Hastelloy C22 (UNS N06022) pipe for chemical industry is an upgraded nickel-chromium-molybdenum-tungsten superalloy pipe, engineered to deliver superior corrosion resistance in oxidizing and mixed-acid environments where Hastelloy C276 shows limitations. Specially formulated for the most aggressive chemical processing conditions, it provides unmatched durability in high-temperature wet chlorine, nitric acid mixtures and oxidizing chloride solutions.
As the premium corrosion-resistant alloy pipe for severe oxidizing chemical service, Hastelloy C22 exhibits exceptional resistance to sensitization and intergranular corrosion after welding, requiring no post-weld heat treatment. With over 20 years of production experience, Emily PIPE supplies precision-manufactured Hastelloy C22 seamless and welded pipes that meet the strictest international chemical industry standards.
| Item | Details |
|---|---|
| Executive Standards | 1. International Material Standards: ASTM B622 (Seamless Pipe), ASTM B619 (Welded Pipe), ASTM B626 (Welded Tube), ASME SB622, ASME SB619, ASME SB626
2. Chemical Piping Standards: ASME B31.3 (Process Piping), ASME B31.4 3. Pressure Vessel Standards: ASME Section VIII Div.1, PED 2014/68/EU 4. Testing Standards: ASTM E8, ASTM E23, ASTM E10, ASTM G48, ASTM E243 (Eddy Current) 5. Quality Management Standards: ISO 9001, ISO 14001, OHSAS 18001 |
| Material Grade | 1. Main Grade: Hastelloy C22 (Ni-Cr-Mo-W Superalloy, Severe Oxidizing Chemical Grade)
2. International Designations: UNS N06022, W.Nr.2.4602, Alloy C22, NiCr21Mo14W 3. Equivalent Grades: NS3308 (China), Hastelloy C22 (USA), Nicrofer 5621 (Germany) 4. Special Grades: Seamless grade for high-pressure applications; ultra-low sulfur grade for maximum weldability; high-purity grade for semiconductor industry |
| Chemical Composition (Weight %) | 1. Nickel (Ni): Balance (base element for overall corrosion resistance)
2. Chromium (Cr): 20.0-22.5 (primary element for oxidizing acid resistance) 3. Molybdenum (Mo): 12.5-14.5 (for reducing acid and pitting resistance) 4. Tungsten (W): 2.5-3.5 (enhances crevice corrosion resistance) 5. Iron (Fe): 2.0-6.0 (improves formability and cost-effectiveness) 6. Cobalt (Co): ≤2.5 7. Carbon (C): ≤0.015 (ultra-low content prevents intergranular corrosion) 8. Silicon (Si): ≤0.08 9. Manganese (Mn): ≤0.50 10. Phosphorus (P): ≤0.020 11. Sulfur (S): ≤0.010 |
| Mechanical Properties (Annealed State) | 1. Tensile Strength (RT): 690-930 MPa
2. 0.2% Yield Strength (RT): ≥310 MPa 3. Elongation (δ5): ≥40% (excellent formability for bending/forming) 4. Reduction of Area: ≥50% 5. Hardness (HB): 180-235 6. Tensile Strength (200℃): ≥590 MPa 7. Tensile Strength (400℃): ≥490 MPa 8. Modulus of Elasticity: 206 GPa 9. Thermal Expansion: 11.1×10⁻⁶/℃ (20-100℃) 10. Maximum Continuous Service Temperature: 650℃ |
| Dimensional Tolerance | 1. Seamless Pipes: Ø6-50mm ±0.15mm; Ø50-150mm ±0.3mm; Ø150-300mm ±0.5mm; Wall thickness ±0.08-0.12mm
2. Welded Pipes: Ø10-200mm ±0.2mm; Wall thickness ±0.10mm 3. U-Bend Pipes: Bend radius ±0.5mm; Ovality at bend ≤3% of OD 4. Length Tolerance: ±2mm (1-12m); custom lengths up to 18m available |
| Why This Material Is Used in Chemical Industry | 1. Superior Oxidizing Environment Resistance:
– Outperforms Hastelloy C276 in high-temperature wet chlorine, nitric acid and hypochlorite solutions, the only commercial alloy suitable for continuous service in 120℃ wet chlorine – Excellent resistance to nitric acid (up to 65% concentration at boiling point) and nitric-hydrofluoric acid mixtures, critical for metal pickling and semiconductor manufacturing – Forms a stable chromium-rich oxide layer that resists breakdown in strong oxidizing environments 2. Exceptional Anti-Sensitization Performance: – Resists carbide precipitation and intergranular corrosion even after prolonged exposure to 600-900℃, eliminating the risk of weld decay – Ideal for piping systems that experience thermal cycling or operate in the sensitization temperature range – Retains full corrosion resistance after welding without post-weld heat treatment, reducing fabrication costs by 30-40% 3. Unmatched Mixed Acid Corrosion Resistance: – The only alloy that withstands the combined attack of oxidizing and reducing acids, making it suitable for multi-chemical process environments – Excellent resistance to sulfuric acid-nitric acid mixtures, hydrochloric acid-nitric acid mixtures and other complex acid solutions – Superior resistance to oxidizing chloride solutions, including ferric chloride and cupric chloride 4. Enhanced Localized Corrosion Resistance: – Higher PREN value (45) than Hastelloy C276 (42), providing better pitting and crevice corrosion resistance – Resists crevice corrosion in chloride solutions up to 120℃, 20℃ higher than C276 – Immune to stress corrosion cracking in chloride-containing environments 5. Proven Long-Term Reliability: – Over 40 years of proven performance in the most severe oxidizing chemical applications – Service life 2-3 times longer than C276 in oxidizing environments, significantly reducing maintenance costs – Extensively tested and qualified by all major global chemical and pharmaceutical companies |
| Application Scenarios and Corresponding Customers | 1. Chlor-Alkali and Chlorine Processing Industry:
– Applications: Chlorine gas piping, brine heater tubes, hypochlorite production lines, electrolyzer piping, acid transfer lines and heat exchanger tubes – Customers: Dow Chemical, Olin Corporation, Westlake Chemical, Shin-Etsu Chemical, Solvay, BASF 2. Nitric Acid and Mixed Acid Industry: – Applications: Nitric acid production piping, acid pickling lines, metal finishing piping, heat exchanger tubes, condenser tubes and process piping – Customers: DuPont, BASF, Bayer, Linde, Air Liquide, Sinopec 3. Semiconductor Manufacturing Industry: – Applications: High-purity chemical delivery systems, wet bench piping, etching equipment piping, ultra-pure water systems and process gas lines – Customers: Intel, TSMC, Samsung Electronics, Applied Materials, Lam Research 4. Pharmaceutical and Fine Chemical Industry: – Applications: Reactor piping, heat exchanger tubes, solvent transfer lines, acid and base handling systems and clean process piping – Customers: Pfizer, Novartis, Merck, Roche, Johnson & Johnson, AstraZeneca 5. Petrochemical and Refining Industry: – Applications: Hydrocracking unit piping, sour gas processing lines, acid gas removal systems, heat exchanger tubes and process piping – Customers: ExxonMobil, Shell, BP, Chevron, TotalEnergies, Saudi Aramco 6. Environmental Protection Industry: – Applications: Flue gas desulfurization systems, waste incineration piping, scrubber piping, wastewater treatment lines and stack liners – Customers: Siemens Energy, GE Power, Mitsubishi Heavy Industries, DuPont Water Solutions |
| Customer Requirements in This Industry | 1. Performance Requirements:
– Oxidizing Acid Resistance: Must resist corrosion from nitric acid, hypochlorite and wet chlorine at elevated temperatures – Mixed Acid Resistance: Must withstand combined attack of oxidizing and reducing acid mixtures – Anti-Sensitization Performance: Must resist intergranular corrosion after welding and thermal cycling – Localized Corrosion Resistance: Must be immune to pitting, crevice corrosion and stress corrosion cracking – Pressure Resistance: Must withstand operating pressures up to 160 bar in high-pressure chemical processes 2. Quality and Compliance Requirements: – Material Standard Compliance: Must meet all requirements of ASTM B622, ASTM B619 and ASME SB622 – ASME B31.3 Compliance: Must comply with process piping code for chemical plant construction – Full Traceability: Must provide 100% traceability from raw material ore to finished product – Material Certification: Must provide comprehensive MTRs including chemical analysis and NDT results – Third-Party Inspection: Must allow inspection by TÜV, SGS, BV or other authorized organizations 3. Manufacturing Requirements: – Precision Dimensional Tolerances: Must meet tight tolerances for proper fit and assembly of piping systems – Surface Quality: Must have a smooth, defect-free surface to prevent corrosion initiation and ensure proper sealing – Internal Quality: Must be free from inclusions, porosity and segregation (100% UT/ET verified) – Consistent Quality: Must have uniform chemical composition across all batches – Cleanliness Requirements: Must meet strict cleanliness standards, especially for semiconductor and pharmaceutical applications 4. Supply Chain Requirements: – Reliable Delivery: Must meet tight project schedules and plant turnaround deadlines – Emergency Response: Must provide expedited production for unplanned shutdowns – Small Batch Capability: Must produce small quantities for prototype development and maintenance – Global Supply Capability: Must deliver to chemical plants worldwide with consistent quality – Inventory Management: Must offer stock holding solutions to reduce customer inventory costs 5. Cost Requirements: – Competitive Pricing: Must offer fair pricing while maintaining the highest quality standards – Low Total Cost of Ownership: Must provide long service life and reduced maintenance costs – Value-Added Services: Must offer cutting, bending, welding and end processing services |
