90° Long Radius Copper Nickel Elbow
A 90° Long Radius Copper Nickel Elbow is designed to change the direction of fluid flow by 90 degrees while minimizing pressure loss and turbulence. Compared with short radius elbows, the long radius design offers smoother flow characteristics, making it the preferred choice for marine piping, offshore platforms, desalination plants, shipbuilding, and seawater cooling systems.
Our 90° LR Copper Nickel Elbows are manufactured using premium 90/10 Copper Nickel (C70600) and 70/30 Copper Nickel (C71500) alloys, providing exceptional resistance to seawater corrosion, biofouling, erosion, and chloride attack.
Whether your project requires ASTM, ASME, DIN, EN, or custom specifications, we supply reliable copper nickel fittings that meet demanding industrial environments.
- Product: 90° LR Copper Nickel Elbow
- Material: CuNi 90/10, CuNi 70/30
- Radius: Long Radius, usually 1.5D
- Connection: Butt Weld
- Use: Seawater and marine piping
- Custom sizes and drawings available
90° Long Radius Copper Nickel Elbow
90° Long Radius Copper Nickel Elbow Specifications
| Item | Description |
| Product | 90° Long Radius Copper Nickel Elbow |
| Type | Seamless / Welded |
| Radius | Long Radius (1.5D) |
| Angle | 90° |
| Material | C70600, C71500 |
| Standard | ASME, DIN, EN, JIS or project drawings |
| Size | 1/2"–48" (DN15–DN1200) |
| Wall Thickness | SCH 10–SCH XXS |
| Surface | Pickled, Cleaned, Shot Blasted |
| Connection | Butt Weld |
| Inspection | PMI, Hydro Test, UT, Eddy Current |
Custom dimensions are available according to project drawings.
Why Choose a 90° Long Radius Copper Nickel Elbow?
In marine and seawater piping systems, the geometry of the elbow plays a critical role in how smoothly the medium flows. A 90° long radius copper nickel elbow is engineered to minimize resistance and support stable hydraulic performance over long-term operation.
Engineering Advantages
- Helps maintain stable flow with significantly reduced pressure loss
- Minimizes internal turbulence at directional changes
- Reduces localized wear caused by high-velocity seawater
- Supports extended service intervals in offshore environments
- Improves overall pump and system energy efficiency
- Strong resistance to seawater corrosion and biofouling conditions
- Decreases maintenance frequency and lifecycle cost
- Reliable for continuous-duty marine and offshore applications
Compared with standard radius fittings, the long radius 90° design is better suited for systems where flow stability, durability, and corrosion resistance are critical to long-term performance, especially in seawater transport pipelines.
90° LR Copper-Nickel Elbow Material Options
Our production covers the most commonly specified copper-nickel alloys used in marine and offshore piping systems. Each grade is selected based on service conditions, seawater exposure, and project requirements.
| Alloy Designation | Industry Description | Typical Service Environment |
| UNS C70600 | Cu-Ni 90/10 | Marine ship systems, seawater distribution pipelines |
| UNS C71500 | Cu-Ni 70/30 | Offshore engineering, desalination facilities, naval applications |
Both alloy types are widely adopted for long-term operation in seawater environments, offering stable corrosion resistance and reliable performance in demanding marine conditions.
