01
Hastelloy C-22 Seamless Pipe
Above all, pressure and transfer lines to ASTM B622, hot finished or cold finished.
Request Availability →Hastelloy C-22 Pipe and Tube — B622 to B626 Supply
Seamless tube to B622 plus welded pipe and tube to B619 and B626, sized for oxidizing and mixed-acid service.
Seamless Coverage to the B622 Limit
Above all, B622 covers seamless tube to 88.9 mm outside diameter, and welded routes carry the larger line sizes.
Post-Weld Anneal as Standard
Every welded length is solution annealed and water quenched after its seam, so it meets the ordered document.
Grade Data Behind the Tube
Also, composition, standards, and mechanical minimums for UNS N06022 sit together on one hub page.
PRODUCT OVERVIEW
About Hastelloy C-22 Pipe and Tube
Hastelloy C-22 Pipe and Tube is supplied in UNS N06022 / W.Nr. 2.4602, a nickel-chromium-molybdenum-tungsten alloy with chromium above 20%. Tubular product carries that chemistry into acid, bleach, and chloride service where one stream mixes oxidizing and reducing attack.
Grade-level composition, standards, and mechanical minimums sit on the Hastelloy C-22 hub. The other two forms are covered on the Hastelloy C-22 Bar and Rod and Hastelloy C-22 Plate and Sheet pages.
PRODUCT FEATURES
Key Features of Hastelloy C-22 Pipe and Tube
Hastelloy C-22 pipe and tube covers seamless product to ASTM B622 plus welded pipe to B619 and welded tube to B626. Because B622 stops at 88.9 mm outside diameter, larger lines move to welded construction. Chromium above 20% resists nitric acid, wet chlorine, and oxidizing chloride salts, while molybdenum carries the reducing side. Every welded length leaves the plant solution annealed. EN 10204 3.1 certificates and heat-level traceability back chemical, bleach, and sour-service projects.
Hastelloy C-22
Oxidizing-Acid Tubulars
Nitric acid lines and oxidizer-bearing streams meet a chromium-rich bore that stays passive.
01
Wet Chlorine and Bleach Service
In addition, hypochlorite, chlorine dioxide, and moist chlorine transfer duty needs this chromium level.
02
Ferric and Cupric Chloride Duty
Also, pickling, etching, and leach circuits that carry oxidising salts come from the same tube.
03
Pitting and Crevice Control
Moreover, a molybdenum level near 13% holds localized attack back in brine and chloride liquor.
04
Chloride Stress-Cracking Immunity
Above all, the nickel-rich matrix shrugs off chloride-induced cracking that splits austenitic stainless grades.
05
Seam Ductility Evidence
Therefore, B622 applies flare and flattening tests that tube expansion into tubesheets requires.
06
Full Eddy-Current Coverage
Besides, B626 welded tube passes 100% eddy-current or ultrasonic examination before release.
07
Sour-Service Tubulars
Meanwhile, H2S piping travels with NACE MR0175 / ISO 15156 hardness records.
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WHY CHOOSE US
Why Choose Hastelloy C-22
Tubular C-22 splits by standard rather than by size alone. Seamless product stops at 88.9 mm outside diameter under B622, so larger lines move to welded pipe or tube. We match the route to the duty before quoting.
01
Route Split at the B622 Limit
Seamless coverage ends where B622 ends, and we quote welded product beyond that point rather than a document that does not apply.
02
Weld Filler Matched
Moreover, seams run with ERNiCrMo-10 filler to AWS A5.14, which keeps joint chemistry in step with the parent tube.
03
Tests Fixed at Order
Besides, hydrostatic, eddy-current, PMI, and third-party witness join the job as your specification requires.
04
One Thread to Dispatch
Order handling, inspection records, packing, and export papers stay with a single coordinator.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
A C-22 tubular order follows melt, hot working, cold finishing, and a water-quenched anneal before the mill releases it. However, the exact sequence moves with the standard, gauge, and acceptance level you order.
01
Charge Preparation
Nickel, chromium, molybdenum, tungsten, and iron are weighed into the N06022 window before melting starts.
02
Melt Refining
VIM or AOD treatment holds carbon and silicon inside the limits that protect weld zones.
