Copper Nickel Pipes & Tubes Supplier and Manufacturer in India
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Table of Contents
- Specification of Copper Nickel Pipes & Tubes
- Types of Copper Nickel Pipes & Tubes
- Copper Nickel (CuNi Pipe) Composition Chart
- Mechanical Property Comparison
- Copper Nickel Pipe Dimensional Tolerances
- Pressure Rating
- Applications of Copper Nickel Pipes & Tubes
- Testing and Documentation
- Copper Nickel Grades We Supply
- Frequently Asked Questions
Kalpataru Piping Solution offers copper nickel pipes and tubes in 90/10 and 70/30 grades (Grade 90 and Grade 70) in accordance to ASTM B466 and ASME SB466 respectively for seawater and marine piping systems. Both grades are seamless and welded, and are available in 1/2” to 24” NB and SCH 10 to SCH 80. Most seawater piping is specified as Copper Nickel 90/10, which has excellent corrosion resistance and is relatively easy to fabricate; in cases where greater velocity, higher temperature and/or erosion resistance are required, Copper Nickel 70/30 is used. Each order for copper nickel pipe and tube includes a certificate of mill analysis, verifying the chemical composition and mechanical properties of the material, prior to shipment.
Specification of Copper Nickel Pipes & Tubes
| Category | Details |
| Standard | ASTM B466, B467 / ASME SB466, SB467 |
| Size Range | 1/2 inch to 24 inch NB |
| Schedule | SCH 10 to SCH 80, STD, XS |
| Form | Seamless, welded |
| Testing | MTC to EN 10204 3.1, PMI on request, hydrostatic and NDT |
Copper Nickel (CuNi Pipe) Composition Chart
|
Grade |
Cu |
Ni |
Fe |
Mn |
|
Cu-Ni 90-10 (UNS C70600) |
Balance |
9-11 |
1.0-1.8 |
1.0 max |
|
Cu-Ni 70-30 (UNS C71500) |
Balance |
29-33 |
0.4-1.0 |
1.0 max |
Full grade detail: Cu-Ni 90-10 Pipes & Tubes and Cu-Ni 70-30 Pipes & Tubes.
Mechanical Property Comparison
Comparative tensile, yield, fatigue and burst strength across the two grades and a reference carbon steel baseline, for engineers sizing a schedule against service pressure.
|
Property |
CuNi 90/10 |
CuNi 70/30 |
Reference Carbon Steel |
|
Tensile Strength (min) |
275 MPa |
365 MPa |
415 MPa |
|
Yield Strength (min) |
105 MPa |
125 MPa |
240 MPa |
|
Elongation (min) |
30% |
30% |
22% |
Copper Nickel Pipe Dimensional Tolerances
Typical tolerances per ASTM B466 for seamless copper nickel pipe. Confirm against the specific size and schedule before finalizing a drawing.
|
Dimension |
Typical Tolerance |
|
Outside Diameter |
plus or minus 0.40%, 0.40mm minimum |
|
Wall Thickness |
plus 22%, minus 0% (average wall) |
|
Length (cut to length) |
plus 6mm, minus 0mm |
Types of Copper Nickel Pipes Tubes
Pressure Rating
Burst pressure for a given size and schedule can be estimated using: P = 2ST / D, where S is minimum tensile strength, T is nominal wall thickness, and D is outside diameter. Use this alongside the weight calculator to size a schedule quickly, or contact us for a size-specific pressure rating sheet. The same rating applies equally to heat exchanger tube of the same wall thickness.
Applications of Copper Nickel Pipes & Tubes
- Offshore Oil & Gas Industry
- Desalination Industry
- Marine & Shipbuilding Industry
- Power Generation Industry
- Heat Exchanger Manufacturing Industry
Testing and Documentation
Every copper nickel pipe and tube order ships with a mill test certificate to EN 10204 3.1. PMI testing, hydrostatic testing and third-party inspection are available on request.
Copper Nickel Grades We Supply
- Copper Nickel 90/10 (UNS C70600), approximately 90 percent copper and 10 percent nickel with small additions of iron and manganese. Offers excellent resistance to seawater corrosion, good thermal conductivity, and easy fabrication. See Copper Nickel 90/10 Pipes & Tubes for the full grade-specific spec sheet.
- Copper Nickel 70/30 (UNS C71500), approximately 70 percent copper and 30 percent nickel. Provides higher strength and superior resistance to erosion and oxidation, for higher velocity and higher temperature service. See Copper Nickel 70/30 Pipes & Tubes for the full grade-specific spec sheet.
Frequently Asked Questions
What is the difference between marine grade and industrial grade Copper Nickel pipe?
Marine grade 70/30 Copper Nickel is used for harsh seawater applications, while industrial grade 90/10 Copper Nickel is suitable for general seawater and industrial piping.
Do Copper Nickel pipes need cathodic protection?
No. Copper Nickel pipes are naturally resistant to seawater corrosion and usually do not require cathodic protection.
What documentation comes with a Copper Nickel pipe order?
Each order includes an EN 10204 3.1 Mill Test Certificate (MTC). PMI testing and third-party inspection are available on request.
What sizes and schedules are available?
Copper Nickel pipes and tubes are available from 1/2 inch to 24 inch NB in SCH 10 to SCH 80, in seamless and welded forms.
Why is Copper Nickel preferred over carbon steel for seawater piping?
Copper Nickel offers excellent resistance to seawater corrosion, erosion, and biofouling, making it more durable than carbon steel.
How do I choose between 90/10 and 70/30 for a new project?
Choose 90/10 for standard seawater applications and 70/30 for higher flow rates, higher temperatures, and more demanding marine environments.
