A Copper Nickel Reducer is a critical butt-weld fitting used to connect pipes of different diameters in seawater systems, offshore piping networks, shipbuilding, desalination plants, and marine cooling circuits. Designed for high corrosion resistance and long service life, copper nickel reducers are widely selected where carbon steel or stainless steel fittings fail under aggressive marine conditions.
We supply concentric reducers and eccentric reducers in CuNi 90/10 C70600 and CuNi 70/30 C71500 materials. As a leading manufacturer of high-performance marine fittings, we supply premium-grade CuNi reducers engineered to withstand high velocity and turbulent seafloor or topside environments.
- Concentric reducer
- Eccentric reducer
- DIN 86089: DN15-DN500, 10 bar, 14 bar
- EEMUA 146 / EEMUA 234: DN15-DN500, 16 bar, 20 bar
- ASME B16.9: 1/2″-24″, Sch5s-Sch80s
- CuNi 90/10 C70600 and CuNi 70/30 C71500
Copper Nickel Reducer Specification
| Specification Item | Details |
| Product Name | Copper Nickel Reducer |
| Reducer Types | Concentric Reducer, Eccentric Reducer |
| Manufacturing Standards | ASME B16.9, DIN 86089, EEMUA 146, EEMUA 234 |
| Size Range | 1/2" to 24" (NPS), DN15 to DN500 |
| Construction Type | Seamless, Welded, Fabricated |
| Wall Thickness | SCH 5S, SCH 10S, SCH 20, SCH 40S, SCH 80S, SCH 160, XS, XXS |
| Pressure Ratings | 10 Bar, 14 Bar, 16 Bar, 20 Bar |
| Material Grades | Copper Nickel 90/10 (UNS C70600), Copper Nickel 70/30 (UNS C71500), CuNi10Fe1.6Mn, UNS 7060X |
| Material Standard | ASTM B466, EEMUA 145, DIN Marine Specifications |
| Reducer Configuration | Concentric, Eccentric |
| Connection Type | Butt Weld |
| End Preparation | Plain End (PE), Beveled End (BE), Customized Ends |
| Surface Condition | Pickled, Cleaned, Degreased, Shot Blasted |
| Manufacturing Process | Hot Formed, Cold Formed, Hydraulic Forming, Welded Fabrication |
| Inspection & Testing | Visual Inspection, Dimensional Inspection, PMI, Hydrostatic Testing, NDT Available |
| Certification | EN 10204 3.1, Mill Test Certificate (MTC), Third-Party Inspection Available |
| Origin | China |
| Application Temperature | Suitable for Low and Moderate Temperature Service |
| Customization | Available According to Customer Drawings and Project Specifications |
Types of Copper Nickel Reducers
Copper Nickel Concentric Reducer
A Copper Nickel Concentric Reducer is designed with both ends aligned on a common centerline, creating a smooth and balanced transition between different pipe diameters. This configuration helps maintain consistent flow characteristics throughout the piping system.
Concentric reducers are widely used in vertical piping installations, seawater cooling systems, offshore process lines, and marine engineering applications where maintaining symmetrical flow is important. The gradual reduction in pipe size helps minimize flow disturbance and supports stable operating conditions.
Typical Applications: Vertical pipelines, seawater circulation systems, fire protection networks, desalination plants, and process piping requiring uniform flow distribution.
Key Advantages: Smooth flow transition, reduced pressure loss, lower turbulence levels, and improved hydraulic efficiency across the pipe size change.
Copper Nickel Eccentric Reducer
A Copper Nickel Eccentric Reducer features offset centerlines between the larger and smaller pipe ends. This design is commonly selected for horizontal piping systems where maintaining a level pipe invert or top line is critical.
By eliminating high or low points within the pipeline, eccentric reducers help prevent the formation of air pockets, vapor accumulation, or liquid stagnation. This makes them particularly suitable for pump suction lines, ballast water systems, and drainage applications found in marine and offshore environments.
Typical Applications: Horizontal pipelines, pump suction systems, ballast water lines, cooling water networks, and drainage systems.
Key Advantages: Reduces the risk of cavitation, prevents trapped air or fluid buildup, improves system reliability, and supports efficient fluid transport in horizontal installations.
