Hastelloy C22 Tube
Alloy C22 Welded and Seamless Tubes for Oxidizing Chloride Media, Chemical Processing and Corrosion-Resistant Heat Exchangers
GAOFA TECH supplies Hastelloy C22 / Alloy C-22 welded and seamless tubes for oxidizing chloride media review, chemical processing equipment, corrosive heat exchangers, acid service, pitting and crevice corrosion review, stress corrosion cracking review, scrubber equipment and selected chloride-containing chemical environments.
Alloy C22 tube selection should be reviewed according to working medium, chloride level, oxidizing or reducing condition, acid concentration, temperature, pressure, impurities, tube form, fabrication process, inspection requirement and customer specification.
Hastelloy C22 Tube Supply Scope
This page is designed for buyers searching for Hastelloy C22 tube, Hastelloy C-22 tube, Alloy C22 tube, UNS N06022 tube, 2.4602 tube, Hastelloy C22 welded tube, Hastelloy C22 seamless tube, ASTM B622 C22 tube, ASTM B626 C22 welded tube, C22 heat exchanger tube, C22 chemical processing tube and oxidizing chloride corrosion-resistant nickel alloy tube.
Both welded and seamless Hastelloy C22 tube directions can be reviewed according to standard, size and application.
Nickel-chromium-molybdenum-tungsten alloy direction for oxidizing chloride media and chemical processing service.
Often reviewed where localized corrosion and stress corrosion cracking risks need careful material selection.
Review C22 when oxidizing chloride media or customer specifications point toward UNS N06022.
What Is Hastelloy C22 Tube?
Hastelloy C22 tube, also described as Alloy C-22 tube, Alloy 22 tube, UNS N06022 tube or 2.4602 tube, is a nickel-chromium-molybdenum-tungsten alloy tube used where oxidizing chloride media, mixed chemical streams, pitting corrosion, crevice corrosion and stress corrosion cracking risks need to be reviewed carefully.
Alloy C22 tubes are commonly reviewed for chemical processing equipment, corrosive heat exchangers, reactors, columns, scrubbers, acid service, chloride-containing process media and selected environments where both oxidizing and reducing corrosion conditions may be present.
GAOFA TECH supplies Hastelloy C22 welded and seamless tube directions. The correct tube form, standard, size, heat treatment, inspection and packing requirement should be confirmed according to the working condition and customer specification.
What Buyers Should Confirm Before Selecting C22 Tube
Hastelloy C22 tube should not be selected only by alloy name. The key question is whether UNS N06022 matches the actual chloride, oxidizing / reducing, acid, temperature and fabrication conditions.
- Working medium, acid type, concentration, pH, chloride level and impurities
- Oxidizing or reducing condition, chlorine species, ferric / cupric ions and mixed chemical risk
- Temperature, pressure, flow velocity, stagnant zones, crevices and cleaning cycle
- Existing material failure: pitting, crevice corrosion, SCC, weld corrosion or general corrosion
- Tube form, wall thickness, standard, inspection method and end-user specification
- Whether C276, C4, Alloy 625, Alloy 825, titanium or duplex stainless steel has also been reviewed
Hastelloy C22 Welded and Seamless Tube Specification Reference
The following data is provided as a quotation reference. Exact standard, tolerance, heat treatment, surface condition, testing and documents should be confirmed before order production.
| Item | GAOFA TECH Supply Direction | Buyer Notes |
|---|---|---|
| Material | Hastelloy C22 / Alloy C-22 / Alloy 22 / UNS N06022 / W.Nr. 2.4602 | Please confirm the exact material wording required on quotation, contract, MTC and shipping documents. |
| Tube Forms | Welded tube and seamless tube directions | Tube form should be selected according to medium, pressure, size, standard, fabrication process and customer specification. |
| Welded Tube Range | OD 6.0 mm to 88.9 mm; wall thickness 0.3 mm to 2.0 mm | Commonly reviewed for welded heat exchanger tubes, process tubes, scrubber tubes and fabricated chemical equipment when welded tube is accepted. |
| Seamless Tube Range | OD 6.0 mm and above; wall thickness according to confirmed size, standard and customer specification | Smaller OD may be reviewed case by case according to quantity, wall thickness, tolerance, production route and inspection requirement. |
| Length | Standard 6000 mm or cut length according to customer requirement | Fixed length, random length and cutting tolerance should be confirmed. |
| Common Standards | ASTM B622, ASTM B626, ASTM B619, ASTM B751, ASTM B829 and customer specifications where applicable | B622 is commonly reviewed for seamless pipe and tube; B626 for welded tube; B619 for welded pipe. The correct standard depends on tube form and customer specification. |
| Heat Treatment / Condition | Solution annealed, bright annealed or agreed condition according to production route and specification | Condition should match corrosion performance, downstream bending, welding, expansion, installation or fabrication requirement. |
| Inspection | Dimensional inspection, visual inspection, PMI, eddy current, ultrasonic testing, pneumatic or hydrostatic testing as required or as agreed | Testing scope, sampling level and acceptance criteria should be confirmed before production. |
Oxidizing Chloride Media and Localized Corrosion Review
This is the main technical module for Hastelloy C22 tube. C22 is often reviewed where chloride-containing, oxidizing or mixed chemical environments create risk of pitting corrosion, crevice corrosion and stress corrosion cracking.
