Hastelloy C22 Pipes Supplier & Exporter in India

Solitaire Overseas is a premier Hastelloy C22 Pipes Supplier, Manufacturer & Exporter based in Mumbai, India, serving critical industries worldwide for over 25 years. Our Hastelloy C22 Pipes conform to ASTM B622, ASTM B626 and ASME SB622 standards and are manufactured in UNS N06022 / WNR 2.4602 grade. As part of our comprehensive Hastelloy Products portfolio, we supply seamless, welded, ERW and EFW pipes in sizes from 1/8" NB to 16" NB with complete material traceability and EN 10204 Type 3.1/3.2 certification.

What is Hastelloy C22 and Why Choose It?

Hastelloy C22 (UNS N06022) is a nickel-chromium-molybdenum-tungsten alloy engineered specifically for environments where both oxidizing and reducing corrosive conditions exist simultaneously, a challenge that defeats most conventional alloys. With approximately 56% nickel, 22% chromium, 13% molybdenum, and 3% tungsten, C22 represents a significant metallurgical advancement over its predecessor Hastelloy C276, particularly in chloride-containing oxidizing environments.

The key differentiator lies in the chromium content: C22 contains 20-22.5% chromium compared to C276's ~16%, which translates to a Pitting Resistance Equivalent Number (PREN) of 65 versus C276's 52. In practical terms, this means C22 pipes can withstand chloride concentrations and temperatures that would cause pitting failure in C276 within months. For chemical processors operating bleach plants, FGD systems, or seawater-cooled heat exchangers, this extended service life often justifies the 15-20% cost premium over C276.

Another critical advantage is C22's resistance to intergranular attack in the heat-affected zone (HAZ) after welding. Unlike many nickel alloys that require post-weld heat treatment to restore corrosion resistance, C22 pipes can be welded and placed into service in the as-welded condition without sensitization concerns. This makes field fabrication and repair economically viable, particularly for large-diameter piping systems where post-weld heat treatment would be prohibitively expensive.

Industries choose Hastelloy C22 Pipes when:

• Operating temperatures exceed 150°C in chloride-containing solutions where C276 would experience crevice corrosion
• Oxidizing acids (nitric, sulfuric, chromic) are present alongside reducing species in the same process stream
• Welded joints require maximum corrosion resistance without post-weld heat treatment
• Seawater or brine contact occurs at temperatures above 60°C where most austenitic stainless steels fail
• Sour gas service (H2S) requires NACE MR0175/ISO 15156 compliance with superior pitting resistance

Our complete range includes seamless Hastelloy C22 Pipes for high-pressure applications, welded pipes for large-diameter low-pressure systems, and ERW/EFW pipes for structural and process applications. All Hastelloy pipes are supplied with full material test certificates, PMI testing reports, and third-party inspection documentation.

Table of Contents

• What is Hastelloy C22 and Why Choose It?
• Hastelloy C22 Pipe Types
• Hastelloy C22 Pipes Specification
• Alloy C22 Pipe Equivalent Grades
• Hastelloy C22 Pipes Chemical Composition
• Temperature Resistance & Operating Range
• Hastelloy C22 Pipes Mechanical & Physical Properties
• Alloy C22 Seamless Pipe Size Chart
• Alloy C22 Pipe Pressure Rating
• Tests & Certifications
• Heat Treatment
• Welding & Fabrication
• Applications
• Why Choose Solitaire Overseas
• Related Products
• Frequently Asked Questions
• Searches Related

Hastelloy C22 Pipe Types

Hastelloy C22 Seamless Pipe

Hastelloy C22 Welded Pipe

Hastelloy C22 ERW Pipe

Hastelloy C22 Pipes Specification

Alloy C22 Pipe Equivalent Grades

Hastelloy C22 Pipes Chemical Composition

Temperature Resistance & Operating Range

Hastelloy C22 Pipes maintain excellent mechanical properties and corrosion resistance across a wide temperature spectrum from cryogenic conditions to 650°C (1200°F). However, optimal performance windows vary depending on the corrosive environment:

• Oxidizing Acids (HNO3, H2SO4, CrO3): Room temperature to 150°C — superior to C276 and 316L. Above 150°C, consider C-276 or tantalum-lined steel depending on concentration.
• Reducing Acids (HCl, H3PO4): Ambient to 120°C for concentrations up to 20%. For higher concentrations or temperatures, review isocorrosion diagrams or consult our technical team.
• Chloride Solutions & Seawater: Up to 120°C with excellent pitting and crevice corrosion resistance. Critical Crevice Corrosion Temperature (CCCT) is 102°C compared to 80°C for C276 and <50°C for 316L.
• High-Temperature Service (>400°C): Strength retention remains good but consider oxidation resistance and thermal cycling effects. For continuous service above 500°C in oxidizing atmospheres, consult isocorrosion data.
• Cryogenic Service (<-100°C): Alloy C22 maintains ductility and toughness at cryogenic temperatures without embrittlement, making it suitable for LNG and liquid nitrogen piping systems.

