CuNi 70/30 Copper Nickel Pipe For Flange Service ASME B16.5 Seamless
CuNi 70/30 Copper Nickel Pipe For Flange Service ASME B16.5 Seamless
1.Product Description
Copper-nickel pipe is a wrought alloy tube made from copper with nickel, iron, and manganese. The two most common compositions are 90% copper / 10% nickel (CuNi 90/10) and 70% copper / 30% nickel (CuNi 70/30). These pipes are renowned for their outstanding resistance to flowing seawater, biofouling, and stress corrosion, making them the preferred choice for critical marine and industrial fluid systems.
2.Product Functions
-
Shipbuilding: Seawater cooling, bilge & ballast lines, sanitary systems.
-
Power Plants: Steam surface condensers, feedwater heaters, and turbine oil coolers.
-
Desalination: Multi-stage flash (MSF) and reverse osmosis pretreatment piping.
-
Offshore Oil & Gas: Hydraulic control lines, fire main systems, and platform drain lines.
-
Industrial: Brine heaters in salt production, chemical tank cleaning lines.
3.Product Advantages
-
Unmatched Seawater Corrosion Resistance: Performs in polluted, high-velocity, and turbulent seawater where many stainless steels fail.
-
Natural Biofouling Resistance: Reduces slime and barnacle attachment, lowering flow friction and cleaning frequency.
-
Excellent Weldability & Formability: Can be welded, brazed, bent, flared, and expanded without cracking.
-
High Resistance to Ammonia & Chlorides: Unaffected by typical chloride stress corrosion cracking.
-
Proven Longevity: Service life of 30–50 years in demanding marine environments.
4.Key Product Parameters
| Parameter | CuNi 90/10 (UNS C70600) | CuNi 70/30 (UNS C71500) |
| Nickel Content | 9.0 – 11.0% | 29.0 – 33.0% |
| Iron Content | 1.0 – 1.8% | 0.4 – 1.0% |
| Manganese Content | ≤ 1.0% | ≤ 1.0% |
| Tensile Strength (min) | 310 MPa (45 ksi) | 480 MPa (70 ksi) |
| Yield Strength (min) | 110 MPa (16 ksi) | 170 MPa (25 ksi) |
| Elongation (min) | 30% | 30% |
| Hardness (Rockwell B) | ≤ 80 HRB | ≤ 90 HRB |
| Thermal Conductivity | 45 W/(m·K) | 29 W/(m·K) |
| Electrical Resistivity | 19 µΩ·cm | 34 µΩ·cm |
| Density | 8.94 g/cm³ | 8.94 g/cm³ |
| Melting Range | 1100 – 1150°C | 1170 – 1240°C |
| Available OD Range | 6 – 610 mm | 6 – 610 mm |
| Max Operating Pressure | Up to 5000 psi (schedule dependent) | Up to 6000 psi (schedule dependent) |
FAQ
1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.