| Review Condition | Why Alloy C22 May Be Considered | Information to Provide |
|---|---|---|
| Oxidizing Chloride Media | Alloy C22 may be reviewed when oxidizing chemicals and chlorides are both present, especially where localized corrosion risk is a concern. | Chloride level, oxidizing species, concentration, temperature, pH, impurities and operating cycle. |
| Pitting Corrosion Risk | C22 is often discussed for environments where pitting corrosion limits stainless steel, duplex stainless steel or other alloy directions. | Chloride concentration, temperature, stagnant zones, cleaning chemicals, surface condition and existing failure photos. |
| Crevice Corrosion Risk | C22 may be reviewed where gasket areas, tube sheets, deposits, crevices or low-flow zones increase localized corrosion risk. | Equipment design, crevice location, gasket material, deposits, flow velocity, cleaning method and inspection history. |
| Stress Corrosion Cracking Review | C22 may be reviewed where chloride stress corrosion cracking risk is part of the end-user specification or material review. | Chloride level, temperature, stress condition, fabrication process, residual stress, welding and forming requirements. |
| Mixed Chemical Streams | C22 can be reviewed when the process contains both oxidizing and reducing components or when chemistry changes during operation. | Full chemistry, upset conditions, cleaning media, batch variation, temperature and allowable corrosion rate. |
| Existing Material Failure | Alloy C22 may be reviewed when previous materials failed due to pitting, crevice corrosion, SCC or weld-related corrosion. | Existing material, failure mode, service time, photos, medium data and target improvement. |
Chemical Processing, Acid Service and Corrosive Heat Exchanger Review
Hastelloy C22 is frequently reviewed for chemical processing equipment, corrosive heat exchangers, acid service and scrubber systems. The correct alloy cannot be selected by application name alone.
| Application Direction | How C22 Should Be Reviewed | Buyer Notes |
|---|---|---|
| Chemical Processing Equipment | C22 may be reviewed for reactors, columns, process tubes and chemical equipment exposed to mixed corrosive media. | Provide complete process chemistry, operating temperature, pressure, cleaning cycle and material specification. |
| Corrosive Heat Exchangers | Welded or seamless C22 tubes may be reviewed for heat exchangers handling chloride-containing or oxidizing corrosive fluids. | Confirm tube-side and shell-side media, design temperature, fouling, cleaning method, expansion or welding requirement. |
| Acid Service Review | C22 may be reviewed for selected acid service, especially when chloride contamination, oxidizing impurities or mixed chemicals are present. | Provide acid type, concentration, temperature, impurities, oxidizing or reducing condition and allowable corrosion rate. |
| Scrubbers and Pollution Control | C22 may be reviewed for scrubbers, FGD-related equipment, absorber zones and corrosive gas condensate environments. | Provide SOx, NOx, chlorides, fluorides, slurry condition, pH, temperature and erosion risk. |
| Pharmaceutical and Specialty Chemicals | C22 may be reviewed for selected specialty chemical equipment where corrosion control and contamination control are important. | Provide medium composition, cleaning chemicals, surface condition, inspection and documentation requirements. |
| Replacement Tube Projects | C22 may be reviewed when existing stainless steel, duplex, titanium, Alloy 625 or C276 service history requires material reassessment. | Provide existing material, failure mode, target life, installation drawing and end-user approval requirement. |
How to Compare C22 with C276, C4, Inconel 625, Alloy 825 and Titanium
Alloy C22 should be positioned as a corrosion-resistant nickel alloy tube direction for oxidizing chloride media, localized corrosion review and selected chemical processing conditions. It should not be described as simply better than C276 in all environments.