Copper Nickel Reducer Standards
Our Copper Nickel Reducers are manufactured in accordance with internationally recognized marine and industrial piping standards, including DIN 86089, EEMUA 146, EEMUA 234, and ASME B16.9. These standards ensure dimensional accuracy, pressure integrity, and full compatibility with copper nickel piping systems used in shipbuilding, offshore platforms, seawater cooling networks, desalination plants, and naval engineering projects.
We offer both Concentric Reducers and Eccentric Reducers in CuNi 90/10 (C70600) and CuNi 70/30 (C71500) grades to meet various flow and installation requirements.
DIN 86089 Copper Nickel Reducers
- DIN 86089 Copper Nickel Concentric Reducer
- DIN 86089 Copper Nickel Eccentric Reducer
DIN 86089 reducers are widely used in marine piping systems and shipbuilding applications, providing reliable dimensional consistency and excellent seawater corrosion resistance.
EEMUA 146 Copper Nickel Reducers
- EEMUA 146 Copper Nickel Concentric Reducer
- EEMUA 146 Copper Nickel Eccentric Reducer
Manufactured to EEMUA 146 requirements, these reducers are commonly specified for offshore installations, seawater services, ballast water systems, and fire-fighting pipelines.
EEMUA 234 Copper Nickel Reducers
- EEMUA 234 Copper Nickel Concentric Reducer
- EEMUA 234 Copper Nickel Eccentric Reducer
EEMUA 234 copper nickel reducers are designed for demanding marine and offshore environments where long service life, low maintenance, and superior resistance to biofouling are essential.
ASME B16.9 Copper Nickel Reducers
- ASME B16.9 Copper Nickel Concentric Reducer
- ASME B16.9 Copper Nickel Eccentric Reducer
ASME B16.9 reducers are suitable for industrial piping systems requiring standardized butt weld fittings and seamless integration with international pressure piping specifications.
All Copper Nickel Reducers can be supplied in seamless or welded construction, with customized dimensions, wall thicknesses, pressure ratings, and inspection documentation available upon request.
Material Grade Comparison: CuNi 90/10 vs. CuNi 70/30
Copper nickel reducers are commonly manufactured in two marine-grade alloys: CuNi 90/10 (C70600) and CuNi 70/30 (C71500). Both materials offer excellent resistance to seawater corrosion and marine biofouling, but they are designed for different service conditions.
| Property | CuNi 90/10 (C70600) | CuNi 70/30 (C71500) |
| Nickel Content | 10% | 30% |
| Corrosion Resistance | Excellent | Excellent |
| Erosion Resistance | Good | Superior |
| Mechanical Strength | Good | Higher |
| High-Velocity Seawater Service | Suitable | Recommended |
| Typical Applications | Commercial marine piping, ballast systems, heat exchangers | Offshore platforms, naval vessels, firemain systems, desalination plants |
| Cost | More economical | Higher |
CuNi 90/10 (C70600)
CuNi 90/10 is the most widely used copper nickel alloy for marine piping systems. It combines excellent seawater corrosion resistance, good weldability and cost-effective performance, making it suitable for shipbuilding, seawater cooling systems and general offshore applications.
CuNi 70/30 (C71500)
With a higher nickel content, CuNi 70/30 provides greater mechanical strength and improved resistance to erosion-corrosion in high-velocity seawater. It is commonly selected for demanding offshore, naval and industrial marine environments where extended service life is required.
Copper Nickel Reducer Chemical Composition
90/10 (UNS C70600) Copper Nickel Reducer 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) Copper Nickel Reducer 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 |
Key Benefits of Copper Nickel Reducers in Marine Piping Systems
Copper nickel reducers are widely used in seawater and marine piping systems due to their outstanding resistance to corrosion, erosion, and biological fouling. Compared with conventional steel fittings, CuNi reducers provide longer service life, reduced maintenance requirements, and improved reliability in demanding offshore and coastal environments.
Exceptional Seawater Corrosion Resistance
Copper nickel alloys naturally develop a protective oxide layer when exposed to seawater, providing excellent resistance to general corrosion, pitting, and crevice corrosion. This makes them ideal for long-term operation in marine environments.