03
Shell Formation
Billets take a pierce or extrusion pass into seamless shells, while welded product begins as flat-rolled coil.
04
Cold Finishing
Cold pilgering or drawing brings heat-exchanger and precision tube down to final outside diameter and wall.
05
Solution Annealing
Material passes through 1121 °C, then takes a rapid water quench that dissolves intermetallic phases.
06
Welding and Re-Annealing
Welded lengths receive an ERNiCrMo-10 seam, then a full solution anneal and quench.
07
Testing and Release
Our operators pickle and dimension-check each length, run hydrostatic or eddy-current tests, and release it against the ordered acceptance level.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
The C-22 window runs from small condenser tube through heavy welded pipe. Before production starts, we check the order against the rolling and annealing plan. That plan, once you approve it at quotation, is the plan that leaves the plant.
20,000+ m²
Factory Area
Rolling, welding, and heat-treatment halls sit on a single site.
50+
Production Machines
Cold pilgering, drawing, welding, and finishing lines share one quality system.
600 Tons
Monthly Capacity
Nickel alloy tubular tonnage per month, spanning stock sizes and made-to-order runs.
30+
Technical Engineers
Metallurgists settle the anneal and test scope against the process medium.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
Chemistry, mechanics, dimensions, and surface all clear before any length leaves the bay. The work runs inside our ISO 9001 system. On top of that, each shipment carries a 3.1 certificate, and third-party inspection can join the order.
01
Heat Chemistry Verification
Spectrometry confirms the N06022 window, with carbon and silicon printed beside chromium and molybdenum.
02
Tension and Hardness Results
We measure tensile, yield, and elongation on the condition and wall you ordered.
03
Dimensional and NDE Records
Outside diameter, wall, straightness, and finish carry their own records, alongside hydrostatic or eddy-current results.
04
Certificate Pack
Finally, each certificate names the heat, so a single length traces back to its melting charge.
PRODUCT FORMS
Available Product Forms
Six tubular routes serve this grade, each with its own standard and finishing sequence.
02
Hastelloy C-22 Seamless Tube
Also, condenser, exchanger, and evaporator tube to B622 with B829 general requirements.
Request Availability →
03
Hastelloy C-22 Welded Pipe
Likewise, B619 pipe takes a matching-filler seam and a post-weld solution anneal.
Request Availability →
04
Hastelloy C-22 Welded Tube
B626 tube holds a tighter outside-diameter tolerance and 100% eddy-current examination.
Request Availability →
05
Coil and U-Bend Tube
Coiled lengths and custom U-bends are formed from annealed B622 stock.
Request Availability →
06
EP and BA Tube
Electropolished or bright annealed bores serve pharmaceutical and high-purity circuits.
Request Availability →
APPLICATIONS
Engineered For Demanding Industries
Wall life here follows the medium rather than the pressure rating, since acid and chloride attack decide how long the tube lasts. Each service below therefore pairs an environment with the tube form that carries it.
Discuss Your Application →
01
FGD Absorber Internals
Spray headers, drain lines, and duct take-offs that handle limestone-gypsum slurry.
02
Wet Chlorine Transfer Lines
Bleach plant, disinfection, and chlorine dioxide circuits that carry moist chlorine.
03
Nitric Acid Recovery
Column internals, reboiler tube, and transfer lines for HNO3 service.
04
Mixed-Acid Process Piping
In addition, lines that swing between oxidizing and reducing chemistry during normal operation.
05
Seawater-Cooled Condensers
Exchanger tube in once-through and offshore cooling circuits.
06
Pickling and Etching Lines
For example, heating coils and transfer pipe for ferric and cupric chloride baths.
07
Pharmaceutical Reactor Circuits
Electropolished bore tube serves clean chemical and API circuits.
08
Sour Gas Gathering Lines
Treatment and gathering piping for H2S-bearing production.