| Material Direction | Common Review Direction | Selection Notes |
|---|---|---|
| Hastelloy C22 / Alloy C-22 | Oxidizing chloride media, pitting corrosion, crevice corrosion, stress corrosion cracking review, chemical processing and corrosive heat exchangers | Review when oxidizing chloride conditions, localized corrosion risk or customer specification points toward UNS N06022. |
| Hastelloy C276 / Alloy C-276 | Severe corrosion, mixed acid, chloride-bearing media, FGD, scrubbers and corrosive heat exchangers | Review C276 when broad severe corrosion, mixed acid or more reducing acid conditions are central to the specification. |
| Hastelloy C4 / Alloy C-4 | Thermal stability, weld-related service review and selected chemical processing conditions | Review C4 when weld heat-affected-zone stability or post-weld corrosion concerns are key parts of the specification. |
| Inconel 625 / Alloy 625 | Seawater, chloride service, offshore equipment, chemical processing and selected high-temperature corrosive service | Often reviewed before C22 in some chloride service projects, but C22 may be considered when oxidizing chloride or localized corrosion risk is more critical. |
| Alloy 825 | Sulfuric acid, phosphoric acid and selected acid service | May be more cost-effective in selected acid environments, but may not be enough for more demanding oxidizing chloride or mixed chemical service. |
| Titanium Tube | Seawater cooling, chloride cooling water and selected oxidizing chloride service | Excellent for many seawater applications, but not suitable for every reducing acid, high-temperature chemical or mixed chemical environment. |
| 316L / Duplex Stainless Steel | Lower-cost corrosion-resistant tube directions for less aggressive conditions | Review only when chloride, temperature, acid concentration and localized corrosion risk are within acceptable limits. |
Welded vs Seamless Hastelloy C22 Tube Selection Guide
One important purchasing question for Hastelloy C22 is whether welded tube or seamless tube should be reviewed. The answer depends on standard, pressure, size, corrosive medium, fabrication process and inspection requirement.
| Selection Factor | Welded Alloy C22 Tube | Seamless Alloy C22 Tube |
|---|---|---|
| Typical Purchasing Direction | Often reviewed for welded heat exchanger tubes, process tubing, scrubber tubes and fabricated chemical equipment when welded tube is accepted. | Often reviewed where the specification requires seamless tube, higher wall thickness, pressure-related service or specific end-user approval. |
| Reference Size Range | OD 6.0–88.9 mm, wall thickness 0.3–2.0 mm. | OD 6.0 mm and above; wall thickness according to confirmed size, standard and customer specification. Smaller OD may be reviewed case by case. |
| Common Standards | Commonly reviewed with ASTM B626, ASTM B619, ASTM B751 and customer specifications where applicable. | Commonly reviewed with ASTM B622, ASTM B829 and applicable general requirements. |
| Inspection Focus | Weld condition, dimensional inspection, eddy current testing, pneumatic or hydrostatic testing when required. | Dimensional inspection, ultrasonic testing, hydrostatic testing, eddy current testing or other inspection according to specification. |
| Corrosion Review | Welded tube can be reviewed when accepted by standard, service condition and customer approval. | Seamless tube should be reviewed when seamless construction is required by pressure, corrosion service, standard or end-user specification. |
| RFQ Decision | Provide service medium and confirm whether welded tube is acceptable. | Provide standard, pressure, wall thickness, inspection requirement and reason for seamless tube selection. |
Hastelloy C22 Chemical Composition Reference
For website readability, this section provides a buyer-oriented composition reference. Final acceptance should follow the confirmed standard, purchase specification and MTC.
| Grade | Common Names | Main Alloy Direction | Typical Composition Reference | Application Review |
|---|---|---|---|---|
| Hastelloy C22 | Alloy C-22 / Alloy 22 / UNS N06022 / 2.4602 | Nickel-chromium-molybdenum-tungsten alloy | Ni balance, Cr 20.0–22.5, Mo 12.5–14.5, Fe 2.0–6.0, W 2.5–3.5, Co 2.5 max, with controlled C, Si, Mn, P, S and V according to specification | Oxidizing chloride media, pitting / crevice corrosion review, SCC review, chemical processing, acid service and corrosive heat exchangers |
Applications of Hastelloy C22 Tube
Hastelloy C22 tube may be reviewed for chemical processing, oxidizing chloride media, corrosive heat exchangers, acid service, scrubber equipment and localized corrosion-sensitive environments. Final suitability depends on the actual medium, temperature, pressure, corrosion mechanism and customer specification.
