Marine Grade Copper Nickel Pipes
Premium Copper Nickel Pipes & Tubes: High-Performance Piping Solutions for Marine and Industrial Applications
Are you looking for reliable, corrosion-resistant piping systems that withstand the harshest marine and industrial environments?
Welcome to Haomei , a leading global manufacturer and supplier of premium Copper Nickel (CuNi) pipes and tubes. Engineered for maximum durability, our CuNi piping solutions offer unmatched resistance to seawater corrosion, biofouling, and stress cracking.
Whether you are managing an offshore drilling rig in the Gulf of Mexico, upgrading a desalination plant in the Middle East, or building naval vessels in North Sea shipyards, our globally certified products ensure uninterrupted fluid flow and long-term operational safety.
What is Copper Nickel (CuNi) Piping?
These alloys are universally recognized for their excellent ductility, toughness, and superior resistance to erosion and corrosion in moving seawater.
Industrial Copper Nickel Pipe Grades & Engineering Standards
Copper nickel alloys (universally known as cupronickel) are specialized copper-based compounds structurally fortified with nickel, iron, and manganese. Our precision production lines specialize in the two most widely specified marine grades:
Copper Nickel 90/10 (UNS C70600) and Copper Nickel 70/30 (UNS C71500).
- Copper Nickel 70/30 Pipes (UNS C71500 / CuNi30Fe1Mn): Consisting of 70% Copper and 30% Nickel. Specially engineered for extreme-velocity environments, submarine cooling loops, naval warships, and high-pressure heat exchangers where peak mechanical strength and maximum impingement attack resistance are mandatory.
- Copper Nickel 90/10 Pipes (UNS C70600 / CuNi10Fe1Mn): Consisting of 90% Copper and 10% Nickel. This grade represents the global standard for surface seawater cooling loops, fire-fighting mains, and general marine engineering due to its elite balance of high ductility, reliable anti-fouling, and excellent cost-efficiency.
International Standards Chemical Ingredients Comparison
To guarantee complete compliance across multi-regional engineering blueprints, our metallurgical manufacturing processes strictly align with European (KME, DIN, BS), American (ASTM), British (EEMUA), Japanese (JIS), and Chinese (GB/T) specifications. See the verified chemical breakdowns below:
| All types of standard copper-nickel alloys (CuNi70/30) Comparison of chemical ingredients | |||||
|---|---|---|---|---|---|
| KME CuNi70/30 |
DIN 17664 2.0882 |
BS 2871 CN107 |
ASTM B466 C71500 |
JIS H3300 C7150T |
|
| Ni% | 30.0-32.0 | 30.0-32.0 | 30.0-32.0 | 29.0-33.0 | 29.0-33.0 |
| Fe% | 0.47-0.7 | 0.4-1.0 | 0.4-1.0 | 0.4-1.0 | 0.4-1.0 |
| Mn% | 0.5-1.0 | 0.5-1.5 | 0.5-1.5 | max.1.0 | 0.2-1.0 |
| C% | max.0.04 | max.0.05 | max.0.06 | max.0.05 | |
| Pb% | max.0.01 | max.0.03 | max.0.01 | max.0.02 | max.0.05 |
| S% | max.0.01 | max.0.02 | max.0.08 | max.0.02 | |