90° LR Copper-Nickel Elbow Chemical Composition
90/10 (UNS C70600) LR Copper-Nickel Elbow Chemical Composition
| KME CuNi90/10 | DIN 17664 2.0882 | BS 2871 CN102 | ASTM B466 C70600 | JIS H3300 C7060T | DIN 86019 2.1972 | EEMUA 234 UNS 7060X | GB/T 5231 BFe10-1.6-1 | |
| Ni% | 10.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 | 9.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 |
| Fe% | 1.5-1.8 | 1.0-2.0 | 1.0-2.0 | 1.0-1.8 | 1.0-1.8 | 1.5-1.8 | 1.5-2.0 | 1.5-1.8 |
| Mn% | 0.6-1.0 | 0.5-1.0 | 0.5-1.0 | max.1.0 | 0.2-1.0 | 0.5-1.0 | 0.5-1.0 | 0.5-1.0 |
| C% | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | |
| Pb% | max.0.01 | max.0.03 | max.0.01 | max.0.02 | max.0.05 | max.0.01 | max.0.01 | max.0.03 |
| S% | max.0.005 | max.0.02 | max.0.05 | max.0.02 | max.0.005 | max.0.02 | max.0.01 | |
| P% | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | ||
| Zn% | max.0.05 | max.0.50 | max.0.50 | max.0.50 | max.0.05 | max.0.20 | max.0.20 | |
| Other | max.0.20 | max.0.30 | max.0.20 | max.0.30 | max.0.40 | |||
| Cu% | rem. | rem. | rem. | rem. | +Ni+Fe+Mn min99.5 | rem. | rem. | rem. |
70/30 (UNS C71500) LR Copper-Nickel Elbow Chemical Composition
| KME CuNi70/30 | DIN 176642.0882 | BS 2871 CN107 | ASTM B466C71500 | JIS H3300C7150T | |
| Ni% | 30.0-32.0 | 30.0-32.0 | 30.0-32.0 | 29.0-33.0 | 29.0-33.0 |
| Fe% | 0.47-0.7 | 0.4-1.0 | 0.4-1.0 | 0.4-1.0 | 0.4-1.0 |
| Mn% | 0.5-1.0 | 0.5-1.5 | 0.5-1.5 | max.1.0 | 0.2-1.0 |
| C% | max.0.04 | max.0.05 | max.0.06 | max.0.05 | |
| Pb% | max.0.01 | max.0.03 | max.0.01 | max.0.02 | max.0.05 |
| S% | max.0.01 | max.0.02 | max.0.08 | max.0.02 | |
| P% | max.0.02 | max.0.02 | max.0.02 | ||
| Zn% | max.0.20 | max.0.50 | max.0.50 | max.0.50 | |
| Other | max.0.30 | max.0.30 | |||
| Cu% | rem. | rem. | rem. | rem. | +Ni+Fe+Mn min99.5 |
Choosing Between CuNi 90/10 and CuNi 70/30 for Marine Service
Copper-nickel alloys are both proven solutions for seawater piping, but their performance characteristics differ enough to influence material selection. The decision should be based on actual operating conditions such as seawater velocity, contamination level, system pressure, and long-term maintenance expectations.
CuNi 90/10 (UNS C70600)
CuNi 90/10 (C70600) is widely used in standard marine and offshore piping systems where seawater conditions are relatively stable. It provides reliable resistance to corrosion, along with good formability and weldability for fabrication work.
Typical applications include ship seawater circuits, ballast piping, cooling water systems, fire protection networks, and general coastal infrastructure projects.
CuNi 70/30 (UNS C71500)
CuNi 70/30 (C71500) contains a higher nickel ratio, making it more suitable for aggressive seawater environments where higher flow speeds, suspended particles, or increased corrosion risk are expected.
It is commonly specified for offshore platforms, desalination facilities, and heavy-duty marine systems that require extended service life under challenging conditions.
Not sure which alloy fits your project requirements? Share your operating pressure, temperature range, fluid conditions, and drawings with our engineering team. We can evaluate your application and recommend the most suitable material solution. Get technical support and quotation.
90° LR Copper Nickel Elbow Applications
Thanks to their outstanding resistance to seawater corrosion and chloride-rich environments, 90° Long Radius Copper Nickel Elbows are a trusted choice in demanding marine and industrial piping networks.
They are commonly selected in systems where long service life, stable flow performance, and reduced maintenance are critical.
- Shipbuilding and vessel construction
- Offshore oil and gas production platforms
- Seawater intake and cooling circuits
- Heat exchanger piping networks
- Fire protection and sprinkler systems
- LNG receiving and processing terminals
- Desalination and water treatment plants
- Thermal and nuclear power facilities
- Marine engineering projects
- Naval and defense applications
In seawater transport lines, inferior fittings can quickly lead to corrosion damage, leakage risks, and unexpected shutdowns. This is why copper nickel alloys are widely specified in marine-grade piping standards across shipyards and offshore installations.
Typical system components used alongside include pipes, tees, reducers, flanges, and couplings, allowing engineers to build a fully compatible and corrosion-resistant piping network.
Recommended matching components
Copper Nickel Pipe Copper Nickel Tee Copper Nickel Reducer Copper Nickel Flange
90° Long Radius Copper Nickel Elbow Manufacturing Process
Every elbow is produced under strict quality control.
Our production process includes:
- Raw material inspection
- Pipe forming
- Hot or cold bending
- Welding if required
- Heat treatment
- Surface cleaning
- Dimensional inspection
- PMI testing
- Hydrostatic testing
- Eddy current testing
- Final inspection
- Packaging
Third-party inspections from SGS, BV, DNV, ABS, or TUV are available upon request.
HC Quality Assurance for Every 90° LR Copper Nickel Elbow
Every 90° LR Copper Nickel Elbow is manufactured under a documented quality control process to ensure reliable performance in marine, offshore, desalination and industrial piping systems. Inspection procedures can be customized to comply with project specifications, international standards, or third-party requirements before shipment.
