High Pressure CuNi 70/30 Copper Nickel Elbow, 90° LR Butt Weld ASME B16.9 for Marine Piping
High Pressure CuNi 70/30 Copper Nickel Elbow, 90° LR Butt Weld ASME B16.9 for Marine Piping
1.Product Description
The Copper Nickel Elbow is a high-performance seamless pipe fitting made from cupronickel alloys (Cu-Ni), primarily grades C70600 (90/10) and C71500 (70/30). Manufactured by hot pushing or cold forming followed by solution annealing, it features a homogeneous grain structure, excellent dimensional accuracy, and smooth internal surfaces. All products comply with ASME B16.9, ASTM B466/B467, DIN 86090, and EEMUA 146, ensuring global interchangeability and reliability.
2.Product Applications
These elbows are specifically designed for corrosive and high‑flow environments. Major applications include:
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Marine piping (ballast, cooling, fire‑fighting, bilge)
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Offshore platforms and subsea pipelines
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Seawater intake and brine lines in desalination plants
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Condenser and heat exchanger connections in power stations
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Chemical and acid‑resistant process lines
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Shipbuilding and port infrastructure
3 · Product Advantages
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Outstanding seawater resistance – Corrosion rate < 0.025 mm/year; no SCC or pitting.
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Biofouling prevention – Copper ions inhibit barnacle and algae attachment.
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High‑velocity tolerance – Safe for flow velocities up to 4‑5 m/s (seawater).
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Easy fabrication – Excellent weldability (TIG/MIG) without preheat; bendable and machinable.
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Long service life – Expected lifetime > 30 years in marine environments.
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Low maintenance – Reduces downtime and replacement costs.
4.Key Product Specifications
| Parameter | Value |
| Material Grades | UNS C70600 (90/10 CuNi), UNS C71500 (70/30 CuNi), BFe10-1-1 |
| Chemical Composition (90/10) | Cu ≥86.0%, Ni 9.0-11.0%, Fe 1.0-1.8%, Mn 0.5-1.0% |
| Chemical Composition (70/30) | Cu ≥63.0%, Ni 29.0-33.0% |
| Size Range | DN15 – DN600 (½″ – 24″); larger upon request |
| Wall Thickness Series | Sch10, Sch20, Sch40, Sch80, Sch160 |
| Bend Angles | 45°, 90°, 180° (custom angles available) |
| Bend Radius Ratio | Long Radius (LR) R=1.5D; Short Radius (SR) R=1.0D; 2D / 4D optional |
| Pressure Class | Class 150, 300, 600, 900; PN6 – PN40 |
| Temperature Range | -50℃ ~ +300℃ |
| Tensile Strength (annealed) | ≥295 MPa (90/10: ~359 MPa) |
| Hardness (annealed) | ≤90 HRB |
| End Connections | Butt-weld (BW), Socket-weld (SW), Threaded (NPT/BSPT) |
| Applicable Standards | ASME B16.9, ASTM B466, ASTM B467, DIN 86090, EEMUA 146, GB/T 12459, MSS-SP-119 |
FAQ
1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.
2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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