Copper Nickel Elbows
Copper Nickel Elbows are essential pipe fittings used to change flow direction in high-corrosion environments such as seawater piping systems. Made from 90/10 or 70/30 copper nickel alloy, these elbows provide excellent resistance to seawater corrosion, biofouling, erosion and stress corrosion cracking.
We supply high-performance Copper Nickel Elbows for shipbuilding, offshore platforms, desalination plants, seawater cooling systems, and marine piping networks. Available in 45°, 90°, and 180° configurations with long radius and short radius options.
- Material: UNS C70600 (90/10), C71500 (70/30)
- Elbow Types: 45°, 90°, 180° (LR / SR)
- Standards: ASTM, ASME, DIN, EN, EEMUA
- Certificates: MTC, PMI, Third-party Inspection
- Excellent resistance to seawater corrosion
- Ideal for marine, offshore, and desalination systems
- Seamless and welded production available
- Custom sizes, thickness, and bending radius supported
Project-ready Copper Nickel Elbows For seawater piping, shipbuilding, offshore platforms, desalination plants, and industrial cooling systems.
Compared with carbon steel fittings, copper nickel elbows provide significantly better resistance against chloride corrosion, erosion, and biofouling.
Copper Nickel Elbows for Seawater Piping Systems
In seawater service, ordinary carbon steel or stainless steel fittings may face corrosion, pitting or maintenance issues. Copper nickel alloy performs reliably in harsh marine environments because it forms a protective surface film when exposed to seawater.
Our Copper Nickel Elbows are designed to help piping systems change direction smoothly while maintaining good flow efficiency. They are suitable for cooling water systems, ballast systems, fire-fighting systems, bilge lines, desalination pipelines and offshore utility systems.
Copper Nickel Elbow Specifications
| Item | Description |
| Product Name | Copper Nickel Elbow, Copper Nickel Pipe Elbow, Cu-Ni Elbow |
| Material | C70600, C71500, CuNi 90/10, CuNi 70/30 |
| Angle | 45°, 90°, 180° |
| Radius | Long Radius, Short Radius |
| Size Range | Standard and customized sizes available |
| Manufacturing Type | Seamless or welded |
| Standards | ASME, ASTM, DIN, EN, EEMUA or project specifications |
| Surface | Pickled, cleaned, polished or as required |
| Application | Marine, offshore, desalination, shipbuilding, power plants |
Available Materials
We offer Copper Nickel Elbows in the following common grades:
| Material Grade | Alloy Type | Typical Use |
| C70600 | 90/10 Copper Nickel | Standard seawater piping, shipbuilding, marine cooling systems |
| C71500 | 70/30 Copper Nickel | Higher strength applications, offshore and more demanding seawater environments |
Both 90/10 and 70/30 copper nickel elbows offer strong corrosion resistance and good weldability. For most standard marine systems, C70600 is widely selected. For higher velocity seawater or more demanding conditions, C71500 may be preferred.
Copper Nickel Elbow Product Types
We supply a wide range of Copper Nickel Elbows for marine piping, shipbuilding, offshore platforms, seawater cooling systems and industrial pipeline projects. Our copper nickel pipe elbows are available in common angles, radius types, wall thicknesses and connection ends to meet project drawings and international standards.
90° Copper Nickel Elbows
Designed for right-angle direction changes in copper nickel piping systems, with long radius or short radius options available.
45° Copper Nickel Elbows
Suitable for smoother flow direction changes where lower pressure drop and compact piping layout are required.
180° Copper Nickel Return Elbows
Used for return flow applications and U-shaped pipeline configurations in seawater and heat exchanger systems.
Long Radius Copper Nickel Elbows
Long radius elbows help reduce flow resistance and are commonly used in marine, offshore and process piping systems.
Short Radius Copper Nickel Elbows
Short radius elbows are ideal for limited installation spaces while maintaining reliable corrosion resistance.
Seamless Copper Nickel Elbows
Manufactured without welded seams for demanding applications requiring excellent strength and uniform performance.
Welded Copper Nickel Elbows
Cost-effective welded copper nickel elbows can be produced for large sizes and customized project requirements.