Superior Resistance to Erosion and Impingement
In high-velocity seawater systems, copper nickel reducers maintain structural integrity and resist erosion-corrosion damage caused by turbulent flow, suspended solids, and impingement effects.
Natural Protection Against Marine Biofouling
Copper nickel materials possess inherent anti-fouling properties that help inhibit the attachment of marine organisms, algae, and barnacles, reducing cleaning frequency and maintaining system efficiency.
Extended Service Life with Lower Maintenance Costs
The combination of corrosion resistance and mechanical durability significantly extends operational life, minimizing downtime, replacement frequency, and lifecycle costs for marine piping installations.
Excellent Weldability and Fabrication Performance
Copper nickel reducers can be readily welded to CuNi piping systems, ensuring reliable joints and facilitating efficient fabrication of prefabricated pipe spools for shipbuilding and offshore projects.
Proven Performance in Critical Marine Applications
Copper nickel reducers are extensively used in shipbuilding, offshore platforms, FPSOs, desalination plants, seawater cooling systems, and coastal power stations where reliability and corrosion resistance are essential.
Applications of Copper Nickel Reducers in Marine and Industrial Piping Systems
Copper nickel reducers are widely used in piping systems where excellent seawater corrosion resistance, long service life, and reliable flow transition are required. They are particularly suitable for marine and industrial environments exposed to saltwater, high humidity, and demanding operating conditions.
- Shipbuilding and Marine Vessels – Used in seawater cooling systems, ballast water pipelines, fire-fighting networks, bilge systems, and other onboard piping applications where corrosion resistance is critical.
- Offshore Oil & Gas Platforms – Installed in seawater intake, cooling water, and utility piping systems operating under harsh offshore conditions with continuous seawater exposure.
- Seawater Desalination Plants – Ideal for desalination facilities due to their resistance to chloride attack, biofouling, and erosion caused by high-velocity seawater flow.
- Power Generation Facilities – Commonly used in condenser cooling circuits, heat exchanger connections, and seawater cooling water systems in coastal power plants.
- Naval and Defense Applications – Specified for naval vessels and military marine projects requiring long-term reliability, low maintenance requirements, and proven seawater performance.
- Chemical Processing and Industrial Plants – Suitable for process piping systems handling corrosive fluids, cooling water, and other applications where durability and operational safety are essential.
Available in both concentric and eccentric configurations, copper nickel reducers provide smooth flow transitions while maintaining the corrosion-resistant performance required in marine, offshore, and industrial piping systems.
Copper Nickel Reducer Quality and Inspection
All copper nickel reducers are inspected throughout production to ensure compliance with marine, offshore, and industrial piping requirements. Inspection records and material documentation are available for complete project traceability.
- 100% raw material verification with heat number traceability
- Material Test Certificates (MTC EN 10204 3.1) supplied upon request
- Positive Material Identification (PMI) testing available for CuNi 90/10 and CuNi 70/30 grades
- Dimensional inspection performed according to DIN 86089, EEMUA and ASME standards
- Visual examination for surface quality, weld integrity and workmanship
- Wall thickness, end preparation and tolerance verification before shipment
- Third-party inspection by SGS, BV, DNV, ABS or Lloyd's Register available
- Complete inspection reports and project documentation support
- Export-grade seaworthy packing for international transportation
How to Request a Quote for Copper Nickel Reducers
To ensure an accurate quotation and efficient production scheduling, please provide the technical specifications, material grade, dimensional requirements, and inspection standards for your copper nickel reducer. Complete project information helps our engineering team recommend the most suitable solution for marine, offshore, shipbuilding, and seawater piping applications.
Information Required for Quotation
- Standard: DIN 86089, EEMUA 146, EEMUA 234, ASME B16.9, or customer drawing.
- Reducer Type: Concentric Reducer or Eccentric Reducer.
- Size: Nominal pipe size and reduction dimensions (e.g. DN150 × DN100 or 6" × 4").
- Wall Thickness / Pressure Rating: SCH 10S, SCH 40S, SCH 80S, 10 Bar, 14 Bar, 16 Bar, 20 Bar, etc.
- Material Grade: CuNi 90/10 (UNS C70600) or CuNi 70/30 (UNS C71500).
- Quantity Required: Total number of pieces for each size.
