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Ni200 Seamless Nickel Tube OD 25mm WT 2mm for Heat Exchanger Piping
Premium-grade cold drawn UNS N02200 seamless nickel piping engineered for severe chemical processing, caustic evaporators, and thermal exchange systems.
- Overview
- Specifications
- Characteristics
- Applications
- Advantage
- FAQ
- Recommended Products
Product Summary
This cold drawn Ni200 seamless nickel tube features an outer diameter of 25mm and a wall thickness of 2mm, manufactured from commercially pure nickel (99.6% min). Designed specifically for industrial heat exchangers, condenser tubing, and chemical processing lines, it delivers exceptional resistance to caustic alkalis, neutral and acidic salts, dry halogens, and thermal stress. Fully annealed with uniform grain structure to ensure superior ductility, high thermal conductivity, and leak-free reliability under high-temperature operating conditions.
Product Overview
Industrial thermal management and chemical transfer systems operating in aggressive environments demand piping solutions that resist embrittlement and catastrophic stress corrosion cracking. The Ni200 Seamless Cold Drawn Nickel Tube (OD 25mm, WT 2mm) provides an optimal balance of structural integrity and corrosion resistance. Commercially pure nickel possesses unique metallurgical stability in non-oxidizing acids and alkaline media, retaining ductile performance across temperature extremes from sub-zero cryogenic vessels up to 315°C continuous service. Precision cold drawing guarantees tight dimensional tolerances, smooth interior surface finishes for optimized fluid dynamics, and dependable burst pressure limits essential for high-efficiency heat exchangers and process reactors.
Technical Specifications & Baseline Parameters:
| Parameter | Standard Value |
|---|---|
| Material Grade | Ni200 / UNS N02200 / Commercially Pure Nickel |
| Manufacturing Process | Cold Drawn, Seamless, Bright Annealed |
| Outer Diameter (OD) | 25 mm (Custom tolerances available) |
| Wall Thickness (WT) | 2 mm |
| Density | 8.89 g/cm³ |
| Melting Point | 1435 - 1446 °C |
| Curie Temperature | 358 °C |
| Electrical Resistivity | ~0.096 μΩ·m |
| Shear Modulus | ~76 GPa |
| Annealed Hardness | 90 - 120 HB |
| Tensile Strength (Rm) | ≥ 380 MPa |
| Yield Strength (Rp0.2) | ≥ 100 MPa |
| Elongation (A5) | ≥ 40% |
| Minimum Order Quantity (MOQ) | 10 kg |
Chemical Composition (%):
| Element | Ni (+Co) | C | Mn | Fe | S | Si | Cu |
|---|---|---|---|---|---|---|---|
| Min / Max | ≥ 99.60% | ≤ 0.15% | ≤ 0.35% | ≤ 0.40% | ≤ 0.01% | ≤ 0.35% | ≤ 0.25% |
Key Engineering Characteristics and Metallurgy of Ni200 Tubing:
- Unsurpassed Caustic Resistance: Unmatched chemical inertness against molten caustic soda, potassium hydroxide, and alkaline solutions across various concentration and temperature ranges.
- Superior Thermal Transfer Efficiency: High thermal conductivity combined with corrosion resistance allows efficient heat exchange without excessive fouling or scale buildup.
- Uniform Seamless Construction: Cold drawing and controlled atmosphere bright annealing ensure zero weld seam vulnerability, uniform wall thickness, and defect-free pressure containment.
- Resistance to Stress Corrosion Cracking: Immunity to chloride-induced stress corrosion cracking commonly seen in standard austenitic stainless steel tubes.
- Excellent Formability and Weldability: Annealed hardness of 90-120 HB enables smooth cold bending, flaring, coiling, and orbital TIG welding for complex piping layouts.
Critical Industrial Applications for Ni200 Heat Exchanger Pipes:
- Caustic Soda Production and Evaporator Piping: Critical piping and heating elements used in chlor-alkali production, caustic concentration, and molten salt heat transfer loops.
- Chemical and Petrochemical Processing: Reaction vessels, condenser coils, organic chloride synthesis tubing, and storage tank heating jackets.
- Synthetic Fiber and Rayon Manufacturing: Spin bath heat exchangers and aggressive chemical delivery lines requiring contamination-free purity.
- Marine and Desalination Systems: High-durability heat exchanger bundles handling de-aerated seawater and neutral salt solutions.
- Power Generation and Aerospace: Thermocouple protection sheaths, rocket engine fuel line manifolds, and specialty cooling ducts.
Why Choose DLX for Nickel Alloy Tubing Manufacturing:
- Production Capacity: Reliable supply chain powered by an integrated manufacturing capacity of 1,200 tons per month across high-performance nickel and specialty alloy production lines.
- End-to-End Quality Verification: Comprehensive in-house testing including 100% Eddy Current testing, hydrostatic pressure verification, ultrasonic inspection, and spectrographic chemical analysis with full mill test reports (MTR).
- Precision Dimensional Tolerances: Advanced cold drawing dies ensure outer diameter tolerances within ±0.05 mm and concentric wall thickness control.
- Flexible B2B Procurement: Low MOQ of 10 kg for standard project runs, and custom cut-to-length packaging.
- Global Logistics and Engineering Support: Export-grade wooden crate packaging, rust-preventive sealing, and direct metallurgical engineering consultation for OEM equipment builders.
Frequently Asked Questions (FAQ) Regarding Ni200 Seamless Tubes:
Q: What operating temperature limit is recommended for Ni200 tubing in continuous service?
A: Ni200 is generally recommended for continuous service at temperatures up to 315°C (600°F). For operating environments above 315°C where carbon precipitation and graphitization may occur, low-carbon Ni201 is recommended.
Q: How does the OD 25mm WT 2mm tube handle pressure in heat exchanger systems?
A: The cold drawn seamless structure with a 2mm wall thickness provides strong burst pressure safety margins, capable of supporting standard medium-to-high pressure industrial heat exchanger working requirements. Exact working pressures depend on system operating temperature and safety factors.
Q: Can DLX supply customized tube lengths, U-bends, or tighter dimensional tolerances?
A: Yes. In addition to standard straight lengths (3m, 6m, or custom cut lengths), DLX provides specialized U-bent heat exchanger tubes, coiled tubing, and precision polishing down to Ra ≤ 0.4 μm upon request.
Q: What surface finish is provided on the inner and outer diameters of the seamless nickel pipe?
A: The tubes are supplied with a bright annealed or pickled smooth surface finish, clean, degreased, and free from scale, slivers, cracks, or mechanical scratches to ensure minimal flow resistance and optimal heat transfer.
