1" CuNi 90/10 Pipe
A 1" CuNi 90/10 Pipe is widely used in seawater piping systems where long service life, stable performance and resistance to marine corrosion are required. Made from copper nickel 90/10 alloy, also known as UNS C70600, this pipe offers excellent resistance to saltwater, biofouling and stress corrosion, making it a reliable choice for shipbuilding, offshore platforms, desalination plants and coastal industrial projects.
For projects that involve continuous seawater flow, CuNi 90/10 is often preferred over carbon steel and many stainless steels because it forms a protective surface film in marine environments. This helps reduce maintenance costs and improves the overall reliability of the piping system.
1" CuNi 90/10 Pipe Specifications
The 1 inch CuNi 90/10 pipe is available in seamless or welded form, depending on project requirements. Standard sizes, wall thicknesses and pressure ratings can be supplied according to ASTM, ASME, DIN, EEMUA, EN or customer drawings.
| Item | Description |
| Product Name | 1" CuNi 90/10 Pipe |
| Material Grade | CuNi 90/10 / Copper Nickel 90/10 |
| UNS Number | C70600 |
| Nominal Size | 1 inch / NPS 1 |
| Outside Diameter | 1.315" / 33.4 mm |
| Type | Seamless or welded pipe |
| Standards | ASTM B466, ASME SB466, EN, DIN, EEMUA, JIS available |
| Common Wall Thickness | SCH 10, SCH 40, SCH 80, or customized |
| Surface | Pickled, bright, mill finish |
| Application | Seawater, marine, offshore, condenser, heat exchanger, cooling water systems |
Chemical Composition of CuNi 90/10 C70600
CuNi 90/10 is a copper-based alloy with around 10% nickel and small additions of iron and manganese. The iron content is important because it improves resistance to impingement attack in flowing seawater.
| Element | Content |
| Copper Cu | Balance |
| Nickel Ni + Cobalt Co | 9.0 – 11.0% |
| Iron Fe | 1.0 – 1.8% |
| Manganese Mn | Max 1.0% |
| Zinc Zn | Max 1.0% |
| Lead Pb | Max 0.05% |
| Other Elements | As per standard |
Why Choose 1" CuNi 90/10 Pipe?
A 1" CuNi 90/10 Pipe is commonly selected for small and medium seawater lines because it combines good mechanical strength with excellent corrosion resistance. It performs especially well where pipes are exposed to chloride-rich water, marine atmosphere or brackish water.
Key advantages include:
- Excellent resistance to seawater corrosion
- Good resistance to biofouling and marine organism attachment
- Suitable for high-flow seawater systems
- Good weldability and fabricability
- Long service life with low maintenance
- Stable performance in offshore and shipboard environments
- Better erosion-corrosion resistance than ordinary copper pipe
- Suitable for both new construction and repair projects
1" CuNi 90/10 Pipe Common Applications
- Shipbuilding seawater pipelines
- Offshore platform piping
- Ballast water systems
- Fire water systems
- Bilge and cooling water lines
- Desalination plant piping
- Heat exchanger and condenser connections
- Power plant cooling systems
- Coastal chemical plant pipelines
- Marine hydraulic and service water systems
In shipyards, 1" CuNi 90/10 Pipe is often used for branch lines, pump connections and compact piping layouts where corrosion resistance and easy installation are both important.
CuNi 90/10 Copper Nickel Pipe Sizes and Wall Thickness
We supply CuNi 90/10 copper nickel pipes in a wide range of sizes for shipbuilding, offshore platforms, desalination plants, heat exchangers and seawater piping systems. In addition to standard dimensions, customized pipe sizes and wall thicknesses can be produced according to project drawings, pressure requirements and applicable standards.
Available Size Range
- NPS 1/2" to 24"
- Outside diameter: 6 mm to 610 mm
- Wall thickness: SCH 10, SCH 20, SCH 40, SCH 80
- Custom wall thickness based on engineering drawings
- Cut-to-length copper nickel pipe available
- Straight lengths or bundled supply for bulk orders
Common grades include CuNi 90/10, also known as C70600 copper nickel alloy, which offers excellent resistance to seawater corrosion, biofouling and erosion. It is widely used in marine piping, condenser tubes, cooling water systems and fire-fighting pipelines.
Popular 1" CuNi 90/10 Pipe Options
- CuNi 90/10 Pipe 1" / DN25
- Outside diameter: 30 mm
- Pressure rating options: 16 bar and 20 bar
- Suitable for seawater service, marine systems and industrial piping projects
If your project requires a specific pressure rating, flange connection, welding procedure or inspection standard, our technical team can help confirm the proper pipe size, wall thickness and material specification before production. Please provide your drawing, quantity and application details for a fast quotation.
Manufacturing Standards for 1" CuNi 90/10 Pipe
Our 1" CuNi 90/10 pipe, also known as 90/10 copper nickel pipe or C70600 pipe, can be supplied in accordance with major international standards. It is widely used in seawater pipelines, shipbuilding, offshore platforms, desalination systems, heat exchangers and other marine engineering applications where corrosion resistance and long service life are required.
Popular Standards for 1" CuNi 90/10 Pipe
- DIN 86019 / DIN 86018 – commonly used for copper nickel piping systems in marine and shipbuilding projects
- EEMUA 234 – suitable for project-specific copper nickel pipe requirements in offshore and seawater service
- ASME B36.19M – used for pipe dimensions and wall thickness requirements
- ASTM B466 / B466M – seamless copper nickel pipe and tube
- ASTM B467 / B467M – welded copper nickel pipe
- ASME SB466 / SB467 – copper nickel pipe for pressure vessel and engineering applications
- EEMUA 144 – copper nickel piping systems for marine service
- EN 12449 – seamless round copper and copper alloy tubes
- JIS and other project standards – available according to customer drawings or technical specifications
Quality Documents and Inspection
Each shipment of 1" CuNi 90/10 pipe can be supplied with material test certificates, including chemical composition, mechanical properties, dimensional inspection and other required test results. EN 10204 3.1 certificates are available on request.
Third-party inspection can also be arranged before delivery. We regularly work with inspection agencies such as SGS, BV, ABS, DNV, LR and other approved organizations, depending on project requirements.
Custom Requirements
If your project requires a specific pipe size, wall thickness, length, end type, testing method or packing standard, our team can provide CuNi 90/10 pipes according to your technical documents, drawings or purchase specifications.
CuNi 90/10 Pipe Testing and Quality Control
Every batch of 1" CuNi 90/10 Pipe is inspected before delivery to ensure dimensional accuracy and material compliance.
Available inspections include:
- Chemical composition analysis
- Mechanical property testing
- Hydrostatic test
- Eddy current test
- Visual and dimensional inspection
- PMI testing
- Flattening or flaring test
- Surface quality inspection
- Certificate according to EN 10204 3.1 or 3.2
CuNi 90/10 Pipe Packing and Delivery
Typical packing methods:
- Waterproof film wrapping
- Wooden box or plywood case
- Steel strip bundle packing
- Export-standard seaworthy packaging
- Custom marking with heat number, size and standard
Delivery time depends on quantity, size and whether the product is in stock. Standard 1 inch CuNi 90/10 pipe is often available with shorter lead time.
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