180 Degree Return Bend ASTM B366 N06022 Hastelloy C-22 For Power Generation

180 Degree Return Bend ASTM B366 N06022 Hastelloy C-22 For Heat Exchanger

A 180 Degree Return Bend made of ASTM B366 N06022 Hastelloy C-22 is a pipe fitting used in piping systems to change the direction of flow by 180 degrees. The return bend is essentially a U-shaped component that causes the fluid to reverse its direction. This type of bend is often used for reversing the direction of piping in a compact area without using multiple fittings and straight pipes.

Here’s a detailed breakdown:

1. Chemical Composition of ASTM B366 N06022 (Hastelloy C-22) (Weight %)

Notes:

• Residual elements (Cu, Al, Ti, etc.) are typically limited to trace amounts.
• The composition ensures superior corrosion resistance in oxidizing and reducing environments.

2. Mechanical Properties of ASTM B366 N06022 (Hastelloy C-22)

Additional Notes:

• Heat Treatment: Solution annealed at 2050°F (1121°C) followed by rapid cooling for optimal corrosion resistance.
• Impact Toughness: Excellent (Charpy V-notch values typically > 100 J at room temperature).
• Density: ~8.69 g/cm³
• Melting Range: ~1350-1390°C (2462-2534°F)

Key Takeaways

✔ Corrosion Resistance: Excellent in chlorides, sulfuric acid, nitric acid, and seawater.
✔ High Strength: Maintains mechanical properties at elevated temperatures.
✔ Weldability: Good, but requires proper filler metals (e.g., ERNiCrMo-10).

3. 180-Degree Return Bend

• A U-shaped pipe fitting that allows flow to double back.
• Commonly used in heat exchangers, pipelines, and process systems.

4. ASTM B366 Specification

• Covers wrought nickel-alloy fittings (butt-welding, socket-welding, threaded).
• Includes requirements for chemical composition, mechanical properties, dimensions, and testing.

5. Manufacturing & Types

• Seamless or Welded: Can be fabricated via extrusion or bending from pipe.
• Butt-Weld Ends: Typically used for high-pressure/temperature systems.
• Dimensions: Follow ASME B16.9 (for factory-made bends) or custom specifications.

6. Key Features of ASTM B366 N06022 180 Degree Return Bend

• High-Temperature Strength: Retains properties in extreme conditions.
• Weldability: Compatible with common welding techniques (TIG, MIG).
• Surface Finish: Often supplied with a smooth finish to minimize contamination.
• Superior Corrosion Resistance: Outperforms stainless steel (316L) and even Hastelloy C-276 in mixed acid environments.

Primary Applications of Hastelloy C-22 180° Return Bend

1. Chemical Processing Industry

• Acid & Chloride Environments: Used in reactors, heat exchangers, and piping systems handling:
  • Sulfuric acid, hydrochloric acid, phosphoric acid.
  • Chlorine, bleach, and other aggressive chemicals.
• Pollution Control: Scrubbers, waste gas treatment, and effluent systems.

2. Oil & Gas (Including Offshore & Subsea)

• Downhole & Wellhead Components: Resists sour gas (H₂S), CO₂, and brine corrosion.
• Refinery Piping: Used in crude oil distillation, hydroprocessing, and sulfur recovery units.

3. Power Generation

• Flue Gas Desulfurization (FGD) Systems: Handles sulfuric acid condensates and chlorides in scrubbers.
• Nuclear Waste Processing: Resists radiation-induced corrosion and acidic nuclear byproducts.

4. Pharmaceutical & Food Processing

• High-Purity Systems: Used in CIP (Clean-in-Place) systems due to non-contaminating properties.
• Sterile Processing: Resists pitting from chlorinated sanitizers (e.g., hypochlorite).

5. Marine & Offshore

• Seawater Cooling Systems: Resists crevice corrosion and biofouling in heat exchangers.
• Desalination Plants: Used in brine heaters and evaporator tubing.

6. Pulp & Paper Industry

• Bleach Plants: Withstands chlorine dioxide and other harsh bleaching agents.

Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. The factories already got certificates like : ABS, LR, DNV-GL, BV, KR, CCS, ASME, ISO 9001, ISO14001, ISO18001, ect.

Our factories main products as below :
Factory 1th: Stainless steel seamless tube, Duplex steel seamless tube, Super duplex steel seamless tube, Nickel alloy steel seamless tube;

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Factory 3th: High frequency welding fin tube(HFW fin tube, Solid Fin tube, Studded Tube, Serrated Fin tube, Longitudinal welding fin tube), Wound fin tube(L type fin tube, LL type fin tube, KL type fin tube), Embedded G type fin tube , Extruded fin tube, low fin tube, U bend & 180deg. Return;

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