Introduction
Hastelloy C22 pipe fittings are among the most trusted solutions for industries that demand exceptional corrosion resistance and strength in extreme environments. Known for their high performance in chemical processing, marine, and pollution control systems, these fittings provide long-term reliability where standard stainless steels fail.
As a leading Hastelloy C22 pipe fittings manufacturer and exporter, [Your Company Name] specializes in delivering precision-engineered fittings that meet global standards such as ASTM B366 WPHC22. With advanced manufacturing facilities and strict quality controls, we supply fittings that ensure durability, safety, and consistent performance across applications worldwide.
What is Hastelloy C22?
Hastelloy C22, also known as Alloy C22 or UNS N06022, is a nickel-chromium-molybdenum-tungsten alloy developed to resist a wide range of chemical environments. It offers superior protection against both oxidizing and reducing agents, making it ideal for highly aggressive industrial conditions.
This alloy exhibits excellent resistance to oxidizers such as ferric and cupric chlorides, hot contaminated mineral acids, acetic anhydride, and seawater. Compared with other Hastelloy grades like C276 and C4, C22 provides enhanced resistance to oxidizing chemicals and better weldability.
Standards & Designations:
- UNS: N06022
- DIN: 2.4602
- ASTM: B366 WPHC22
- ASME: SB366
Types of Hastelloy C22 Pipe Fittings
Hastelloy C22 fittings are available in a variety of configurations designed to connect, redirect, or terminate sections of piping systems. Below are the most common types supplied by [Your Company Name]:
1. Elbows (45°, 90°, 180°)
Used to change the direction of fluid flow while maintaining smooth movement and minimal pressure loss.
2. Tees and Crosses
Enable the distribution of flow into multiple directions. Ideal for complex chemical or process systems.
3. Reducers (Concentric & Eccentric)
Connect pipes of different diameters for smooth transition and steady flow.
4. Caps and Stub Ends
Seal pipe ends or act as connectors for flanged joints in piping systems.
5. Couplings, Unions, Nipples
Used for joining and easy disassembly during maintenance.
Available in Buttweld, Socket Weld, and Threaded types, each fitting ensures leak-free performance in high-temperature and high-pressure conditions.
Mechanical and Chemical Properties
Hastelloy C22’s outstanding corrosion resistance stems from its balanced chemical composition and strong mechanical properties.
Chemical Composition (%):
- Nickel (Ni): 56% min
- Chromium (Cr): 20–22.5%
- Molybdenum (Mo): 12.5–14.5%
- Tungsten (W): 2.5–3.5%
- Iron (Fe): 2–6%
- Cobalt (Co): 2.5% max
Mechanical Properties:
- Tensile Strength: 690 MPa (min)
- Yield Strength: 283 MPa (min)
- Elongation: 45%
These properties make C22 highly durable and resistant to pitting, crevice corrosion, and stress-corrosion cracking in oxidizing and reducing environments.
Manufacturing Standards & Specifications
At [Your Company Name], every fitting is manufactured in accordance with international standards such as:
- ASTM B366 / ASME SB366 – Specification for wrought nickel alloy fittings.
- ANSI B16.9 / B16.11 – Dimensions for buttweld and forged fittings.
- MSS-SP-43 – Lightweight corrosion-resistant fittings.
Each batch undergoes positive material identification (PMI), hydrostatic testing, intergranular corrosion (IGC) testing, and hardness testing to ensure integrity and performance. All products are supplied with Mill Test Certificates (EN 10204 3.1).
Key Features and Benefits
- Superior Corrosion Resistance: Performs exceptionally in oxidizing and reducing media, including chlorides and acidic solutions.
- High Strength & Durability: Maintains mechanical stability even at elevated temperatures.
- Excellent Fabricability: Easily welded and formed without compromising strength.
- Versatility: Suitable for wide industrial use—from reactors to scrubbers.
- Long Service Life: Low maintenance, high return on investment.
- Resistance to Localized Corrosion: Minimizes risk of pitting and crevice attack.
These benefits make Hastelloy C22 fittings an ideal choice for industries requiring reliability under extreme conditions.
Applications and Industries
Hastelloy C22 pipe fittings are widely used across multiple industries where corrosion resistance and mechanical stability are critical.
Major Applications Include:
- Chemical Processing: For handling aggressive acids and chemical mixtures.
- Marine & Offshore: Resists seawater corrosion and salt deposits.
- Pharmaceutical & Food Industries: Non-contaminating and hygienic.
- Pollution Control Equipment: Used in scrubbers, ducts, and exhaust systems.
- Power Generation: For heat exchangers, condensers, and boiler components.
C22’s chemical balance allows it to perform reliably in mixed acid environments, making it one of the most versatile materials for harsh industrial applications.