- Certification Requirements: EN 10204 3.1 certificate, material test report (MTR), pressure test report, third-party inspection, or classification society approval if required.
- Application Environment: Shipbuilding, offshore platform, seawater cooling system, desalination plant, naval vessel, or industrial piping system.
Quotation Example: Copper Nickel Concentric Reducer, ASME B16.9, 6" × 4", SCH 10S, ASTM B366 UNS C70600, EN 10204 3.1 Certificate, Quantity: 20 Pieces, Application: Seawater Cooling Pipeline.
Haomei Copper Nickel Reducer Stock
Copper-Nickel Butt-Weld Reducers DIN 86089 Stock
| Specification | OD1XOD2 | S1XS2 | L | Weight | |
| inch | DN | mm | mm | mm | kg |
| 1/2"x3/8" | 15x10 | 20x16 | 1x1 | 30 | 0.015 |
| 3/4"x3/8" | 20x10 | 25x16 | 1.5x1 | 30 | 0.020 |
| 3/4"×1/2" | 20x15 | 25×20 | 1.5x1 | 30 | 0.023 |
| 1"x3/8" | 25x10 | 30x16 | 1.5x1 | 35 | 0.030 |
| 1"x1/2" | 25x15 | 30x20 | 1.5x1 | 35 | 0.033 |
| 1"x3/4" | 25x20 | 30x25 | 1.5x1.5 | 35 | 0.035 |
| 11/4"x3/8" | 32x10 | 38x16 | 1.5x1 | 50 | 0.038 |
| 11/4"x1/2" | 32x15 | 38x20 | 1.5x1 | 50 | 0.040 |
| 11/4"x3/4" | 32x20 | 38x25 | 1.5x1.5 | 50 | 0.043 |
| 11/4"x1" | 32x25 | 38x30 | 1.5x1.5 | 50 | 0.045 |
| 11/2"x1/2" | 40x15 | 44.5×20 | 1.5x1 | 80 | 0.05 |
| 11/2"x3/4" | 40x20 | 44.5x25 | 1.5x1.5 | 80 | 0.06 |
| 11/2"x1" | 40x25 | 44.5x30 | 1.5x1.5 | 80 | 0.07 |
| 11/2"x11/4" | 40x32 | 44.5x38 | 1.5x1.5 | 80 | 0.08 |
| 2"x3/4" | 50x20 | 57x25 | 1.5x1.5 | 80 | 0.11 |
| 2"x1" | 50x25 | 57x30 | 1.5x1.5 | 80 | 0.12 |
| 2"×11/4" | 50x32 | 57x38 | 1.5x1.5 | 80 | 0.14 |
| 2"×11/2" | 50x40 | 57x44.5 | 1.5x1.5 | 80 | 0.16 |
| 21/2"x1" | 65×25 | 76x30 | 2x1.5 | 90 | 0.25 |
| 21/2"x11/4" | 65x32 | 76x38 | 2x1.5 | 90 | 0.27 |
| 21/2"x11/2" | 65x40 | 76x44.5 | 2x1.5 | 90 | 0.30 |
| 21/2"x2" | 65x50 | 76x57 | 2x1.5 | 90 | 0.33 |
| 3"x11/4" | 80x32 | 89x38 | 2x1.5 | 90 | 0.46 |
| 3"x11/2" | 80x40 | 89×44.5 | 2x1.5 | 90 | 0.48 |
| 3"x2" | 80x50 | 89x57 | 2×1.5 | 90 | 0.49 |
| 3"x11/2" | 80x65 | 89x76 | 2x2 | 90 | 0.51 |
| 4"x11/2" | 100x40 | 108x44.5 | 2.5x1.5 | 100 | 0.58 |
| 4"x2" | 100x50 | 108x57 | 2.5x1.5 | 100 | 0.60 |
| 4"x21/2" | 100x65 | 108x76 | 2.5x2 | 100 | 0.66 |
