistance to corrosive environments and excellent mechanical properties. They ensure the durability and safety of piping systems used in chemical processing, pollution control, and marine applications. By adhering to industry standards and using top-quality Hastelloy materials, these fittings deliver long-lasting performance even in the harshest conditions