Hastelloy C22 Pipe Fittings are high-performance fittings made from Hastelloy C22, a nickel-chromium-molybdenum alloy known for its outstanding resistance to corrosion and oxidation in a wide range of aggressive environments. These fittings are commonly used in industries such as chemical processing, pharmaceuticals, and wastewater treatment.

Key Features of Hastelloy C22 Pipe Fittings:

1. Material Composition: Hastelloy C22 typically contains about 56% nickel, 22% chromium, 13% molybdenum, and small amounts of tungsten and iron, providing a robust combination of strength and corrosion resistance.

2. Corrosion Resistance: Hastelloy C22 exhibits exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, making it ideal for use in environments with chlorides, acids, and other corrosive agents.

3. Versatility: Available in various shapes and sizes, including elbows, tees, reducers, caps, and flanges, allowing for flexible designs in piping systems.

4. High-Temperature Performance: These fittings maintain their mechanical properties and resistance to oxidation even at elevated temperatures, suitable for high-heat applications.

Types of Hastelloy C22 Pipe Fittings:

1. Elbows: Used to change the direction of the pipeline, available in various angles (e.g., 45°, 90°).

2. Tees: Facilitate the connection of branch lines to the main pipeline, available in equal and unequal types.

3. Reducers: Connect pipes of different diameters, ensuring smooth transitions.

4. Caps: Seal the ends of pipes to prevent flow and maintain a clean finish.

5. Flanges: Provide a means to connect pipes and equipment, available in various standards.

Applications:

• Chemical Processing: Commonly used in reactors, heat exchangers, and other equipment that handle corrosive chemicals.
• Pharmaceuticals: Employed in processes where contamination must be avoided and high purity is required.
• Wastewater Treatment: Effective in environments where exposure to corrosive substances is common.
• Marine Applications: Suitable for offshore operations due to their resistance to seawater corrosion.

Mechanical Properties:

• Tensile Strength: Typically ranges from 80,000 to 110,000 psi (approximately 550 to 760 MPa).
• Yield Strength: Generally around 30,000 to 50,000 psi (approximately 207 to 345 MPa).
• Elongation: Exhibits good ductility, often around 30% or more, allowing for ease of installation.

Standards and Specifications:

• ASTM B366: Governs the requirements for nickel alloy fittings.
• ASME/ANSI B16.9: Provides dimensions and pressure ratings for welded and seamless fittings, ensuring compatibility across systems.

Surface Finishes:

• Natural Finish: Typically has a bright, metallic surface that resists oxidation.
• Polished Finish: Offers enhanced corrosion resistance and aesthetic appeal.

Sizes and Availability:

Hastelloy C22 pipe fittings are available in various sizes, typically ranging from ½ inch to 12 inches or larger, with different schedules to accommodate varying pressure requirements. Custom sizes and configurations can also be manufactured to meet specific project needs.

Maintenance:

• Regular Inspection: Periodic checks for wear, corrosion, or leaks are essential for maintaining system integrity.
• Re-tightening: Fittings may require re-tightening to ensure leak-proof seals over time.
• Replacement: Damaged or corroded fittings should be replaced promptly to ensure safety and reliability.

Conclusion:

Hastelloy C22 Pipe Fittings are critical components in industries requiring high strength and exceptional corrosion resistance. Their versatility and reliability make them suitable for various applications, including chemical processing, pharmaceuticals, and wastewater treatment. By adhering to industry standards and utilizing high-quality materials, these fittings ensure the safe and efficient operation of piping systems in challenging environments.