70/30 copper nickel pipe, also known as C71500 copper nickel pipe, CuNi 70/30 pipe or CuNi30Mn1Fe pipe, containing approximately 70% copper and 30% nickel， is a copper nickel alloy pipe designed for seawater service and harsh marine environments. The higher nickel content gives the alloy improved mechanical strength and enhanced resistance to erosion corrosion compared with 90/10 copper nickel， especially in more demanding seawater and offshore environments.

C71500 copper nickel pipe performs well in high-velocity seawater and aggressive marine conditions. It forms a protective surface film in seawater, helping reduce corrosion rates and extend the service life of piping systems. Because of its excellent corrosion resistance, good weldability and reliable long-term performance, 70/30 copper nickel pipe is commonly selected for offshore platforms, naval vessels, desalination units, heat exchangers and critical seawater piping systems. We supply 70/30 copper nickel pipes in seamless and welded types according to ASTM, EN, EEMUA, DIN and customer project specifications.

Material Grade and Equivalent Names

Typical Chemical Composition of C71500

Available Types of 70/30 Copper Nickel Pipe

We supply 70/30 copper nickel C71500 pipes in different forms for marine, offshore and industrial applications.

Standards for 70/30 Copper Nickel Pipe C71500

Our 70/30 copper nickel pipes can be supplied according to international standards and customer project requirements.

Common standards include:

• ASTM B466 – Seamless copper nickel pipe and tube

• ASTM B467 – Welded copper nickel pipe

• ASTM B111 – Copper nickel tubes for heat exchangers and condensers

• EEMUA 144 – Copper nickel piping systems

• EN 12449 – Copper and copper alloy seamless tubes

• EN 12451 – Copper and copper alloy seamless round tubes

DIN marine piping standards, if required by project specification

Customer drawings and project specifications

General Supply Range

Difference Between 70/30 and 90/10 Copper Nickel Pipe

Both 70/30 and 90/10 copper nickel pipes are widely used in marine seawater piping systems. The main difference is the nickel content, strength and resistance to more severe service conditions.

70/30 copper nickel pipe C71500 is recommended when the piping system requires higher strength, better erosion resistance or improved performance in more demanding seawater environments. 90/10 copper nickel pipe C70600 is more commonly used for general marine seawater systems where good corrosion resistance and cost efficiency are required.

Matching Copper Nickel Pipe Fittings

We can supply complete copper nickel piping components for C71500 70/30 pipe systems, including:

• Copper nickel elbows

• Copper nickel tees

• Copper nickel reducers

• Copper nickel flanges

• Copper nickel caps

• Copper nickel stub ends

• Copper nickel couplings

• Copper nickel unions

• Fabricated copper nickel pipe spools

Custom copper nickel fittings according to drawings

Supplying pipes, fittings and flanges together helps ensure material compatibility, dimensional accuracy and efficient project installation.

Quality Control and Inspection

To ensure reliable performance in marine, offshore and seawater environments, our 70/30 copper nickel C71500 pipes can be inspected and tested according to applicable standards and customer requirements.

Available inspections include:

• Chemical composition analysis

• Mechanical property test

• Visual inspection

• Dimensional inspection

• Wall thickness inspection

• Surface quality inspection

• Hydrostatic test

• Eddy current test

• Ultrasonic test

• PMI material verification

• Flattening test

• Flaring test

• Weld inspection for welded pipes

• Material test certificate

• Third-party inspection

• Classification society inspection if required

Packaging and Delivery

70/30 copper nickel pipes are carefully packed to prevent damage, deformation, scratching and contamination during transportation. Standard export packaging includes wooden cases, wooden pallets, plastic wrapping, end protection and seaworthy packing.

For long pipes, the pipes are bundled securely and protected with waterproof material. Pipe ends can be protected with caps or covers according to customer requirements.

Why Choose Us for 70/30 Copper Nickel Pipe C71500?

• Supply seamless and welded C71500 copper nickel pipes

• Available in 70/30 and 90/10 copper nickel grades

• Products manufactured according to ASTM, EN, EEMUA and project standards

• Suitable for marine, offshore, desalination and heat exchanger applications

• Matching copper nickel fittings and flanges can be supplied together

• Custom sizes, fixed lengths and fabricated pipe spools are available

• Strict quality control and inspection process

• Export seaworthy packaging for safe shipment

• Technical support for marine and offshore copper nickel piping projects

Request a Quote for 70/30 Copper Nickel Pipe C71500

Please send us your required material grade, standard, pipe type, outside diameter, wall thickness, length, quantity and inspection requirements. If you have drawings or project specifications, please send them to us for a fast quotation.