09
Phosphoric Acid Evaporators
Finally, exchanger bundles handle wet-process acid concentration lines.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
Limits for the tubular family follow one window across B622, B619, and B626 for UNS N06022. Chromium above 20% drives oxidizing resistance, molybdenum and tungsten hold the reducing and pitting side, and carbon stays at 0.015% max to protect the welded seam. Even so, the purchase specification in force decides acceptance.
| Element | Content |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 20.0–22.5% |
| Molybdenum (Mo) | 12.5–14.5% |
| Tungsten (W) | 2.5–3.5% |
| Iron (Fe) | 2.0–6.0% |
| Cobalt (Co) | 2.50% max. |
| Manganese (Mn) | 0.50% max. |
| Vanadium (V) | 0.35% max. |
| Silicon (Si) | 0.08% max. |
| Carbon (C) | 0.015% max. |
| Phosphorus (P) | 0.020% max. |
| Sulfur (S) | 0.020% max. |
Mechanical Properties
Minimum values below come from the governing tubular document in the solution-annealed condition. Because C-22 holds one yield floor across every form, the same 310 MPa figure covers seamless and welded product alike.
| Product Form | Standard | Condition | Tensile Strength | Yield Strength, 0.2% Offset | Elongation |
|---|---|---|---|---|---|
| Seamless pipe and tube | ASTM B622 | Solution annealed | ≥690 MPa (100 ksi) | ≥310 MPa (45 ksi) | ≥45% |
| Welded pipe | ASTM B619 | Solution annealed after welding | ≥690 MPa (100 ksi) | ≥310 MPa (45 ksi) | ≥45% |
| Welded tube | ASTM B626 | Solution annealed after welding | ≥690 MPa (100 ksi) | ≥310 MPa (45 ksi) | ≥45% |
B622 adds hydrostatic, flattening, and flare testing to seamless product. B626 brings a 100% eddy-current or ultrasonic examination, which suits exchanger duty. C-22 carries no aerospace AMS document, so aerospace tube follows the project specification or the ASTM document named on the order.
Physical Properties
| Property | Value |
|---|---|
| Alloy | Hastelloy C-22 |
| UNS | N06022 |
| Werkstoff | 2.4602 |
| Density | Approx. 8.69 g/cm³ |
| Melting Range | Approx. 1357–1399 °C |
| Elastic Modulus | Approx. 206 GPa |
| Thermal Conductivity | Approx. 10.1 W/m·°C at 20 °C |
| Specific Heat | Approx. 414 J/kg·°C |
| Expansion Coefficient | Approx. 12.4 µm/m·°C (20–100 °C) |
| Electrical Resistivity | Approx. 1.14 µΩ·m at 20 °C |
| Alloy Type | Nickel-chromium-molybdenum with tungsten |
Standards
| Standard | Product / Application |
|---|---|
| ASTM B622 / ASME SB622 | Seamless pipe and tube, outside diameter to 88.9 mm |
| ASTM B619 / ASME SB619 | Welded pipe, solution annealed after welding |
| ASTM B626 / ASME SB626 | Welded tube for heat exchangers, condensers, and evaporators |
| ASTM B829 | General requirements for seamless nickel alloy pipe and tube |
| ASTM B775 / B751 | General requirements for welded nickel alloy pipe and tube |
| ASME B16.25 | Buttwelding ends |
| NACE MR0175 / ISO 15156 | Sour service in oil and gas production |
| DIN 17751 | Nickel alloy tube, W.Nr. 2.4602 |
| ISO 6207 | Nickel alloy seamless tube |
| UNS N06022 · W.Nr. 2.4602 · NiCr21Mo14W · NS334 | Designations |
The tubular documents come from ASTM International. What is more, pressure-code projects file against the ASME SB edition rather than the ASTM original.
Both B619 and B626 demand a solution anneal and water quench after welding, so the as-welded condition satisfies neither document.
Dimensions
| Product Form | Typical Supply Range | Length |
|---|---|---|
| Seamless pipe | NPS 1/8 to NPS 3, outside diameter to 88.9 mm | Single random, double random, or custom |
| Seamless tube | OD 6–88.9 mm, wall 0.5–10 mm | Up to 12 m or custom cut lengths |
| Heat-exchanger tube | OD 6.35–76.2 mm, wall 0.7–6 mm | Up to 12 m or U-bend |
| Welded pipe | OD 21.3–610 mm, wall 0.5–100 mm | Fixed length or random |
| Welded tube | OD 3.18–127 mm, wall 0.38–12.7 mm | Coil or fixed length |
| EP / BA tube | OD 6–50.8 mm, wall 0.5–3 mm | Up to 6–12 m, clean service |
B622 caps seamless product at 3.5 in (88.9 mm) outside diameter, so anything larger is quoted as welded pipe or tube. Therefore, state the outside diameter, wall, length, condition, and end finish at enquiry so the route and price can be fixed.