Custom Copper Nickel Pipe Elbows
Customized sizes, wall thicknesses, angles and end connections can be made according to drawings or technical specifications.
Popular Copper Nickel Elbow Configurations
Different wall thicknesses, sizes, pressure ratings and end connections can be produced according to project drawings, material requirements or international standards. Contact us for technical support, quotation and customized copper nickel elbow solutions.
Copper Nickel Elbow Stock Dimensions & Weights
Copper Nickel Elbows are manufactured according to DIN 86090, EEMUA 234 and ASME B16.9 standards for marine, offshore and industrial piping systems. Available in 45° and 90° configurations, these elbows provide reliable flow direction changes while maintaining excellent corrosion resistance in seawater environments.
- Available in CuNi 90/10 and CuNi 70/30 materials
- 45° and 90° butt weld elbow configurations
- 1.0D, 1.5D and Long Radius (LR) designs
- Suitable for seawater, offshore and shipbuilding systems
- Dimensional and weight references for engineering design
Custom dimensions, wall thicknesses and project-specific requirements can be supplied upon request.
DIN 86090 Copper Nickel Butt Weld Elbows — 1.5D
DIN 86090 1.5D copper nickel elbows are widely used in shipbuilding, offshore platforms and seawater piping systems. The long radius design provides smoother flow transition and reduced pressure loss.
| specification | OD | S | a | ≈e | Weight | Weight | |
| 45° | 90° | ||||||
| inch | DN | mm | mm | mm | mm | kg | kg |
| 1/2 | 15 | 20 | 1 | 25 | 10.4 | 0.013 | 0.026 |
| 3/4 | 20 | 25 | 1.5 | 27.5 | 11.4 | 0.029 | 0.058 |
| 1 | 25 | 30 | 1.5 | 33.5 | 14 | 0.030 | 0.06 |
| 11/4 | 32 | 38 | 1.5 | 45 | 19 | 0.06 | 0.12 |
| 11/2 | 40 | 44.5 | 1.5 | 51 | 21 | 0.07 | 0.14 |
| 2 | 50 | 57 | 1.5 | 72 | 30 | 0.13 | 0.26 |
| 21/2 | 65 | 76 | 2 | 95 | 39 | 0.31 | 0.62 |
| 3 | 80 | 89 | 2 | 114.5 | 47 | 0.44 | 0.88 |
| 4 | 100 | 108 | 2.5 | 142.5 | 59 | 0.88 | 1.66 |
| 5 | 125 | 133 | 2.5 | 181 | 75 | 1.30 | 2.60 |
| 6 | 150 | 159 | 2.5 | 216 | 89 | 1.85 | 3.70 |
| 7 | 175 | 194 | 3 | 270 | 112 | 2.85 | 5.70 |
| 8 | 200 | 219 | 3 | 305 | 126 | 4.35 | 8.70 |
| 10 | 250 | 267 | 3 | 378 | 157 | 6.55 | 13.10 |
| 12 | 300 | 324 | 4 | 457 | 189 | 12.80 | 25.60 |
| 14 | 350 | 368 | 4 | 533.5 | 221 | 17.00 | 34.00 |
| 16 | 400 | 419 | 4 | 609.5 | 252 | 24.85 | 49.70 |
| 18 | 450 | 457 | 4.5 | 686 | 284 | 30.95 | 61.90 |
| 20 | 500 | 508 | 5 | 762 | 316 | 41.95 | 83.90 |
| 24 | 600 | 610 | 5 | 914 | 379 | 62.00 | 113.0 |
Typical Applications
Marine seawater cooling systems, ballast water systems, offshore fire-fighting pipelines, desalination plants and naval engineering projects.