| 4"x3" | 100x80 | 108x89 | 2.5x2 | 100 | 0.72 |
| 5"x2" | 125x50 | 133x57 | 2.5x1.5 | 140 | 0.86 |
| 5"x21/2" | 125×65 | 133x76 | 2.5×2 | 140 | 0.90 |
| 5"x3" | 125x80 | 133x89 | 2.5x2 | 140 | 0.94 |
| 5"x4" | 125x100 | 133x108 | 2.5x2.5 | 140 | 0.98 |
| 6"x21/2" | 150x65 | 159x76 | 2.5x2 | 150 | 1.16 |
| 6"x3" | 150x80 | 159x89 | 2.5x2 | 150 | 1.25 |
| 6"x4" | 150x100 | 159x108 | 2.5x2.5 | 150 | 1.37 |
| 6"x5" | 150x125 | 159x133 | 2.5x2.5 | 150 | 1.70 |
| 7"x3" | 175x80 | 194x89 | 3x2 | 155 | 1.94 |
| 7"x4" | 175x100 | 194x108 | 3x2.5 | 155 | 1.96 |
| 7"x5" | 175x125 | 194x133 | 3x2.5 | 155 | 2.01 |
| 7"x6" | 175x150 | 194x159 | 3x2.5 | 155 | 2.08 |
| 8"x4" | 200×100 | 219x108 | 3x2.5 | 155 | 2.55 |
| 8"x5" | 200x125 | 219x133 | 3x2.5 | 155 | 2.64 |
| 8"x6" | 200x150 | 219x159 | 3x2.5 | 155 | 2.73 |
| 8"x7" | 200x175 | 219x194 | 3x3 | 155 | 2.82 |
| 10"x5" | 250x125 | 267x133 | 3x2.5 | 210 | 4.42 |
| 10"x6" | 250x150 | 267x159 | 3x2.5 | 210 | 4.53 |
| 10"x7" | 250x175 | 267x194 | 3x3 | 210 | 4.63 |
| 10"x8" | 250x200 | 267x219 | 3x3 | 210 | 4.78 |
| 12"x5" | 300x125 | 324x133 | 4x2.5 | 210 | 7.12 |
| 12"x6" | 300x150 | 324x159 | 4x2.5 | 210 | 7.20 |
| 12"x7" | 300x175 | 324x194 | 4x3 | 210 | 7.28 |
| 12"x8" | 300×200 | 324×219 | 4x3 | 210 | 7.40 |
| 12"x10" | 300×250 | 324×267 | 4x3 | 210 | 7.55 |
| 14"x6" | 350x150 | 368x159 | 4x3 | 300 | 10.75 |
| 14"x7" | 350x175 | 368x194 | 4x3 | 300 | 11.05 |
| 14"x8" | 350x200 | 368x219 | 4x3 | 300 | 11.40 |
| 14"x10" | 350x250 | 368x267 | 4x3 | 300 | 11.80 |
| 14"×12" | 350x300 | 368x324 | 4x4 | 300 | 12.20 |
| 16"x7" | 400x175 | 419x194 | 4x3 | 325 | 12.90 |
| 16"x8" | 400x200 | 419×219 | 4×3 | 325 | 13.40 |
| 16"x10" | 400x250 | 419x267 | 4x3 | 325 | 13.90 |
| 16"x12" | 400x300 | 419x324 | 4x4 | 325 | 14.40 |
| 16"x14" | 400x350 | 419×368 | 4x4 | 325 | 15.10 |
| 18"x8" | 450x200 | 457x219 | 4.5x3 | 350 | 17.09 |
| 18"×10" | 450x250 | 457x267 | 4.5x3 | 350 | 17.60 |
| 18"x12" | 450x300 | 457x324 | 4.5x4 | 350 | 18.19 |
| 18"x14" | 450x350 | 457x368 | 4.5x4 | 350 | 18.95 |
| 18"×16" | 450x400 | 457x419 | 4.5x4 | 350 | 19.90 |
| 20"x10" | 500x250 | 508x267 | 5x3 | 375 | 22.00 |
