Ni200 Ni201 Pure Nickel Pipe — Hydrofluoric Acid Resistant, Custom Sizes
Process lines that handle hydrofluoric acid demand a material that does not compromise under aggressive media — purity, seam integrity and correct grade selection decide service life. This pure nickel pipe is offered in Ni200 (UNS N02200) and Ni201 (UNS N02201), grades long specified for hydrofluoric acid environments and general chemical service. Seamless construction removes the weld seam, and custom sizing lets the pipe match your line exactly rather than forcing the line to fit a stock size. With per-batch composition testing and EN 10204 3.1 documentation, the pipe arrives with the evidence behind its performance.
Dimensions & Tolerances
| Parameter | Value | Note |
|---|---|---|
| Product form | Seamless pure nickel pipe / tube (cold-worked) | no longitudinal weld seam |
| Size | Customized per drawing | OD / wall thickness / length |
| Temper | Annealed / cold-worked | per drawing |
| Surface finish | Pickled / bright | per drawing |
| Tolerances | Per ASTM B161 / GB/T 2882-2023 | exact values per drawing |
The 10 kg minimum order for custom pipes covers drawing setup and heat allocation, so tolerances can be locked per drawing.
Key Strengths
- Hydrofluoric acid resistance — pure nickel is an established material for HF environments in industrial service.
- Ni200 and Ni201 grades — UNS N02200 for chemical service, low-carbon UNS N02201 for high-temperature duty.
- Seamless construction — cold-worked seamless pipe with no longitudinal weld seam.
- Customized size — OD, wall thickness and length manufactured per drawing.
- Verified nickel content — ≥99.2% (Ni200) / ≥99.0% (Ni201), tested per batch with EN 10204 3.1 documentation.
Technical Deep Dive
1. Hydrofluoric Acid Service
Pure nickel is a long-established material for handling hydrofluoric acid, from anhydrous HF systems to aqueous acid service in chemical plants. Resistance in practice depends on acid concentration, temperature and aeration, so the grade and wall schedule are confirmed against the actual service conditions. Ni200 and Ni201 cover the industrial HF duty band; share your media conditions and we will confirm the grade and dimensions for the application.
2. Ni200 vs Ni201 Grade Selection
| Aspect | Ni200 (UNS N02200) | Ni201 (UNS N02201) |
|---|---|---|
| Nickel content | ≥99.2% | ≥99.0% |
| Carbon content | ≤0.15% | ≤0.02% |
| Best application | Battery, chemical | High-temp service |
| Typical duty | Chemical and HF service | Elevated-temperature service where carbide precipitation matters |
3. Seamless vs Welded Pipe
| Aspect | Seamless (cold-worked) | Welded |
|---|---|---|
| Longitudinal weld seam | None | Present |
| Wall uniformity | Uniform around circumference | Dependent on weld zone |
| Aggressive-media service | Preferred | Acceptable with weld qualification |
| Governing standard | ASTM B161 / GB/T 2882-2023 | ASTM B725 |
4. Pressure Rating (calculated example)
MAWP estimated with the Barlow formula MAWP = 2·S·t/D for a reference pipe of 16 mm OD, assuming allowable stress S = 100 MPa. Size is customized per drawing; actual design values are confirmed per drawing and the governing standard.
| Wall thickness t | MAWP (16 mm OD, S = 100 MPa assumed) |
|---|---|
| 1.0 mm | 12.5 MPa |
| 1.5 mm | 18.75 MPa |
| 2.0 mm | 25.0 MPa |
All values calculated with stated assumptions — not guaranteed ratings.
5. Industrial Application Matrix
| Industry | Typical duty | Suggested grade |
|---|---|---|
| Chemical processing | HF and acid transfer lines | Ni200 |
| Energy / power | High-temperature piping | Ni201 |
| General industrial | Corrosion service | N6 |
| Electronics & vacuum | High-purity process tubing | N4 (Ni+Co ≥99.9%) |
Grade & Price Guide
| Grade | Ni Content | Best Application | Reference Price (FOB, USD/kg) |
|---|---|---|---|
| N4 (NP1) | ≥99.9% | Vacuum electronics | 420-480 |
| Ni201 | ≥99.0% | High-temp service | 350-390 |
| Ni200 | ≥99.2% | Battery, chemical | 340-380 |
| N6 (NP2) | ≥99.5% | Industrial corrosion | 300-340 |
Reference prices are FOB indicative ranges per grade; final quotation depends on size, quantity and delivery terms.
