What is Nickel 200/201 Seamless Tube?

Nickel seamless tubes are high-purity industrial tubing solutions manufactured from commercially pure nickel (≥99.6%), designed for use in extreme corrosive and high-temperature environments.

Grades UNS N02200 (Nickel 200) and UNS N02201 (Nickel 201) are widely used where stainless steel and standard alloys are insufficient, especially in:

• Strong alkaline environments (NaOH, KOH)
• Fluorine and dry chlorine service
• High-purity and vacuum systems

Seamless nickel tubes are produced via hot piercing and cold drawing, resulting in:

• Fully homogeneous microstructure
• No weld seam defects
• Superior pressure and corrosion performance

1. Exceptional Corrosion Resistance

• Outstanding resistance to:
  • Caustic alkalis (NaOH, KOH)
  • Fluorine and chlorine environments
• Maintains stability across a wide temperature range

2. High Purity & Metallurgical Stability

• Nickel content ≥ 99.6%
• Low impurity levels ensure consistent performance
• Ideal for high-purity processing systems

3. Excellent Thermal & Electrical Conductivity

• Higher conductivity than most nickel alloys
• Suitable for:
  • Electronic components
  • Heat transfer applications

4. Wide Temperature Performance Range

• Nickel 200: up to 315°C (600°F)
• Nickel 201: optimized for higher temperatures (low carbon prevents graphitization)
• Maintains mechanical integrity at both:
  • Cryogenic temperatures
  • Elevated temperatures

5. Seamless Structural Integrity

• No weld seams
• Eliminates weld decay and leakage risks
• Suitable for high-pressure and vacuum environments

Available Grades

Applicable Standards

• ASTM B161 – Seamless Nickel Pipe & Tube
• ASTM B163 – Condenser & Heat Exchanger Tubes
• ASME SB161 / SB163
• EN / DIN equivalents available upon request

Size Range

• Outer Diameter (OD): 3.18 mm – 219.1 mm
• Wall Thickness (WT): 0.5 mm – 20 mm

Pipe Schedules

• SCH 5S / 10S / 40S / 80S / XXS

Forms & Configurations

• Round, Square, Rectangular
• U-Bent tubes for heat exchangers

Length Options

• Random lengths
• Fixed cut lengths (up to 12 meters)

Surface Finishes

• Bright Annealed (BA)
• Annealed & Pickled (AP)
• Polished (custom Ra available)

Typical Applications of Nickel Seamless Tubes

Nickel 200/201 tubes are widely used in highly corrosive and high-purity industries:

Chemical Processing Industry

• Caustic soda production
• Chlorine and fluorine systems
• Organic and inorganic chemical processing

Power Generation

• Nuclear reactor components
• High-pressure steam systems

Oil & Gas Industry

• Downhole instrumentation
• Subsea sensors

Aerospace & Defense

• Fuel systems
• High-temperature hydraulic lines

Electronics & Vacuum Systems

• Cathode ray tubes
• Electronic valve components
• High-vacuum applications

Manufacturing Process

• Hot Piercing
• Cold Drawing
• Solution Annealing and controlled cooling

Inspection & Testing

Material Verification

• 100% PMI (Positive Material Identification)

Non-Destructive Testing (NDT)

• Ultrasonic Testing (UT)
• Eddy Current Testing (ET)

Pressure Testing

• Hydrostatic testing for leak integrity

Dimensional Inspection

• Precision OD and wall thickness control

Certification

• EN 10204 3.1 / 3.2 MTC
• Full traceability documentation