Dimensions, Sizes & Forms
Mcneil Instruments Inc offers Hastelloy C22 fittings in a comprehensive range of sizes and forms to suit diverse project needs:
- Size Range: ½” NB to 48” NB
- Schedules: SCH 10S to SCH 160S
- Types: Seamless, Welded, and Fabricated
- End Connections: Beveled, Plain, or Threaded
Custom sizes and special wall thicknesses are also available upon request.
Equivalent Grades & Alternatives
| Standard | Grade | Description |
|---|---|---|
| UNS | N06022 | Nickel-Chromium-Molybdenum Alloy |
| DIN | 2.4602 | Corrosion Resistant Alloy |
| EN | NiCr21Mo14W | European Equivalent |
Alternative Alloys:
- Hastelloy C276: Similar corrosion resistance but slightly less oxidizing protection.
- Inconel 625: Better strength, lower chemical resistance.
- Alloy 20: Economical alternative for mild acid conditions.
Why Choose Instruments Inc?
[Your Company Name] stands out as a trusted Hastelloy C22 pipe fittings manufacturer, supplier, and exporter due to its commitment to quality, precision, and customer satisfaction.
Our Strengths:
- Extensive Experience: Decades of expertise in nickel alloy manufacturing.
- State-of-the-Art Facility: CNC machining, forging, and finishing lines.
- Strict Quality Assurance: Each fitting undergoes multi-level inspection.
- Custom Manufacturing: Tailor-made fittings as per drawing or specification.
- Global Reach: Exporting to USA, Europe, Middle East, and Asia.
- Competitive Pricing: Cost-effective without compromising quality.
Our customers trust us for on-time delivery, reliable technical support, and consistency in every order.
Packaging, Marking & Delivery
We ensure safe and secure delivery of Hastelloy C22 fittings through robust export packaging.
- Packaging: Wooden crates, bubble wrap, and protective end caps.
- Marking: Includes grade, size, heat number, and country of origin.
- Delivery: Fast shipping via air, sea, or courier, with full tracking.
Each shipment is accompanied by complete documentation for customs clearance and traceability.
Conclusion
Hastelloy C22 pipe fittings are a proven choice for industries facing challenging chemical and environmental conditions. With exceptional corrosion resistance, high mechanical strength, and excellent weldability, they deliver unmatched reliability and long service life.
As a top Hastelloy C22 pipe fittings manufacturer and exporter, [Your Company Name] continues to set industry standards through quality, precision, and service excellence.
Contact us today for detailed specifications, pricing, or a free quotation — and experience the reliability of genuine Hastelloy C22 fittings crafted to global standards.
Frequently Asked Questions (FAQ) About Hastelloy C22 Pipe Fittings
1. What is Hastelloy C22, and why is it used for pipe fittings?
Hastelloy C22 is a nickel-chromium-molybdenum alloy with added tungsten, designed to offer outstanding resistance to oxidizing and reducing agents. It provides superior protection against pitting, crevice corrosion, and stress-corrosion cracking. These properties make it ideal for manufacturing pipe fittings used in chemical, marine, and industrial environments where corrosion resistance is critical.
2. What standards are followed for Hastelloy C22 pipe fittings?
Hastelloy C22 fittings are manufactured according to international standards, ensuring high quality and compatibility with global systems. Common standards include:
- ASTM B366 / ASME SB366 – Wrought nickel alloy fittings
- ANSI / ASME B16.9 & B16.11 – Dimensions and pressure ratings
- MSS-SP-43 – Lightweight corrosion-resistant fittings
Each fitting is also tested per EN 10204 3.1 certification requirements.
3. What are the main types of Hastelloy C22 pipe fittings available?
The most common Hastelloy C22 fittings include:
- Elbows (45°, 90°, 180°)
- Tees and Crosses
- Reducers (Concentric, Eccentric)
- Caps and Stub Ends
- Couplings and Unions
They are available in Buttweld, Socket Weld, and Threaded forms depending on installation requirements.
4. What industries commonly use Hastelloy C22 pipe fittings?
These fittings are widely used in:
- Chemical Processing Plants (acid handling systems)
- Pharmaceutical & Food Processing
- Marine & Offshore Engineering
- Pollution Control Equipment
- Power Generation and Heat Exchangers
C22 is preferred in systems where both oxidizing and reducing agents are present.
5. How does Hastelloy C22 differ from Hastelloy C276?
While both alloys are corrosion-resistant nickel-based materials, Hastelloy C22 offers better resistance to oxidizing agents and mixed acid environments compared to C276. C22 also provides improved weldability and fabricability, making it more versatile for complex piping systems.
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