| 20"x12" | 500x300 | 508x324 | 5x4 | 375 | 23.10 |
| 20"x14" | 500x350 | 508x368 | 5x4 | 375 | 24.30 |
| 20"x16" | 500x400 | 508x419 | 5x4 | 375 | 25.20 |
| 20"x18" | 500x450 | 508x457 | 5x4.5 | 375 | 26.10 |
| 24"x14" | 600x350 | 610x368 | 5x4 | 400 | 26.10 |
| 24"x16" | 600x400 | 610x419 | 5x4 | 400 | 30.70 |
| 24"x18" | 600x450 | 610×457 | 5x4.5 | 400 | 31.80 |
| 24"x20" | 600x500 | 610x508 | 5x5 | 400 | 33.50 |
Copper-Nickel Butt-Weld Reducers EEMUA 234 Stock
| Specification | OD1xOD2 | S1xS216bar | S1xS220bar | L | Weight 16bar | Weight 20bar |
| inch | mm | mm | mm | mm | kg | kg |
| 1*3/4 | 30*25 | 2.5*2 | 2.5*2 | 51 | 0.09 | 0.09 |
| 11/4*1 | 38*30 | 2.5*2.5 | 2.5*2.5 | 51 | 0.11 | 0.11 |
| 11/4*3/4 | 38*25 | 2.5*2 | 2.5*2 | 51 | 0.10 | 0.10 |
| 11/2*11/4 | 44.5*38 | 2.5*2.5 | 2.5*2.5 | 64 | 0.17 | 0.17 |
| 11/2*1 | 44.5*30 | 2.5*2.5 | 2.5*2.5 | 64 | 0.15 | 0.15 |
| 11/2*3/4 | 44.5*25 | 2.5*2 | 2.5*2 | 64 | 0.14 | 0.14 |
| 2*11/2 | 57*44.5 | 2.5*2.5 | 2.5*2.5 | 76 | 0.25 | 0.25 |
| 2*11/4 | 57*38 | 2.5*2.5 | 2.5*2.5 | 76 | 0.23 | 0.23 |
| 2*1 | 57*30 | 2.5*2.5 | 2.5*2.5 | 76 | 0.21 | 0.21 |
| 21/2*2 | 76.1*57 | 2.5*2.5 | 2.5*2.5 | 89 | 0.40 | 0.40 |
| 21/2*11/2 | 76.1*44.5 | 2.5*2.5 | 2.5*2.5 | 89 | 0.36 | 0.36 |
| 21/2*11/4 | 76.1*38 | 2.5*2.5 | 2.5*2.5 | 89 | 0.34 | 0.34 |
| 3*21/2 | 88.9*76.1 | 2.5*2.5 | 2.5*2.5 | 89 | 0.50 | 0.50 |
| 3*2 | 88.9*57 | 2.5*2.5 | 2.5*2.5 | 89 | 0.44 | 0.44 |
| 3*11/2 | 88.9*44.5 | 2.5*2.5 | 2.5*2.5 | 89 | 0.40 | 0.40 |
| 4*3 | 108*88.9 | 3*2.5 | 3*2.5 | 102 | 0.82 | 0.82 |
| 4*21/2 | 108*76.1 | 3*2.5 | 3*2.5 | 102 | 0.76 | 0.76 |
| 4*2 | 108*57 | 3*2.5 | 3*2.5 | 102 | 0.68 | 0.68 |
| 6*4 | 159*108 | 3*3 | 3.5*3 | 140 | 1.54 | 1.78 |
| 6*3 | 159*88.9 | 3*2.5 | 3.5*2.5 | 140 | 1.42 | 1.65 |
| 6*21/2 | 159*76.1 | 3*2.5 | 3.5*2.5 | 140 | 1.35 | 1.56 |
| 6*2 | 159*57 | 3*2.5 | 3.5*2.5 | 140 | 1.30 | 1.50 |
| 8*6 | 219.1*159 | 4*3 | 4.5*3.5 | 152 | 3.16 | 3.54 |
| 8*4 | 219.1*108 | 4*3 | 4.5*3 | 152 | 2.72 | 3.05 |
| 8*3 | 219.1*88.9 | 4*2.5 | 4.5*2.5 | 152 | 2.55 | 2.87 |
| 8*21/2 | 219.1*76.1 | 4*2.5 | 4.5*2.5 | 152 | 2.45 | 2.74 |