Surface Finishes
| Surface Condition | Typical Characteristics / Applications |
|---|---|
| Solution Annealed & Pickled | Standard delivered condition for acid and chloride service |
| Bright Annealed | Smooth, scale-free bore and outside diameter for instrumentation and clean circuits |
| Pickled Only | Acid-descaled surface for general chemical piping |
| Beveled End | Weld-preparation beveling to the agreed standard for butt welds |
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 6 Simple Steps
Most tubular consignments leave two to four weeks after release, and heavy-wall welded pipe runs longer. Before we fix the price, the steps below line up standard, condition, and test scope with your duty.
1
Send the Enquiry
List the outside diameter, wall, length, and quantity, along with the medium and its temperature.
2
Fix the Standard
You choose between B622 seamless, B619 welded pipe, and B626 welded tube.
3
Confirm the Condition
Solution-annealed delivery covers seamless product, while welded lengths take the anneal after their seam.
4
Review the Offer
One reply returns price, manufacturing route, test scope, documents, and Incoterm.
5
Production and Testing
Then the plant builds and tests each length against the acceptance level fixed when you place the order.
6
Shipment
Certificates, packing list, and export papers travel with the consignment.
What Our Clients Say
Feedback from buyers and engineers who source nickel alloy materials from Southerly Alloy.
★★★★★
“Flare and flattening records came with the B622 tube, so our expansion trial needed no re-test.”
★★★★★
“Bleach plant piping met its wall tolerance throughout, and every heat number matched our inspection file.”
★★★★★
“The replacement tube for our nitric acid line arrived with the post-weld anneal record our auditor requested.”
CERTIFICATIONS & QUALITY DOCUMENTATION
Certifications & Quality Documentation
Our production and inspection processes are certified to international standards, and every delivery ships with EN 10204 3.1 mill test certificates.
ISO 9001:2015
Quality Management System
PED 2014/68/EU
Pressure Equipment Directive
ASTM / ASME
Material Standards Compliance
EN 10204 3.1
Mill Test Certificates
FAQ
Frequently Asked Questions
Which standard covers Hastelloy C-22 seamless tube?
Seamless product is ordered to ASTM B622, welded pipe to B619, and welded tube to B626. Code jurisdiction swaps in the ASME SB editions.
What outside diameter does B622 cover?
B622 limits seamless pipe and tube to 88.9 mm (3.5 in) outside diameter, supplied solution annealed and descaled. Larger lines move to welded pipe or tube under B619 or B626.
Do welded lengths need heat treatment?
Yes. Both B619 and B626 call for a full solution anneal and water quench after welding, so as-welded product meets neither document.
What is the maximum service temperature for the tube?
ASME caps continuous service at 1250 °F (677 °C). However, the medium, its concentration, and the pressure rating usually set the working ceiling.
Is the tube suitable for sour service?
Sour orders run to NACE MR0175 / ISO 15156 with per-heat hardness records, so upstream projects can file the evidence their material review needs.
What is your MOQ for Hastelloy C-22 pipe?
A single length serves most stocked sizes, and we quote trial pieces without a premium.
What are your trade terms for Hastelloy C-22 pipe?
We quote FOB by default and add EXW, CIF, or DAP alternatives on request.
How is Hastelloy C-22 pipe priced?
Weight in kilograms drives the price, against the outside diameter, wall, and condition you order.
What is the lead time for Hastelloy C-22 pipe?
Stocked sizes ship in 7-15 days, and made-to-order or heavy-wall pipe follows the confirmed schedule.
Do you provide EN 10204 3.1 or 3.2 certificates?
Yes. Each consignment carries an EN 10204 3.1 certificate, and third-party 3.2 endorsement follows on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Give us the outside diameter, wall, length, standard, and quantity, and the answer carries price, Incoterm, lead time, and the document list. Add your medium and test scope if they shape the route.
