June 2025 – Shanghai, China — In the demanding world of industrial piping systems—where pressure, temperature, corrosion, and durability all converge—C70600 seamless copper nickel (CuNi) pipes have emerged as a reliable, long-term solution. Engineered specifically for high-temperature, high-pressure applications, these SCH80, 6-meter-length pipes are making headlines across sectors ranging from marine and desalination to power generation and chemical processing.
C70600, also known as 90/10 copper nickel, is a trusted alloy composed of 90% copper and 10% nickel, with trace additions of iron and manganese. This precise chemical composition offers an exceptional balance of corrosion resistance, mechanical strength, and thermal conductivity, making it a preferred choice for extreme working environments.
The Demands of High-Pressure, High-Temperature Environments
In environments such as offshore platforms, nuclear plants, desalination units, and heat exchanger systems, piping components face constant stress from high internal pressure and fluctuating temperatures. Materials must not only resist thermal expansion and pressure surges, but also corrosion from seawater, chlorinated water, and aggressive chemicals.
Standard steel pipes often fall short due to issues like scaling, pitting, and erosion under such harsh conditions. This is where C70600 CuNi pipes, especially in seamless SCH80 specification, outperform conventional options.
What Makes C70600 90/10 CuNi Unique?
C70600 copper nickel alloy boasts a number of properties that make it ideal for long-term use in demanding settings:
Excellent resistance to seawater corrosion, including biofouling and chloride-induced stress cracking.
High thermal and electrical conductivity, essential for heat exchange systems.
Good mechanical strength at both high and low temperatures.
Resistance to hydrogen embrittlement, an important feature in power plant environments.
Outstanding weldability and formability, allowing easy on-site fabrication.
Moreover, the addition of iron (1.5%) improves the alloy’s resistance to flowing seawater and erosion, a common issue in marine piping systems.
Seamless Pipes: Strength Without Compromise
The seamless manufacturing process—as opposed to welded pipes—results in a pipe with no longitudinal weld seam, thus eliminating the weakest point in the structure. This is particularly critical for high-pressure applications where any discontinuity can become a site for failure.
SCH80 (Schedule 80) pipes are characterized by their thick wall construction, allowing them to withstand higher pressures than Schedule 40 or thinner alternatives. With a standard length of 6 meters, these pipes offer installation efficiency and reduce the number of joints required—further minimizing leak risks and potential corrosion points.
Industrial Applications: Versatility Across Sectors
C70600 SCH80 seamless CuNi pipes are used in a wide range of applications where corrosion resistance and strength are paramount:
Marine and Shipbuilding: For seawater cooling, firefighting, bilge and ballast systems.
Desalination Plants: Ideal for brine and feedwater piping under high salinity conditions.
Power Generation: Used in condenser tubes, auxiliary systems, and turbine cooling.
Oil & Gas Platforms: For hydraulic systems and chemical injection lines in offshore rigs.
Chemical Processing: Effective in transporting acids and alkalis that degrade other alloys.
HVAC & Industrial Heat Exchangers: Leveraging thermal conductivity and biofouling resistance.
These industries benefit from the alloy’s long service life, minimal maintenance needs, and compatibility with other high-performance materials.
Manufacturing Standards and Quality Control
C70600 CuNi seamless pipes are manufactured in accordance with globally recognized standards:
ASTM B466 / B467: Covers seamless copper-nickel pipe and tube specifications.
EEMUA 234: Guidance for offshore and marine applications of copper-nickel alloys.
DIN 86019 and BS EN 12451: European standards for heat exchanger and condenser tubes.
Producers such as TOBO Industrial (Shanghai) Co., Ltd. implement rigorous quality control procedures including:
Hydrostatic pressure testing
Eddy current and ultrasonic testing
Chemical composition analysis
Dimensional inspection and wall thickness verification
All products are shipped with EN 10204 3.1/3.2 Material Test Certificates, and optional third-party inspections from TUV, SGS, or Lloyd’s Register are available.
Dimensions and Customization Options
C70600 seamless CuNi pipes can be manufactured to meet diverse project needs:
Outer Diameter: Ranging from 6mm to 300mm
Wall Thickness: SCH10 to SCH80 and heavier
Length: Standard 6 meters, with custom lengths available
End Finishes: Plain end, beveled end, threaded, or flanged
Surface: Bright annealed, pickled, or passivated
Additional fabrication options include U-bending, cutting, welding collars, and pre-insulated pipe sections.
Export and Global Demand
With rising global focus on sustainable infrastructure, clean water access, and energy efficiency, demand for durable piping systems like C70600 CuNi pipes is accelerating. China, with its expansive production capacity and competitive pricing, has become a major exporter of copper nickel pipes.
Key markets include:
Middle East (desalination, oil & gas)
Europe (marine, power plants)
North America (HVAC and shipbuilding)
Southeast Asia (industrial upgrades and coastal facilities)
TOBO and other top-tier Chinese manufacturers support FOB, CIF, and DDP shipping, with full customs documentation and logistics support.
Sustainable and Economical
Copper nickel is a 100% recyclable material, aligning with global environmental goals and circular economy principles. Its low maintenance requirements and extended service life—often exceeding 30–40 years—make it a cost-effective choice over the full project lifecycle.
Compared to materials like carbon steel, C70600 CuNi offers lower total ownership cost, particularly in applications with corrosive fluids, coastal exposure, or continuous operation.
Conclusion: A Modern Solution for Critical Systems
As industries continue to evolve toward more resilient, efficient, and environmentally responsible systems, C70600 90/10 seamless CuNi pipes provide a future-proof solution. With their high strength, corrosion resistance, and adaptability, these SCH80-grade pipes are ready to meet the rigorous challenges of modern engineering.
Whether beneath the sea or inside a power station, copper nickel continues to prove why it remains a top-tier choice for high-performance piping worldwide.