| 10*8 | 267*219.1 | 4.5*4 | 5.5*4.5 | 178 | 5.36 | 6.53 |
| 10*6 | 267*159 | 4.5*3 | 5.5*3.5 | 178 | 4.69 | 5.70 |
| 10*4 | 267*108 | 4.5*3 | 5.5*3 | 178 | 4.11 | 5.00 |
| 12*10 | 323.9*267 | 5.5*4.5 | 7*5.5 | 203 | 9.09 | 11.52 |
| 12*8 | 323.9*219.1 | 5.5*4 | 7*4.5 | 203 | 8.33 | 10.55 |
| 12*6 | 323.9*159 | 5.5*3 | 7*3.5 | 203 | 7.39 | 9.35 |
| 14*12 | 368*323.9 | 6.5*5.5 | 8*7 | 330 | 20.44 | 25.06 |
| 14*10 | 368*267 | 6.5*4.5 | 8*5.5 | 330 | 18.73 | 22.95 |
| 14*8 | 368*219.1 | 6.5*4 | 8*4.5 | 330 | 17.28 | 21.16 |
| 16*14 | 419*368 | 7*6.5 | 9*8 | 356 | 27.04 | 34.60 |
| 16*12 | 419*323.9 | 7*5.5 | 9*7 | 356 | 25.51 | 32.62 |
| 16*10 | 419*267 | 7*4.5 | 9*5.5 | 356 | 23.51 | 30.05 |
| 18*16 | 457.2*419 | 8*7 | 9.5*9 | 381 | 36.80 | 43.70 |
| 18*14 | 457.2*368 | 8*6.5 | 9.5*8 | 381 | 34.61 | 41.10 |
| 18*12 | 457.2*323.9 | 8*5.5 | 9.5*7 | 381 | 32.72 | 38.85 |
| 20*18 | 508*457.2 | 8.5*8 | 11*9.5 | 508 | 57.48 | 74.38 |
| 20*16 | 508*419 | 8.5*7 | 11*9 | 508 | 55.17 | 71.39 |
| 20*14 | 508*368 | 8.5*6.5 | 11*8 | 508 | 52.07 | 67.38 |
| 24*20 | 610*508 | 10.5*8.5 | 13*11 | 508 | 82.15 | 101.70 |
| 24*18 | 610*457.2 | 10.5*8 | 13*9.5 | 508 | 78.34 | 96.99 |
| 24*16 | 610*419 | 10.5*7 | 13*9 | 508 | 75.49 | 93.46 |
| 28*24 | 711*610 | 12*10.5 | 15*13 | 610 | 133.30 | 166.62 |
| 28*20 | 711*508 | 12*8.5 | 15*11 | 610 | 122.82 | 153.52 |
| 28*18 | 711*457.2 | 12*8 | 15*9.5 | 610 | 117.58 | 146.97 |
| 32*28 | 813*711 | 13.5*12 | 17*15 | 610 | 173.09 | 217.96 |
| 32*24 | 813*610 | 13.5*10.5 | 17*13 | 610 | 161.42 | 203.26 |
| 36*32 | 914*813 | 15.5*13.5 | 19*17 | 610 | 301.43 | 369.49 |
| 36*28 | 914*711 | 15.5*12 | 19*15 | 610 | 287.89 | 352.89 |
| 36*24 | 914*610 | 15.5*10.5 | 19*13 | 610 | 274.48 | 336.45 |
Copper-Nickel Butt-Weld Reducers ASME B16.9 Stock
| Specification | OD1xOD2 | S110S | S210S | L | Weight |
| inch | mm | mm | mm | mm | kg |
| 1*3/4 | 33.4*26.7 | 2.77 | 2.11 | 51 | 0.10 |
| 1*1/2 | 33.4*21.3 | 2.77 | 2.11 | 51 | 0.09 |
| 11/4*1 | 42.2*33.4 | 2.77 | 2.77 | 51 | 0.12 |
| 11/4*3/4 | 42.2*26.7 | 2.77 | 2.11 | 51 | 0.11 |
| 11/4*1/2 | 42.2*21.3 | 2.77 | 2.11 | 51 | 0.105 |
| 11/2*11/4 | 48.3*42.2 | 2.77 | 2.77 | 64 | 0.19 |
