ASTM B622 UNS N06022 Hastelloy C22 Tubing for Marine and Petrochemical Use

In industries where materials face constant attack from corrosive chemicals, seawater, and extreme temperatures, the choice of tubing becomes one of the most critical engineering decisions. ASTM B622 UNS N06022 Hastelloy C22 Tubing is a high-performance solution designed to thrive in such harsh conditions. At DLX, we manufacture and supply this alloy tubing to global clients who demand reliability, durability, and compliance with the most rigorous standards.

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Hastelloy C22, also known as UNS N06022, is a nickel-based alloy that incorporates chromium, molybdenum, and tungsten to provide exceptional resistance against a broad range of chemical environments. Unlike many alloys that are effective in either oxidizing or reducing conditions, Hastelloy C22 resists both, making it uniquely versatile.

ASTM B622 defines the manufacturing standards for seamless tubing made from nickel-based alloys like Hastelloy C22. Seamless tubes have no welded seams, which eliminates weak points and ensures better structural integrity. This makes them suitable for high-pressure and high-temperature applications where reliability is critical.

At DLX, our Hastelloy C22 Tubing is manufactured under tight quality controls to meet the exact requirements of marine and petrochemical industries, among others.

Specification

item	HC-276	C-22	C-4	B2	B3	N
C	≤0.01	≤0.015	≤0.015	≤0.02	≤0.01	0.04-0.08
Mn	≤1	≤0.5	≤1	≤1	≤3	≤1
Fe	4-7	2-6	≤3	≤2	≤1.5	≤5
P	≤0.04	≤0.02	≤0.04	≤0.04	--	≤0.015
S	≤0.03	≤0.02	≤0.03	≤0.03	--	≤0.02
Si	≤0.08	≤0.08	≤0.08	≤0.1	≤0.1	≤1
Ni	rest	rest	rest	rest	≤65	rest
Co	≤2.5	≤2.5	≤2	≤1	≤3	≤0.2
Ti+Cu	--	--	≤0.7	--	≤0.4	≤0.35
Al+Ti	--	--	--	--	≤0.5	≤0.5
Cr	14.5-16.5	20-22.5	14-18	≤1	≤1.5	6-8
Mo	15-17	12.5-14.5	14-17	26-30	≤28.5	15-18
B	--	--	--	--	--	≤0.01
W	3-4.5	2.5-3.5	--	--	≤3	≤0.5
V	≤0.35	≤0.35	--	0.2-0.4	--	≤0.5

Shape	Size (mm)
Wire	0.5-7.5
Rod/Bar	8.0-200
Strip	(0.5-2.5)*(5-180)
Tube/Pipe	Custom made
Sheet/Plate	Custom made

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The versatility of ASTM B622 UNS N06022 Hastelloy C22 Tubing makes it a preferred choice across multiple sectors:

• Marine Engineering: In offshore platforms, shipbuilding, and desalination plants, tubing is continuously exposed to seawater. Hastelloy C22 resists pitting, crevice corrosion, and stress corrosion cracking better than most materials.

• Petrochemical Industry: Refining and chemical processing plants handle complex chemical streams containing oxidizers, reducers, and chlorides. C22 tubing ensures safety and durability in these environments.

• Chemical Processing: Reactors, heat exchangers, and transfer lines benefit from the alloy’s resistance to oxidizers like nitric acid and chlorides, as well as reducers such as hydrochloric acid.

• Pharmaceuticals: Ensures contamination-free performance in systems requiring sterilization and exposure to strong cleaning agents.

• Pollution Control: Utilized in scrubbers, waste treatment facilities, and flue gas handling systems where aggressive conditions prevail.

• Power Generation: Applied in condensers, scrubbers, and environmental systems that manage hot, contaminated gases.

By supplying customized tubing dimensions, DLX ensures that each project receives an optimal solution.

The global market for nickel alloys continues to expand, with Hastelloy C22 Tubing gaining prominence due to its unique resistance profile. Several key factors drive demand:

1. Expansion of Marine and Offshore Projects: As the world invests in offshore energy and desalination plants, materials that resist seawater corrosion are essential.

2. Petrochemical Growth: With energy demand rising globally, petrochemical facilities require reliable tubing capable of handling aggressive chemical environments.

3. Chemical Processing Evolution: Modern plants use more complex chemical mixtures, requiring materials with broad-spectrum corrosion resistance.

