Products Description
Our Advantages
1. Seawater Corrosion Resistance
TORICH 70 30 Copper Nickel Tube contains approximately 30% nickel, enhancing its corrosion resistance. Rigorous chemical composition testing ensures the material meets standard specifications, extending its service life in marine environments.
2. Excellent Mechanical Strength
Our tubing undergoes rigorous mechanical property testing, exhibiting excellent tensile strength, yield strength, and overall structural strength, ensuring stability during high-speed seawater flow.
3. Outstanding Thermal Stability
The 70 30 Copper Nickel Tube offers excellent thermal conductivity, supporting efficient heat transfer; its low coefficient of thermal expansion reduces the risk of thermal stress, deformation, and leakage. The balanced copper-nickel ratio provides strong resistance to thermal fatigue, enabling it to withstand repeated heating and cooling in condensers.
4. High Dimensional Accuracy
Our seamless tubing is manufactured using a cold-drawing process, resulting in a smooth surface and uniform wall thickness. Heat treatment processes prevent warping, bending, or dimensional changes during cooling. Dimensions are ensured to be accurate and conform to the dimensional tolerances specified in ASTM B111 standard, controlled within ±0.01 mm.
5. Surface Quality
The pipes undergo cold drawing and annealing processes, resulting in a smooth inner surface that reduces friction in seawater flow and improves heat transfer efficiency. Furthermore, pickling and passivation treatments ensure a clean, corrosion-resistant surface suitable for long-term exposure to seawater.
application areas
- Used in ships, marine engines, and shipboard cooling systems.
- Used in seawater-cooled heat exchangers on offshore oil and gas platforms.
- Used in condenser tubes and seawater cooling circuits exposed to high flow rates and marine environments in coastal power plants.
- Used in heat recovery, brine heaters, and evaporator heat exchangers in seawater desalination and water treatment plants.
- Condensers in HVAC and refrigeration systems.
- Industrial cooling water systems in chemical plants, refineries, and industrial facilities.
Chemical Composition
| Element | Cu | Ni | Fe
|
Mn | Zn | Pb | Others |
| Composition (%) | Balance (~70%) | 29.0 – 33.0 | 0.4 – 1.0 | 0.2 – 1.0 | 0.5 max | 0.05 max | Trace |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) | Hardness (HB) |
| Requirement | 310–517 | 110–205 | ≥ 30 | 70–120 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| CuNi 90/10 (UNS C70600) | Its lower nickel content makes it more economical than 70/30 CuNi alloys. Suitable for heat exchangers and condensers in marine environments. |
| Aluminum Brass (C68700) | More economical than copper-nickel alloys, suitable for freshwater and low-flow seawater applications. |
| Titanium Grade 2 | It has an extremely high strength-to-weight ratio. Suitable for offshore oil and gas cooling systems, chemical processing heat exchangers, etc. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
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