Standard Inspection Items
- Verification of raw material certificates
- Dimensional inspection according to applicable standards
- Visual examination of weld preparation and surface finish
- Wall thickness measurement at critical locations
- Positive Material Identification (PMI) when specified
- Hydrostatic or pressure testing where project requirements apply
- Final packaging and marking inspection before dispatch
Available Quality Documentation
Complete inspection records can be supplied together with each shipment, providing full material traceability and supporting customer quality assurance requirements.
- EN 10204 3.1 Material Test Certificate (MTC)
- Dimensional Inspection Report
- Positive Material Identification (PMI) Report
- Hydrostatic or Pressure Test Report
- Chemical Composition Report (when requested)
- Mechanical Property Test Report (optional)
- Packing List and Shipping Mark Verification
- Third-Party Inspection Support (SGS, BV, TUV, DNV, ABS, etc.)
Why Choose Our Copper Nickel Pipe Fittings Supplier?
Choosing the right supplier is just as important as selecting the correct copper nickel alloy. We combine stable manufacturing capability, strict quality control, and responsive customer service to support marine, offshore, and industrial piping projects worldwide.
- Wide range of copper nickel pipe fittings available in common and custom sizes
- Manufacturing according to ASTM, ASME, ANSI, EN and customer specifications
- Flexible OEM and custom fabrication based on drawings or project requirements
- Complete material traceability with EN 10204 inspection certificates available
- Strict quality inspections from raw material to final shipment
- Reliable production schedules for urgent and large-volume orders
- Export experience serving shipyards, EPC contractors and offshore projects worldwide
- Technical support for material selection, dimensions and application recommendations
From a single replacement fitting to complete piping packages, our team delivers consistent product quality, dependable lead times and professional support throughout your project.
Custom Copper Nickel Elbow Manufacturing & OEM Services
We manufacture both standard and custom copper nickel elbows for marine, offshore, shipbuilding, desalination and industrial piping systems. From prototype quantities to high-volume production, our engineering team can produce elbows according to international standards or your project drawings, helping ensure compatibility with existing piping systems.
In addition to standard dimensions, we offer flexible manufacturing for special sizes, wall thicknesses, bending radius, material grades and inspection requirements to meet the specifications of different projects.
Information Required for a Quotation
- Product type (90° LR, 45°, 180°, reducing elbow, etc.)
- Copper nickel grade (UNS C70600, UNS C71500 or equivalent)
- Outside diameter, wall thickness and schedule
- Manufacturing standard or technical drawing
- Order quantity
- End connection requirements
- Application or operating environment
- Inspection, testing and certification requirements
Get a Quote for 90° Long Radius Copper Nickel Elbow
If you are looking for a dependable 90° Long Radius Copper Nickel Elbow or 90° LR Copper Nickel Elbow for seawater piping, marine equipment or offshore engineering, contact us today. We will help you choose the right copper nickel fitting for your project and provide competitive pricing with reliable quality.
Contact Us for Copper Nickel Elbow PriceAfter receiving your specifications, our technical sales team will review the requirements and provide a detailed quotation, recommended material solution, production lead time and inspection options based on your project needs.
FAQ – 90° Long Radius Copper Nickel Elbow
What is a 90° Long Radius Copper Nickel Elbow?
It is a copper nickel pipe fitting designed to change the direction of a pipeline by 90°. The long radius design, typically 1.5D, helps reduce flow resistance, pressure loss, and turbulence in marine and seawater piping systems.
Which materials are available?
We supply elbows in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500). CuNi 90/10 is widely used for general seawater service, while CuNi 70/30 offers higher strength and better corrosion resistance for more demanding marine environments.
Is the elbow suitable for seawater service?
Yes. Copper nickel alloys provide excellent resistance to seawater corrosion, marine biofouling, and erosion, making them an ideal choice for long-term marine and offshore applications.
Can you manufacture custom sizes?
Yes. We manufacture according to ASTM, ASME, DIN, EN, JIS, and customer drawings. Custom dimensions, wall thicknesses, and special project requirements are all supported.
Where is this elbow commonly used?
It is widely used in shipbuilding pipelines, offshore platforms, seawater cooling systems, firefighting systems, ballast and bilge systems, heat exchanger piping, and desalination plants.
Further reading: Copper Nickel PipesCopper Nickel ElbowsCopper Nickel TeesCopper Nickel ReducerCopper Nickel Pipe CapCopper Nickel FlangesCopper Nickel Threaded Pipe Fittings