DIN 86090 Copper Nickel Butt Weld Elbows — 1.0D
DIN 86090 1.0D elbows provide a compact solution where installation space is limited. The shorter radius design helps reduce piping layout requirements while maintaining excellent corrosion resistance.
| specification | OD | S | a | ≈e | Weight | Weight | |
| 45° | 90° | ||||||
| inch | DN | mm | mm | mm | mm | kg | kg |
| 1 | 25 | 30 | 1.5 | 30 | 12 | 0.027 | 0.054 |
| 11/4 | 32 | 38 | 1.5 | 32.5 | 14 | 0.033 | 0.076 |
| 11/2 | 40 | 44.5 | 1.5 | 40 | 17 | 0.057 | 0.144 |
| 2 | 50 | 57 | 1.5 | 52.5 | 22 | 0.10 | 0.20 |
| 21/2 | 65 | 76 | 2 | 70 | 29 | 0.23 | 0.46 |
| 3 | 80 | 89 | 2 | 82.5 | 34 | 0.32 | 0.65 |
| 4 | 100 | 108 | 2.5 | 100 | 41 | 0.58 | 1.16 |
| 5 | 125 | 133 | 2.5 | 125 | 52 | 0.90 | 1.80 |
| 6 | 150 | 159 | 2.5 | 150 | 62 | 1.30 | 2.60 |
| 7 | 175 | 194 | 3 | 180 | 75 | 1.90 | 3.80 |
| 8 | 200 | 219 | 3 | 210 | 87 | 3.00 | 6.00 |
| 10 | 250 | 267 | 3 | 255 | 106 | 4.44 | 8.88 |
| 12 | 300 | 324 | 4 | 305 | 126 | 8.55 | 17.10 |
| 14 | 350 | 368 | 4 | 352.5 | 146 | 11.30 | 22.60 |
| 16 | 400 | 419 | 4 | 400 | 166 | 16.40 | 32.80 |
| 18 | 450 | 457 | 4.5 | 455 | 189 | 20.45 | 40.90 |
| 20 | 500 | 508 | 5 | 505 | 210 | 28.10 | 56.20 |
| 24 | 600 | 610 | 5 | 610 | 253 | 45.00 | 90.00 |
Advantages of 1.0D Elbows
Ideal for machinery rooms, confined offshore structures, compact piping arrangements and retrofit projects.
EEMUA 234 Copper Nickel Elbows — Long Radius (LR)
EEMUA 234 copper nickel elbows are commonly specified for offshore and marine seawater systems. The standard includes dimensions suitable for 16 bar and 20 bar service conditions.
| specification | OD | S 16bar | S 20bar | a | ≈e | Weight 16bar | Weight 20bar | Weight 16bar | Weight 20bar |
| 90° | 90° | 45° | 45° | ||||||
| inch | mm | mm | mm | mm | mm | kg | kg | kg | kg |
| 1 | 30 | 2.5 | 2.5 | 38 | 22 | 0.12 | 0.12 | 0.06 | 0.06 |
| 11/4 | 38 | 2.5 | 2.5 | 48 | 25 | 0.13 | 0.13 | 0.09 | 0.09 |
| 11/2 | 44.5 | 2.5 | 2.5 | 57 | 29 | 0.30 | 0.30 | 0.15 | 0.15 |
| 2 | 57 | 2.5 | 2.5 | 76 | 35 | 0.52 | 0.52 | 0.25 | 0.25 |
| 21/2 | 76.1 | 2.5 | 2.5 | 95 | 44 | 0.90 | 0.90 | 0.45 | 0.45 |
| 3 | 88.9 | 2.5 | 2.5 | 114 | 51 | 1.25 | 1.25 | 0.65 | 0.65 |
| 4 | 108 | 3 | 3 | 152 | 64 | 2.10 | 2.10 | 1 | 1 |
| 6 | 159 | 3 | 3.5 | 229 | 95 | 4.70 | 5.50 | 2.30 | 2.70 |
| 8 | 219.1 | 4 | 4.5 | 305 | 127 | 12 | 13 | 6.00 | 6.50 |
| 10 | 267 | 4.5 | 5.5 | 381 | 159 | 20 | 24 | 10 | 12 |
| 12 | 323.9 | 5.5 | 7 | 457 | 190 | 35 | 45 | 17 | 23 |
| 14 | 368 | 6.5 | 8 | 533 | 222 | 55 | 67 | 27 | 34 |
| 16 | 419 | 7 | 9 | 610 | 254 | 77 | 99 | 38 | 50 |
| 18 | 457.2 | 8 | 9.5 | 686 | 286 | 109 | 128 | 54 | 64 |
| 20 | 508 | 8.5 | 11 | 762 | 318 | 142 | 184 | 71 | 92 |
| 24 | 610 | 10.5 | 13 | 914 | 381 | 252 | 312 | 126 | 156 |
| 28 | 711 | 12 | 15 | 1067 | 438 | 394 | 490 | 197 | 245 |
| 32 | 813 | 13.5 | 17 | 1219 | 502 | 579 | 725 | 289 | 362 |
| 36 | 914 | 15.5 | 19 | 1372 | 565 | 841 | 1026 | 420 | 513 |
Why EEMUA 234 Is Used Offshore
EEMUA 234 fittings are widely recognized in offshore oil and gas projects due to their proven reliability, dimensional consistency and compatibility with CuNi seawater piping systems.