Hastelloy C22 Pipes Mechanical & Physical Properties

Alloy C22 Seamless Pipe Size Chart (Selected Sizes)

Alloy C22 Pipe Pressure Rating (Working Pressure in psig)

Tests & Certifications for Hastelloy C22 Pipes

Solitaire Overseas provides comprehensive test reports and certification documents with every Hastelloy C22 Pipe order:

• Material Test Certificate — EN 10204 Type 3.1 & 3.2
• Chemical Analysis / Spectro Analysis (PMI Testing)
• Mechanical Testing — Tensile Strength, Yield Strength, Elongation
• Hardness Test
• Intergranular Corrosion (IGC) Test
• Micro and Macro Test
• Pitting Resistance Test
• 100% Radiography Test Report
• Flattening & Flaring Test
• Ultrasonic Testing
• Third Party Inspection Report (TPI)
• Raw Materials Certificate, QAP, Fumigation Certificate, Commercial Invoice

Heat Treatment of Hastelloy C22 Pipes

Welding & Fabrication of Hastelloy C22 Pipes

Hastelloy C22 offers excellent weldability and is commonly used as a weld filler material to improve corrosion resistance of weld zones. The alloy's balanced composition minimizes sensitization and intergranular corrosion in heat-affected zones.

Surface Preparation: Remove all oil, grease, marking inks, and oxide scale within 25mm of the weld zone using stainless steel wire brushes or solvent cleaning. Unlike carbon steel, nickel alloys do not tolerate contaminants even fingerprints can cause porosity.

Joint Preparation: Use V or U-groove joint geometry with 60-75° included angle. Maintain 1.5-2mm root gap for pipes <3" NB, 2-3mm for larger sizes. Machine or grind joint faces smooth — torch cutting leaves a carbon-rich layer that must be ground off.

Backing Gas: Argon purge at 10-15 SCFH is mandatory for the root pass to prevent oxidation and porosity. Maintain purge until weld cools below 200°C. For orbital welding, purge the entire pipe segment with oxygen levels <50 ppm measured with an oxygen analyzer.

Welding Parameters (GTAW/TIG): 80-120A for 1/8" wall, 140-180A for 1/4" wall. Travel speed 8-12 IPM. Use DCEN (straight polarity). Filler wire AWS A5.14 ERNiCrMo-10 (alloy 22 filler) — do not substitute C276 filler as it reduces weld metal corrosion resistance.

Interpass Temperature: Keep below 150°C (300°F). High interpass temps increase carbide precipitation risk and reduce toughness. Allow cooling between passes on thick-wall pipe.

Post-Weld Treatment: Solution annealing is optional but recommended for maximum corrosion resistance in severe service. Heat to 1120°C (2050°F), hold 2-5 minutes (thin wall) or 10-15 minutes (thick wall), then water quench or rapid air cool. For field-welded piping where PWHT is impractical, the as-welded condition provides acceptable corrosion resistance in most C22 applications.

Applications of Hastelloy C22 Pipes

Alloy C22 Pipes from Solitaire Overseas are trusted across demanding industries due to their superior corrosion resistance and mechanical strength:

• Chemical Processing: Reactors, heat exchangers, scrubbers, vessels in HCl & H2SO4 environments
• Pharmaceutical: High-purity process piping, CIP/SIP systems
• Oil & Gas: Offshore pipelines, sour gas service (NACE MR0175 / ISO 15156)
• Paper & Pulp: Bleach plant piping, digesters, rotary drum washers
• Power Generation: FGD systems, waste incineration, heat exchangers
• Food Processing: Sanitary piping systems, food-grade process lines
• Marine / Offshore: Seawater handling, ballast systems, subsea components
• Waste Treatment: Acid waste neutralization, flue gas desulfurization

Why Choose Solitaire Overseas for Hastelloy C22 Pipes?

• Certified Manufacturer: EN 10204 Type 3.1 & 3.2 MTC with every order
• Global Exporter: Supply to 50+ countries including UAE, Saudi Arabia, USA, UK, Germany, Singapore, Australia
• Wide Stock: Seamless and welded C22 pipes in stock for immediate dispatch from Mumbai
• Custom Orders: Sizes up to OD 600mm, wall thickness 2.5-100mm, cut-to-length available
• Competitive Pricing: Best-in-market rates for Alloy C22 Seamless Pipe and welded variants
• Quality Assurance: Full suite of NDT and destructive tests; PMI testing on every heat
• Fast Delivery: Ex-stock delivery; custom lead times for large diameter and thick wall pipes
• Traceability: Complete material traceability from raw material to finished pipe

Related Products

• Hastelloy Products
• Hastelloy Pipes
• Hastelloy C276 Pipes
• Hastelloy B2 Pipes

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