Oxidizing Chloride Media
Alloy C22 tube can be reviewed when chloride-containing media and oxidizing chemicals create localized corrosion concerns.
Corrosive Heat Exchanger Tubes
Reviewed for shell and tube heat exchangers, condensers or process coolers handling chloride-containing or mixed corrosive media.
Chemical Processing Tubes
C22 may be reviewed for reactors, columns, process tubes and chemical equipment where mixed corrosion conditions are present.
Pitting and Crevice Corrosion Review
Reviewed where localized corrosion at deposits, tube sheets, gasket areas, crevices or stagnant zones is a major concern.
Stress Corrosion Cracking Review
C22 may be reviewed where chloride stress corrosion cracking risk is part of the material selection or end-user specification.
Scrubbers and Pollution Control
Alloy C22 tubes may be reviewed for scrubber systems, absorber zones and corrosive gas condensate environments.
Acid Service Review
C22 may be reviewed for selected acid service, especially when chloride contamination or oxidizing impurities are present.
Pharmaceutical and Specialty Chemical Equipment
Reviewed for selected specialty chemical or pharmaceutical process equipment where corrosion control and cleanliness are important.
Replacement Tube Projects
C22 may be reviewed when previous tube materials failed due to pitting, crevice corrosion, SCC or chemical corrosion.
Inspection and Quality Control for Hastelloy C22 Tube
Inspection requirements should be confirmed according to tube form, standard, service condition and customer specification.
| Inspection Item | Purpose | Buyer Notes |
|---|---|---|
| Material Verification | Confirm Alloy C22 material identity and traceability | MTC, heat number and PMI checking can be discussed as required or as agreed. |
| Dimensional Inspection | Check OD, wall thickness, length and tolerance | Important for heat exchanger assembly, process tube installation, replacement tube projects and chemical equipment fabrication. |
| Visual Inspection | Review outer surface, inner surface where applicable, tube ends and handling condition | Surface condition should be checked according to order requirement and downstream process. |
| Eddy Current Testing | Review tube integrity according to standard or agreed requirement | Testing method, acceptance criteria and record requirement should be confirmed before production. |
| Ultrasonic Testing | Discuss flaw detection for selected tube sizes and applications | UT feasibility depends on material, size, wall thickness, tube form and specification. |
| Pneumatic / Hydrostatic Testing | Check tightness or pressure-related requirements when specified | The correct method should be selected according to standard, application and customer requirement. |
| Internal Cleanliness | Support chemical process tube cleanliness, heat exchanger cleanliness or customer-specific requirements | Sponge cleaning, air blowing, dryness and end protection should be confirmed when required. |
| Packing Review | Protect tube surface, tube ends and shipment condition | Bundle protection, wrapping, wooden case and packing photos can be discussed before shipment. |
View Tube Inspection and Quality Control Details
Review GAOFA TECH’s tube inspection examples, including PMI checking, OD inspection, wall thickness inspection, visual inspection, eddy current testing, pneumatic testing, ultrasonic testing, internal cleanliness checking, fatigue testing and packing review.
Information Needed for a Hastelloy C22 Tube Quotation
A complete RFQ helps confirm the correct Alloy C22 tube form, size, standard, service condition, inspection scope and packing requirement.
For chemical processing, oxidizing chloride media, acid service, scrubber, corrosive heat exchanger or replacement tube projects, please include medium composition, chloride level, concentration, temperature, pressure, corrosion condition and whether welded or seamless tube is required.
Best RFQ practice: If you are replacing stainless steel, duplex stainless steel, titanium, Alloy 825, Inconel 625, C276, C4 or another alloy, please also tell us the existing material, failure reason, working medium and target improvement.