ASME B16.9 Copper Nickel Butt Weld Elbows — 1.5D
ASME B16.9 copper nickel elbows are commonly used for international projects requiring compliance with ASME piping dimensional standards.
| DN | OD | s 10s | a | ≈e | Weight | Weight | |
| 45° | 90° | ||||||
| inch | mm | mm | mm | mm | mm | kg | kg |
| 1/2 | 15 | 21.3 | 2.11 | 38 | 16 | 0.035 | 0.07 |
| 3/4 | 20 | 26.7 | 2.11 | 38 | 19 | 0.04 | 0.08 |
| 1 | 25 | 33.4 | 2.77 | 38 | 22 | 0.065 | 0.13 |
| 11/4 | 32 | 42.2 | 2.77 | 48 | 25 | 0.075 | 0.15 |
| 11/2 | 40 | 48.3 | 2.77 | 57 | 29 | 0.17 | 0.33 |
| 2 | 50 | 60.3 | 2.77 | 76 | 35 | 0.29 | 0.58 |
| 21/2 | 65 | 73 | 3.05 | 95 | 44 | 0.55 | 1.1 |
| 3 | 80 | 88.9 | 3.05 | 114 | 51 | 0.77 | 1.53 |
| 4 | 100 | 114.3 | 3.05 | 152 | 64 | 1.07 | 2.13 |
| 6 | 150 | 168.3 | 3.4 | 229 | 95 | 2.75 | 5.50 |
| 8 | 200 | 219.1 | 3.76 | 305 | 127 | 5.64 | 11.28 |
| 10 | 250 | 273 | 4.19 | 381 | 159 | 9.3 | 18.6 |
| 12 | 300 | 323.8 | 4.57 | 457 | 190 | 14.54 | 29.08 |
| 14 | 350 | 355.6 | 4.78 | 533 | 222 | 20.2 | 40.45 |
| 16 | 400 | 406.4 | 4.78 | 610 | 254 | 26.29 | 52.58 |
| 18 | 450 | 457 | 4.78 | 686 | 286 | 32.57 | 65.13 |
| 20 | 500 | 508 | 5.54 | 762 | 318 | 46.28 | 92.55 |
| 24 | 600 | 610 | 6.35 | 914 | 381 | 76.20 | 152.4 |
Important Note
ASME B16.9 specifies dimensional requirements. Material grades are generally supplied according to ASTM B366, ASTM B466, UNS C70600, UNS C71500 or customer project specifications.
Key Advantages of Copper Nickel Elbows
Excellent Resistance to Seawater Corrosion
Copper nickel alloys perform exceptionally well in seawater environments, reducing the risk of corrosion-related failure in marine piping systems.
Natural Anti-Biofouling Performance
The alloy helps prevent marine organism growth on internal pipe surfaces, maintaining cleaner flow paths and improving long-term efficiency.
Good Weldability
Copper nickel elbows can be easily welded with matching pipes and fittings, supporting efficient installation in shipbuilding and offshore projects.
Long Service Life
Compared with conventional materials, copper nickel fittings reduce maintenance requirements and extend system lifecycle performance.
Stable Performance in Harsh Environments
These elbows maintain reliable performance in coastal, offshore, and high-humidity industrial conditions where corrosion resistance is critical.