| P% | max.0.02 | max.0.02 | max.0.02 | ||
| Zn% | max.0.20 | max.0.50 | max.0.50 | max.0.50 | |
| Other | max.0.30 | max.0.30 | |||
| Cu% | rem. | rem. | rem. | rem. | +Ni+Fe+Mn min99.5 |
| All types of standard copper-nickel alloys (CuNi90/10) Comparison of chemical ingredients | ||||||||
|---|---|---|---|---|---|---|---|---|
| KME CuNi90/10 |
DIN 17664 2.0882 |
BS 2871 CN102 |
ASTM B466 C70600 |
JIS H3300 C7060T |
DIN 86019 2.1972 |
EEMUA 234 UNS 7060X |
GB/T 5231 BFe10-1.6-1 |
|
| Ni% | 10.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 | 9.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 |
| Fe% | 1.5-1.8 | 1.0-2.0 | 1.0-2.0 | 1.0-1.8 | 1.0-1.8 | 1.5-1.8 | 1.5-2.0 | 1.5-1.8 |
| Mn% | 0.6-1.0 | 0.5-1.0 | 0.5-1.0 | max.1.0 | 0.2-1.0 | 0.5-1.0 | 0.5-1.0 | 0.5-1.0 |
| C% | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | |
| Pb% | max.0.01 | max.0.03 | max.0.01 | max.0.02 | max.0.05 | max.0.01 | max.0.01 | max.0.03 |
| S% | max.0.005 | max.0.02 | max.0.05 | max.0.02 | max.0.005 | max.0.02 | max.0.01 | |
| P% | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | ||
| Zn% | max.0.05 | max.0.50 | max.0.50 | max.0.50 | max.0.05 | max.0.20 | max.0.20 | |
| Other | max.0.20 | max.0.30 | max.0.20 | max.0.30 | max.0.40 | |||
| Cu% | rem. | rem. | rem. | rem. | +Ni+Fe+Mn min99.5 |
rem. | rem. | rem. |
Copper Nickel Pipe Grades & Specifications
We manufacture and supply a full range of seamless and welded copper nickel pipes tailored to international engineering standards.
Copper Nickel Pipe DIN86019/DIN86018
Copper Nicke Seamless Pipe |
|||
|---|---|---|---|
| specification | DN | OD | S |
| inch | mm | mm | mm |
| 1/2 | 15 | 20 | 1 |
| 3/4 | 20 | 25 | 1.5 |
| 1 | 25 | 30 | 1.5 |
| 1 1/4 | 32 | 38 | 1.5 |
| 1 1/2 | 40 | 44.5 | 1.5 |
| 2 | 50 | 57 | 1.5 |
| 2 1/2 | 65 | 76 | 2 |
| 3 | 80 | 89 | 2 |
| 4 | 100 | 108 | 2.5 |
| 5 | 125 | 133 | 2.5 |
| 6 | 150 | 159 | 2.5 |
| 8 | 200 | 219 | 3 |
| 10 | 250 | 267 | 3 |
| 12 | 300 | 324 | 4 |
| 14 | 350 | 368 | 4 |
| 16 | 400 | 419 | 4 |
Copper Nicke Seam-welded Pipe |
|||
|---|---|---|---|
| specification | DN | OD | S |
| inch | mm | mm | mm |
| 18 | 450 | 457 | 4.5 |
| 20 | 500 | 508 | 5 |
| 24 | 600 | 610 | 5 |
| 28 | 700 | 711 | 6 |
| 32 | 800 | 813 | 6 |
| 36 | 900 | 914 | 8 |
Copper Nickel Pipe EEMUA234
| specification | DN | OD | S 16bar | S 20bar |
|---|---|---|---|---|
| inch | mm | mm | mm | mm |
| Copper Nickel Seamless Pipe | ||||
| 1/2 | 15 | 16 | 2 | 2 |
| 3/4 | 20 | 25 | 2 | 2 |
| 1 | 25 | 30 | 2.5 | 2.5 |
| 1 1/4 | 32 | 38 | 2.5 | 2.5 |
| 1 1/2 | 40 | 44.5 | 2.5 | 2.5 |
| 2 | 50 | 57 | 2.5 | 2.5 |
| 2 1/2 | 65 | 76.1 | 2.5 | 2.5 |
| 3 | 80 | 88.9 | 2.5 | 2.5 |
| 4 | 100 | 108 | 3 | 3 |
| 6 | 150 | 159 | 3 | 3.5 |
| 8 | 200 | 219.1 | 4 | 4.5 |
| 10 | 250 | 267 | 4.5 | 5.5 |
| 12 | 300 | 323.9 | 5.5 | 7 |
| 14 | 350 | 368 | 6.5 | 8 |
| 16 | 400 | 419 | 7 | 9 |
| Copper Nickel Seam-welded Pipe | ||||
