The 1 inch CuNi 90/10 pipe is a premium copper-nickel alloy pipe designed for harsh environments where corrosion resistance, durability, and long service life are critical.

This alloy consists of approximately 90% copper and 10% nickel, with small additions of iron and manganese. It is widely recognized for its outstanding performance in seawater systems and industrial applications.

Thanks to its excellent anti-biofouling and seawater corrosion resistance, CuNi 90/10 pipe has become a preferred material for marine engineering, offshore platforms, desalination plants, and power generation systems.

Product Features

1. Excellent Corrosion Resistance

CuNi 90/10 pipe forms a thin, tightly adherent protective film after contact with clean seawater. This protective layer effectively resists seawater corrosion, pitting corrosion, crevice corrosion, and stress corrosion cracking. It can maintain high stability even in stagnant seawater environments.

2. High Mechanical Strength

The addition of nickel increases the alloy strength by approximately 30%, enabling the pipe to withstand higher internal pressure and impact loads.

3. Anti-Biofouling Performance

This alloy naturally resists the attachment of marine organisms, helping reduce maintenance costs and improve the operating efficiency of seawater piping systems.

4. Long Service Life and Low Maintenance Cost

Compared with carbon steel or standard stainless steel, CuNi pipe offers a significantly longer service life and requires minimal maintenance.

5. Excellent Fabrication Performance

Copper nickel pipe is easy to bend, flare, form, weld, and machine, making it suitable for complex piping systems.

6. High Thermal Conductivity

CuNi pipe provides efficient heat transfer, making it suitable for heat exchangers, condensers, and cooling systems.

7. Easy Processing and Installation

It retains the weldability, cutability, and formability of copper, making construction and installation convenient while reducing pretreatment procedures.

8. Environmentally Friendly and Sustainable

The alloy has a high recycling rate and meets the green development requirements of modern industry.

Key Technical Parameters

Manufacturing Process

1. Raw Material Selection

High-purity electrolytic copper with 99.99% purity and high-purity nickel are used. Impurity content is strictly controlled.

2. Vacuum Melting

Alloy melting is carried out under high-temperature vacuum conditions to avoid oxidation and ensure uniform chemical composition.

3. Continuous Casting

The molten alloy is formed into pipe billets by continuous casting equipment, ensuring stable grain structure and material consistency.

4. Heat Treatment

Solution treatment and aging treatment are applied to adjust the microstructure and improve strength and corrosion resistance.

5. Cold Drawing

Precise outer diameter, wall thickness, and smooth surface quality are achieved through cold drawing and cold working processes.

6. Surface Treatment

Pickling, polishing, or other surface treatments can be applied to improve cleanliness and oxidation resistance.

7. Quality Inspection

X-ray inspection, laser measurement, chemical analysis, and other inspection methods are used to ensure that every pipe meets the required standards.

Product Standards

Applications of Copper Nickel Pipe

Marine and Shipbuilding

Used in seawater cooling systems, fire-fighting pipelines, bilge and ballast water pipelines, and onboard sanitary systems.

Offshore Oil and Gas

Suitable for splash zone piping, topside cooling water circulation systems, and heat exchangers in desalination plants.

Power Generation

Applied in steam condenser tubes and auxiliary cooling water circuits in coastal power plants.

Cryogenic Engineering

Due to its excellent mechanical properties at sub-zero temperatures, CuNi 90/10 pipe is highly reliable for specialized cryogenic fluid transportation.

Packaging and Transportation

Packaging Method

Each pipe is packed in an anti-corrosion plastic sleeve and then placed in wooden cases or steel pallets to ensure moisture and rust protection.

Marking

Each pipe is marked with product code, such as CuNi 90/10, size, diameter × wall thickness, batch number, and production date.

Transportation Requirements

Pipes are transported in dry and well-ventilated containers. Direct sunlight and humid environments should be avoided.

Quality Assurance and Certification

Every foot of HAOMEI 1 inch CuNi 90/10 pipe undergoes strict non-destructive testing and mechanical testing to ensure compliance with global marine and industrial standards.

Available Tests and Certifications

100% eddy current testing / hydrostatic testing

Ultrasonic testing, UT, for wall integrity inspection

Spectral analysis to verify chemical composition

Third-party classification society certification available upon request, including DNV GL, ABS, CCS, and Lloyd's Register

FAQ

Q1: What is the difference between CuNi 90/10 and CuNi 70/30?

CuNi 90/10 offers better formability and cost efficiency, while CuNi 70/30 provides higher corrosion resistance under extremely harsh conditions.

Q2: Can you provide customized sizes?

Yes. We support customized diameter, wall thickness, length, and surface treatment according to project requirements.

Q3: Is it suitable for high-velocity seawater systems?

Yes. CuNi 90/10 alloy performs well under medium to high flow rates and offers good resistance to erosion corrosion.

Q4: Which standards do you follow?

We manufacture according to ASTM, ASME, EN, DIN, and other international standards.

Q5: Do you provide test certificates?

Yes. Mill Test Certificates, MTC, and third-party inspection reports are available upon request.