4. Environmental Regulations: Stricter global laws on emissions and waste handling push industries toward materials that provide long-term durability in aggressive conditions.

5. Pharmaceutical Industry Expansion: The need for high-purity, corrosion-resistant tubing in drug manufacturing continues to grow.

These trends position Hastelloy C22 Tubing as a key material for the future, with DLX ensuring its availability and reliability.

Comparison Table: Hastelloy C22 Tubing vs Alternatives

At DLX, we don’t just supply tubing—we deliver complete solutions. Our customers rely on us for more than just alloy performance. We bring:

• Strict Compliance: Every tube is manufactured in accordance with ASTM B622 and international quality standards.

• Customization Options: We supply tubing in varied diameters, wall thicknesses, and lengths, tailored to unique project needs.

• Rigorous Quality Testing: Each batch undergoes chemical composition checks, mechanical testing, and corrosion resistance validation.

• Expert Guidance: Our team supports clients with welding, machining, and installation advice for Hastelloy C22 Tubing.

• Reliable Global Logistics: With streamlined supply chains, DLX ensures on-time delivery worldwide.

• Balanced Value: We provide premium products at competitive pricing, maximizing project efficiency.

This focus on quality, service, and customer satisfaction makes DLX a trusted partner in marine and petrochemical industries worldwide.

When choosing between stainless steel, Hastelloy C276, and Hastelloy C22, the differences are significant. Stainless steel 316L may be cost-effective but often fails in chloride-rich conditions. Hastelloy C276 performs excellently but is less effective in certain mixed chemical media. Hastelloy C22 provides a broader range of resistance, offering security against both oxidizers and reducers.

By supplying seamless tubing, DLX ensures clients receive products with superior mechanical integrity and performance reliability.

The demand for ASTM B622 UNS N06022 Hastelloy C22 Tubing will continue to rise as industries face harsher conditions and stricter requirements. Key drivers include:

• Growing offshore oil and gas projects.

• Increasing chemical and petrochemical plant expansions.

• Rising global desalination needs.

• Expansion of pollution control and environmental protection equipment.

• Healthcare and pharmaceutical sector growth.

DLX is well-positioned to meet this demand, leveraging expertise, advanced production, and a strong global distribution network.

Conclusion

ASTM B622 UNS N06022 Hastelloy C22 Tubing is more than just a material choice—it is an assurance of performance in the harshest environments. Its unmatched ability to resist oxidizers, reducers, and chloride-rich conditions makes it a preferred material across marine, petrochemical, and chemical industries.

At DLX, we are committed to supplying this high-performance tubing with precision, reliability, and global reach. By focusing on strict standards, advanced testing, and customer-centric service, we help industries achieve efficiency, safety, and durability in their most critical operations.

As global challenges intensify, DLX remains a dependable partner for ASTM B622 UNS N06022 Hastelloy C22 Tubing, ensuring long-term success for clients in marine and petrochemical industries.

For more details, pls directly contact us.

About Us:

Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications.

For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.

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FAQs:

Q1: What is ASTM B622 UNS N06022 Hastelloy C22 Tubing?
A1: It is a nickel-chromium-molybdenum alloy seamless tubing manufactured under ASTM B622 standards, offering superior corrosion resistance.

Q2: What industries commonly use Hastelloy C22 Tubing?
A2: Industries such as marine engineering, petrochemicals, pharmaceuticals, chemical processing, and pollution control rely on it.

Q3: How does Hastelloy C22 perform in marine environments?
A3: It provides excellent resistance to seawater-induced pitting, crevice corrosion, and stress corrosion cracking.

Q4: Can Hastelloy C22 Tubing withstand oxidizing agents?
A4: Yes, it resists oxidizers like chlorine, nitric acid, and ferric ions effectively.

Q5: Is Hastelloy C22 resistant to reducing environments?
A5: Yes, it resists hydrochloric acid, sulfuric acid, and other reducing chemicals.

Q6: What is the temperature range for ASTM B622 UNS N06022 Hastelloy C22 Tubing?
A6: It performs well up to around 1000°C depending on the service environment.

Q7: What forms of Hastelloy C22 Tubing are available from DLX?
A7: DLX supplies seamless tubing in multiple sizes and customized dimensions for project-specific needs.

Q8: Why choose DLX as a supplier of Hastelloy C22 Tubing?
A8: DLX offers strict ASTM compliance, precise production, advanced testing, and reliable global delivery.