| 18 | 450 | 457.2 | 8 | 9.5 |
| 20 | 500 | 508 | 8.5 | 11 |
| 24 | 600 | 610 | 10.5 | 13 |
| 28 | 700 | 711 | 12 | 15 |
| 32 | 800 | 813 | 13.5 | 17 |
| 36 | 900 | 914 | 15.5 | 19 |
Copper Nickel Pipe ASME B36.19M
| specification | DN | OD | S |
|---|---|---|---|
| inch | mm | mm | mm |
| Copper Nickel Seamless Pipe | |||
| 1/2 | 15 | 21.3 | 2.11 |
| 3/4 | 20 | 26.7 | 2.11 |
| 1 | 25 | 33.4 | 2.77 |
| 1 1/4 | 32 | 42.2 | 2.77 |
| 1 1/2 | 40 | 48.3 | 2.77 |
| 2 | 50 | 60.3 | 2.77 |
| 2 1/2 | 65 | 73 | 3.05 |
| 3 | 80 | 88.9 | 3.05 |
| 4 | 100 | 114.3 | 3.05 |
| 6 | 150 | 168.3 | 3.4 |
| 8 | 200 | 219.1 | 3.76 |
| 10 | 250 | 273 | 4.19 |
| 12 | 300 | 323.8 | 4.57 |
| 14 | 350 | 355.6 | 4.78 |
| 16 | 400 | 406.4 | 4.78 |
| Copper Nickel Seam-welded Pipe | |||
| 18 | 450 | 457 | 4.78 |
| 20 | 500 | 508 | 5.54 |
| 24 | 600 | 610 | 6.35 |
Why Engineers Choose Our CuNi Piping Systems
Our premium manufacturing techniques unlock unparalleled physical and mechanical properties that outperform alternative metallic materials in raw marine environments:
Natural Macro-Fouling Immunity: The steady, controlled release of copper ions naturally repels attachment from micro-organisms like barnacles, sea moss, and mollusks, preventing pipe diameter restrictions and bio-clogging.
Oxide Film Self-Healing: Iron and manganese concentrations accelerate the formation of a robust, protective crystalline surface film. This barrier continuously regenerates when exposed to rapid fluid shear or turbulences.
Immunity to Chloride SCC: Unlike standard stainless steel alloys, cupronickel remains entirely immune to chloride-induced Stress Corrosion Cracking (SCC) in warm, humid coastal air.
Exceptional Thermal Conductivity: Excellent thermodynamic behavior renders our tubes the absolute benchmark choice for condensators, marine evaporator systems, and heavy power-plant refrigeration circuits.
Frequently Asked Questions (FAQ)
Q1: Can your CuNi 90/10 pipes be seamlessly connected to CuNi 70/30 systems?
A: Yes, using appropriate TIG or MIG welding processes with matched filler wires (typically a 70/30 filler wire like ERCuNi is standard for both grades). This maintains the higher corrosion threshold at the junction point without compromising the circuit.
Q2: Why are EEMUA 144 metric sizes slightly different from ASTM B466 dimensions?
A: EEMUA 144 standards utilize true metric dimensions (e.g., OD 16mm or 38mm) designed specifically for European and offshore naval applications, whereas ASTM B466 follows standard nominal pipe dimensions based on historic ANSI sizes (e.g., OD 21.3mm or 33.4mm). Our mills maintain tooling lines for both standardizations.
Q3: What lengths do you standardly supply?
A: Our standard stock length is 6 meters (20 feet) for both seamless and welded segments. Customized cut-to-length options and matching forged elbows, flanges, and tees are available upon request.