- Material grade: Hastelloy C22, Alloy C-22, Alloy 22, UNS N06022, 2.4602 or customer-specific material wording
- Tube form: welded tube or seamless tube
- OD, wall thickness, tolerance and length
- Quantity: pieces, meters, kilograms or annual consumption
- Standard: ASTM B622, ASTM B626, ASTM B619, ASTM B751, ASTM B829 or customer specification
- Application: heat exchanger, chemical processing, acid service, scrubber, reactor, column, replacement tube or other use
- Working medium, acid type, concentration, pH, chloride level and impurities
- Operating temperature, maximum temperature, pressure, flow velocity and corrosion history
- Oxidizing or reducing condition, chlorine species, ferric ions, cupric ions, fluorides or mixed chemical details
- Surface condition, heat treatment and downstream fabrication requirement
- Internal cleanliness, dryness, sponge cleaning or end protection requirement
- Inspection requirement: dimensional, visual, PMI, eddy current, UT, pneumatic, hydrostatic or other test
- Documents: MTC, inspection report, packing photos or customer-specific documents
- Packing requirement, destination and expected delivery schedule
Send Your Hastelloy C22 Tube Requirement
Please send material grade, tube form, OD, wall thickness, length, quantity, standard, application, working medium, chloride level, concentration, temperature, pressure, corrosion condition, inspection requirement and packing details. GAOFA TECH will review the Alloy C22 tube quotation according to your specification.
Hastelloy C22 Tube FAQ
What is Hastelloy C22 tube used for?
Hastelloy C22 tube may be reviewed for oxidizing chloride media, chemical processing equipment, corrosive heat exchangers, acid service, scrubber systems, pitting and crevice corrosion review, stress corrosion cracking review, reactors, columns and selected chloride-containing chemical environments.
Does GAOFA TECH supply both welded and seamless Hastelloy C22 tubes?
Yes. GAOFA TECH can review both welded and seamless Hastelloy C22 tube directions according to size, standard, application, inspection requirement and customer specification.
What is the regular seamless Hastelloy C22 tube size range?
For website quotation reference, GAOFA TECH lists seamless Hastelloy C22 tube as OD 6.0 mm and above, with wall thickness according to confirmed size, standard and customer specification. Smaller OD may be reviewed case by case according to quantity, wall thickness, tolerance, production route and inspection requirement.
What standards are commonly reviewed for Hastelloy C22 tube?
Common standards include ASTM B622 for seamless pipe and tube, ASTM B626 for welded tube, ASTM B619 for welded pipe, and ASTM B751 / B829 general requirements where applicable. The correct standard depends on tube form and customer specification.
How is Hastelloy C22 different from Hastelloy C276?
Hastelloy C22 is often reviewed when oxidizing chloride media, pitting corrosion, crevice corrosion or stress corrosion cracking risk is central to the material selection. Hastelloy C276 is often reviewed for severe corrosion, mixed acid and broader chemical corrosion service. Final selection depends on medium, temperature, impurities and corrosion data.
When should Hastelloy C276 be reviewed instead of C22?
C276 should be reviewed when the main concern is broad severe corrosion, mixed acid service or more reducing acid conditions. C22 should be reviewed when oxidizing chloride media and localized corrosion resistance are more important. The final decision should follow customer specification and corrosion review.
How is Hastelloy C22 different from Hastelloy C4?
C22 is commonly reviewed for oxidizing chloride media and localized corrosion resistance. C4 may be reviewed when thermal stability, weld heat-affected-zone behavior or post-weld corrosion concerns are important. Material choice should be based on actual service conditions and customer requirements.
Can Hastelloy C22 tube be used in oxidizing chloride media?
Hastelloy C22 may be reviewed for oxidizing chloride media, but it should not be selected by chloride content alone. Temperature, pH, oxidizing species, acid concentration, impurities, crevice geometry, flow condition and allowable corrosion rate should be reviewed.
Can Hastelloy C22 tube be used for heat exchangers?
Yes, Hastelloy C22 tube can be reviewed for selected shell and tube heat exchangers, condensers or process coolers handling chloride-containing or mixed corrosive fluids. Suitability depends on tube-side and shell-side media, temperature, pressure, fouling, cleaning method and standard.
Is Hastelloy C22 always better than C276?
No. C22 and C276 have different material positioning. C22 is often reviewed for oxidizing chloride media and localized corrosion risk, while C276 remains widely reviewed for severe corrosion and mixed acid service. The better choice depends on actual medium, temperature, impurities, fabrication process and customer approval.
What information is needed before quotation?
Please provide material grade, tube form, OD, wall thickness, length, quantity, standard, application, working medium, chloride level, concentration, temperature, pressure, corrosion condition, inspection requirement and packing details.