Copper Nickel Elbows Applications in Marine & Industrial Systems
Copper Nickel Elbows are commonly used in:
- Shipbuilding and ship repair
- Offshore oil and gas platforms
- Seawater cooling systems
- Desalination plants
- Ballast water systems
- Fire water and sprinkler systems
- Bilge and drain systems
- Power plant cooling pipelines
- Coastal industrial facilities
- Marine HVAC systems
For marine and offshore projects, material traceability, dimensional accuracy and clean surface condition are important. We can provide inspection documents and test reports according to order requirements.
Why Choose Our Copper Nickel Elbows
Copper Nickel Elbows are widely used in seawater piping systems where corrosion resistance, reliability, and long service life are critical. We supply elbows tailored for engineering projects that require stable performance under marine and offshore conditions.
Our production is flexible and can be aligned with customer drawings, international standards, or specific project requirements for shipbuilding, desalination plants, and offshore installations.
Key advantages include:
- Copper Nickel 90/10 and 70/30 materials available for different seawater conditions
- Full range of standard sizes with custom dimensions supported
- Precision forming ensures accurate angles and dimensional consistency
- Smooth internal surface designed to reduce flow resistance and scaling risk
- Proven suitability for seawater, offshore, and marine engineering environments
- Mill test certificates (MTC) and inspection reports available upon request
- Export-grade packaging designed for long-distance sea and air transportation
From shipbuilding pipelines to offshore platforms and desalination systems, our Copper Nickel Elbows are supplied with attention to material selection, compliance, and long-term operating stability.
Copper Nickel Elbows Quality Control
We apply strict quality control throughout the entire production process—from raw material selection to final packaging. Each stage is monitored to ensure consistency, compliance with project specifications, and long-term performance in service.
Depending on customer requirements and applicable standards, inspections can include:
- Dimensional inspection to ensure accurate tolerances and fit-up
- Visual inspection for surface condition, defects, and workmanship
- Chemical composition analysis to verify material grade compliance
- Mechanical property testing such as tensile strength and hardness
- PMI (Positive Material Identification) testing for material traceability
- Hydrostatic testing for pressure integrity where applicable
- NDT (Non-Destructive Testing) including ultrasonic or radiographic inspection
- Review of material test certificates (MTC) for full documentation traceability
After inspection, all fittings are carefully cleaned, protected, and securely packed to minimize the risk of surface damage during transportation and storage.
Copper Nickel Elbows Manufacturer and Supplier
As a supplier of Copper Nickel Elbows, we understand that marine and industrial piping projects require both reliable quality and timely delivery. Our elbows are used in seawater pipelines where safety, corrosion resistance and long-term performance matter.
If you are looking for 90/10 Copper Nickel Elbows, 70/30 Copper Nickel Elbows or custom Cu-Ni pipe fittings, please send us your size, quantity, material grade and standard. Our team will provide a quotation and technical support based on your project requirements.
FAQ About Copper Nickel Elbows
What are Copper Nickel Elbows used for?
Copper Nickel Elbows are used to change the direction of copper nickel piping systems. They are commonly installed in seawater cooling systems, shipbuilding pipelines, offshore platforms, desalination plants and marine fire-fighting systems.
What is the difference between 90/10 and 70/30 Copper Nickel Elbows?
90/10 copper nickel elbows contain about 90% copper and 10% nickel, making them suitable for most standard seawater applications. 70/30 copper nickel elbows contain higher nickel content and offer greater strength and resistance in more demanding marine environments.
Are Copper Nickel Elbows suitable for seawater?
Yes. Copper nickel alloy is widely used in seawater piping because it offers excellent corrosion resistance, biofouling resistance and long service life.
Can you supply custom Copper Nickel Elbows?
Yes. Custom sizes, wall thicknesses, angles, standards and drawings can be produced according to project requirements.
What information is needed for a quotation?
Please provide the material grade, size, wall thickness, elbow angle, radius, standard, quantity and any inspection requirements. If available, technical drawings are also helpful.
How do I request a quote?
Looking for reliable Copper Nickel Elbows for your marine or industrial piping project? Contact us with your specifications, and we will provide a competitive quotation with suitable technical support.
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