Products Description
Our Advantages
1. Seawater Corrosion Resistance
- SB111 C71500 Copper Nickel Pipes exhibit excellent resistance to seawater corrosion, resisting fouling by algae and marine organisms. The annual corrosion rate is only 0.008~0.015 mm/year, ensuring a long service life in offshore and coastal environments.
- The pipes undergo ASTM G48 corrosion resistance testing to ensure their seawater corrosion resistance meets the ASTM B111 international standard specifications.
2. High Deep-Sea Pressure Resistance
- C71500, also known as a 70/30 copper-nickel alloy, has a yield strength of ≥ 125 MPa and a tensile strength of ≥ 360 MPa in the annealed state, maintaining structural integrity under high external hydrostatic pressure and internal system pressure.
- The pipes are manufactured using a cold-rolling process, resulting in uniform wall thickness. Our SB111 C71500 Copper Nickel Pipes undergo rigorous mechanical testing and dimensional inspection, and are verified for high-pressure strength according to API 5L standards, meeting the pressure rating requirements for various deep-sea conditions.
3. High Heat Transfer Efficiency
- Compared to stainless steel and alloy steel materials, C71500 copper-nickel alloy has higher thermal conductivity, and in seawater environments, C71500 forms a thin, stable oxide layer, maintaining the pipe's high heat transfer performance, making it ideal for condensers and heat exchangers.
- Our pipes undergo pickling and passivation, as well as cold-rolling processes, resulting in a high degree of surface smoothness that improves the pipe's efficient heat transfer.
4. Quality Control
- Our pipes undergo rigorous testing from raw materials to finished product packaging, including spectral analysis, online dimensional inspection, mechanical performance testing, and non-destructive testing, ensuring compliance with ASTM standards.
- We provide authoritative third-party testing reports from SGS, BV, DNV, etc., and complete packaging and labeling to ensure traceability of the production process.
5. Customized Services
- In addition to ASTM standards, we can provide international standards such as EN, DIN, JIS, and ISO according to customer requirements; we support non-standard customization, and can customize dimensions according to customer needs.
- We offer surface treatment methods such as electroplating, hot-dip galvanizing, and chemical plating; we support pipe bending, U-tube forming, cutting, end face processing, chamfering, and deburring services.
application areas
- Seawater piping systems: Used for cooling water, ballast water, fire fighting water, and general seawater environments.
- Condensers and heat exchangers: For power plants, refineries, and chemical plants.
- Offshore oil and gas platforms: Suitable for cooling systems, seawater risers, and fire fighting systems, applicable to high-velocity seawater environments.
- Shipbuilding and marine engineering: Used in seawater piping, coolers, evaporators, and auxiliary systems on commercial and naval vessels.
- Seawater desalination plants: Suitable for seawater intake lines, brine heaters, and heat recovery systems.
- Petrochemicals: Used in heat exchangers and piping requiring corrosion resistance.
- Marine energy systems: Used in seawater cooling and heat exchange systems for offshore wind, tidal, and ocean energy equipment.
Chemical Composition
| Element | Cu | Ni | Fe | Mn | Zn | Pb | Others |
|---|---|---|---|---|---|---|---|
| C70600 | Balance | 9.0 – 11.0 | 1.0 – 1.8 | ≤ 1.0 | ≤ 1.0 | ≤ 0.05 | ≤ 0.05 each |
| C71500 | Balance | 29.0 – 33.0 | 0.4 – 1.0 | 0.5 – 1.0 | ≤ 1.0 | ≤ 0.05 | ≤ 0.05 each |
| C72200 | Balance | 16.0 – 18.0 | 0.6 – 1.1 | 0.5 – 1.0 | ≤ 1.0 | ≤ 0.05 | ≤ 0.05 each |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | Density (g/cm³) |
| C70600 | ≥ 275 | ≥ 105 | ≥ 30 | ~80 | ~8.9 |
| C71500 | ≥ 360 | ≥ 125 | ≥ 30 | ~90 | ~8.94 |
| C72200 | ≥ 350 | ≥ 120 | ≥ 30 | ~90 | ~8.9 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| C68700 | Aluminum brass, with its good heat transfer properties and low cost, is suitable for condenser and heat exchanger tubes in moderate seawater conditions. |
| Titanium Grade 2 | It is resistant to seawater and chloride corrosion and biofouling, making it suitable for highly corrosive environments. |
| Duplex Stainless Steels | It possesses high strength and good resistance to stress corrosion cracking, making it suitable for high-pressure seawater systems. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What are the main application areas of ASTM SB111 C71500 copper-nickel tubes?
A: C71500 pipes are widely used in seawater cooling systems, heat exchangers, condensers, offshore platforms, shipbuilding, desalination plants, and coastal power plants.
Q: Why choose C71500 instead of C70600 (90/10 Cu-Ni)?
A: C71500 offers higher mechanical strength and better erosion-corrosion resistance, making it suitable for high-pressure and high-flow rate systems, such as deep-sea, offshore, and heavy-duty heat exchanger applications.
Q: Which standards do your C71500 copper-nickel tubes comply with?
A: Our pipes are manufactured in full compliance with ASTM SB111 / ASME SB111 standards. We can also meet EN, JIS, or customer-specific standards if required, and provide EN 10204 3.1 mill test certificates for international projects.
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