| Common Related Products in This Industry | 1. Hastelloy C22 Seamless Pipes: Available in various sizes and wall thicknesses for high-pressure chemical applications
2. Hastelloy C22 Welded Pipes: Cost-effective solution for large-diameter and low-to-medium pressure applications 3. Hastelloy C22 U-Bend Pipes: Custom bent pipes for chemical heat exchangers and condensers 4. Hastelloy C22 Fittings: Elbows, tees, reducers, flanges and couplings for chemical piping systems 5. Hastelloy C22 Forgings: Custom forgings including valve bodies, pump casings and flanges 6. Hastelloy C22 Fasteners: Bolts, nuts, screws, studs and washers for severe corrosion service 7. Hastelloy C22 Welding Materials: Electrodes, wires and filler metals for chemical industry welding 8. Hastelloy C22 Machined Components: Precision-machined valves, fittings and heat exchanger parts 9. Hastelloy C22 Sheets and Plates: Used for manufacturing tanks, vessels and heat exchangers 10. Custom Fabricated Assemblies: Pre-fabricated piping spools and heat exchanger bundles |
| Why Choose Us (Emily PIPE) | 1. 20+ Years of Chemical Alloy Expertise: We have been supplying high-performance Hastelloy C22 pipe products to the global chemical industry for over 20 years
2. Dedicated Chemical Grade Production Line: We operate a dedicated clean production line for Hastelloy C22 pipes, ensuring strict control over chemical composition 3. Full-Process Quality Control: We implement comprehensive quality control including 100% ultrasonic, eddy current and hydrostatic testing 4. Complete International Certifications: Our products meet all major international standards and hold ASTM, ASME, PED and ISO 9001 certifications 5. Advanced Customization Capability: We can produce custom sizes, lengths, wall thicknesses and end processing according to your drawings 6. Global Chemical Supply Chain Experience: We have extensive experience supplying to major chemical companies worldwide with reliable on-time delivery 7. Professional Technical Support: Our team of metallurgical engineers and corrosion specialists provides expert guidance on material selection 8. One-Stop Solution: We provide complete solutions from raw material supply to pre-fabricated piping assemblies, reducing your supply chain complexity |
| Supplementary Industry Information | 1. Comprehensive Test Reports: Each batch comes with a full MTR including chemical analysis, mechanical properties and NDT results. Corrosion test reports available upon request
2. Full Material Traceability: Every pipe has a unique heat number and complete traceability documentation from raw material to finished product 3. Value-Added Processing: We offer precision cutting, CNC bending, welding, end processing and surface finishing services 4. Prototype Development Support: We support small batch prototype orders with fast turnaround times 5. Emergency Response Service: We provide 24/7 emergency service for unplanned plant shutdowns with expedited shipping 6. Market Growth: The global Hastelloy C22 pipe market is projected to grow at a CAGR of over 7% through 2030, driven by semiconductor and pharmaceutical industry demand 7. Sustainability Commitment: All our products are manufactured using sustainable practices and are 100% recyclable |
| Packaging | 1. Plastic Caps: All pipe ends are protected with heavy-duty polyethylene caps with internal sealing rings to prevent contamination
2. Waterproof Film: Each pipe is individually wrapped in waterproof and anti-corrosion film 3. Bundle Packing: Pipes of the same size are bundled with steel straps and wooden spacers to prevent contact damage 4. Wooden Case: Bundles are packed in sturdy fumigated wooden cases with steel reinforcement for international shipping 5. Export Standard Packing: All packaging complies with international export standards and ISPM 15 regulations 6. Marking: Each package is clearly marked with product specifications, heat number, quantity and destination |
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