Chemical Composition
| Element (wt%) | N4 | N6 | Ni201 | Ni200 |
|---|---|---|---|---|
| Ni+Co | 99.9 | 99.5 | — | — |
| Ni | — | — | ≥99.0 | ≥99.2 |
| C | ≤0.01 | ≤0.10 | ≤0.02 | ≤0.15 |
| Cu | ≤0.015 | ≤0.10 | ≤0.25 | ≤0.25 |
| Si | ≤0.03 | ≤0.10 | ≤0.35 | ≤0.35 |
| Mn | ≤0.002 | ≤0.05 | ≤0.35 | ≤0.35 |
| Fe | ≤0.04 | ≤0.10 | ≤0.40 | ≤0.40 |
| S | ≤0.001 | ≤0.005 | ≤0.01 | ≤0.01 |
| P | ≤0.001 | ≤0.002 | — | — |
| Mg | ≤0.01 | ≤0.10 | — | — |
Source: DLX product catalogue; per-batch verification available on request.
Physical & Mechanical Properties
| Density | 8.908 g/cm³ |
| Melting point | 1435-1446°C |
| Curie temperature | 358°C |
| Tensile strength (annealed) | ≥462 MPa |
| Elongation (annealed) | ≥35% |
| Hardness (annealed) | 90-120 HB |
| Shear modulus | ~76 GPa |
| Electrical resistivity | 0.096 μΩ·m (20°C) |
| Thermal conductivity (Ni200) | 70.2 W/m·K |
Product Specifications
| Form | Seamless pure nickel pipe / tube (cold-worked) |
| Featured grades | Ni200 (UNS N02200), Ni201 (UNS N02201) |
| Size | Customized per drawing |
| Temper | Annealed / cold-worked per drawing |
| Surface finish | Pickled / bright per drawing |
| Packaging | Bundled, end-protected, wooden cases |
Quality Assurance
- Per-batch chemical composition testing with full traceability
- Dimensional inspection: OD, wall thickness and concentricity per governing standard
- Pressure verification per governing standard (ASTM B161 / GB/T 2882-2023)
- EN 10204 3.1 material test certificate available with shipment
Applicable Standards
| Ni200 / Ni201 | ASTM B161 (Seamless Nickel Pipe and Tube); ASTM B163 (Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes); ASTM B725 (Welded Nickel Pipe, where welded construction is specified) |
| N4 (NP1) / N6 (NP2) | GB/T 2882-2023 (Nickel and Nickel Alloy Pipe, published 2023-11-27, effective 2024-06-01, currently in force) |
Packaging & Delivery
Pipes are bundled with end protection to prevent edge and surface damage in transit, and shipped in wooden cases for export. Lead time: 7-15 days. Material certificates and inspection documents accompany each shipment.
About
Changzhou DLX Alloy Co., Ltd. has manufactured nickel alloys since 2002 in a 12,000 m² factory rated at 1,200 tonnes per year. Corrosion in media such as hydrofluoric acid is often decided by impurities, not by the nickel itself. That is why every DLX order starts with a grade-level impurity budget — carbon, iron, copper, sulfur — locked against the composition table, then held through melting, drawing and inspection with per-batch testing and EN 10204 3.1 documentation.
FAQ
Q1: What hydrofluoric acid service can this pipe handle?
A: Pure nickel is an established material for HF environments. Practical resistance depends on acid concentration, temperature and aeration; provide your service conditions and we will confirm the grade and dimensions for the application.
Q2: What is the difference between Ni200 and Ni201?
A: The carbon content: Ni200 at ≤0.15% for general chemical service, Ni201 at ≤0.02% for elevated-temperature service where carbide precipitation matters.
Q3: Can the pipe be made to my size?
A: Yes. OD, wall thickness and length are manufactured per drawing, with tolerances locked at order confirmation.
Q4: Which standards does the pipe comply with?
A: Ni200 / Ni201 pipes follow ASTM B161 (seamless), with B163 and B725 referenced by service; N4 / N6 pipes follow GB/T 2882-2023, effective since 2024-06-01.
Q5: What is the minimum order quantity?
A: 10 kg for custom pipes. Sample policy: free 0.5 kg for Ni200 / N6; Ni201 and N4 samples are charged, refundable with first orders above 50 kg.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.