| 11/2*1 | 48.3*33.4 | 2.77 | 2.77 | 64 | 0.17 |
| 11/2*3/4 | 48.3*26.7 | 2.77 | 2.11 | 64 | 0.16 |
| 11/2*1/2 | 48.3*21.3 | 2.77 | 2.11 | 64 | 0.15 |
| 2*11/2 | 60.3*48.3 | 2.77 | 2.77 | 76 | 0.28 |
| 2*11/4 | 60.3*42.2 | 2.77 | 2.77 | 76 | 0.26 |
| 2*1 | 60.3*33.4 | 2.77 | 2.77 | 76 | 0.23 |
| 2*3/4 | 60.3*26.7 | 2.77 | 2.11 | 76 | 0.22 |
| 21/2*2 | 73*60.3 | 3.05 | 2.77 | 89 | 0.49 |
| 21/2*11/2 | 73*48.3 | 3.05 | 2.77 | 89 | 0.44 |
| 21/2*11/4 | 73*42.2 | 3.05 | 2.77 | 89 | 0.42 |
| 21/2*1 | 73*33.4 | 3.05 | 2.77 | 89 | 0.40 |
| 3*21/2 | 88.9*73 | 3.05 | 3.05 | 89 | 0.61 |
| 3*2 | 88.9*60.3 | 3.05 | 2.77 | 89 | 0.54 |
| 3*11/2 | 88.9*48.3 | 3.05 | 2.77 | 89 | 0.49 |
| 3*11/4 | 88.9*42.2 | 3.05 | 2.77 | 89 | 0.48 |
| 4*3 | 114.3*88.9 | 3.05 | 3.05 | 102 | 0.84 |
| 4*21/2 | 114.3*73 | 3.05 | 3.05 | 102 | 0.78 |
| 4*2 | 114.3*60.3 | 3.05 | 2.77 | 102 | 0.70 |
| 4*11/2 | 114.3*48.3 | 3.05 | 2.77 | 102 | 0.68 |
| 6*4 | 168.3*114.3 | 3.4 | 3.05 | 140 | 1.74 |
| 6*3 | 168.3*88.9 | 3.4 | 3.05 | 140 | 1.60 |
| 6*21/2 | 168.3*73 | 3.4 | 3.05 | 140 | 1.53 |
| 8*6 | 219.1*168.3 | 3.76 | 3.4 | 152 | 3.00 |
| 8*4 | 219.1*114.3 | 3.76 | 3.05 | 152 | 2.60 |
| 10*8 | 273*219.1 | 4.19 | 3.76 | 178 | 5.76 |
| 10*6 | 273*168.3 | 4.19 | 3.4 | 178 | 5.02 |
| 10*4 | 273*114.3 | 4.19 | 3.05 | 178 | 4.40 |
| 12*10 | 323.8*273 | 4.57 | 4.19 | 203 | 7.56 |
| 12*8 | 323.8*219.1 | 4.57 | 3.76 | 203 | 6.92 |
| 12*6 | 323.8*168.3 | 4.57 | 3.4 | 203 | 6.14 |
| 14*12 | 355.6*323.8 | 4.78 | 4.57 | 330 | 15.03 |
| 14*10 | 355.6*273 | 4.78 | 4.19 | 330 | 13.77 |
| 14*8 | 355.6*219.1 | 4.78 | 3.76 | 330 | 12.70 |
| 14*6 | 355.6*168.3 | 4.78 | 3.4 | 330 | 12.06 |
| 16*14 | 406.4*355.6 | 4.78 | 4.78 | 356 | 18.47 |
| 16*12 | 406.4*323.8 | 4.78 | 4.57 | 356 | 17.43 |
| 16*10 | 406.4*273 | 4.78 | 4.19 | 356 | 16.06 |
| 16*8 | 406.4*219 | 4.78 | 3.76 | 356 | 15.26 |
| 18*16 | 457*406.4 | 4.78 | 4.78 | 381 | 21.99 |
| 18*14 | 457*355.6 | 4.78 | 4.78 | 381 | 20.68 |
| 18*12 | 457*323.8 | 4.78 | 4.57 | 381 | 19.55 |
| 18*10 | 457*273 | 4.78 | 4.19 | 381 | 18.58 |
| 20*18 | 508*457 | 5.54 | 4.78 | 508 | 37.48 |
| 20*16 | 508*406.4 | 5.54 | 4.78 | 508 | 35.97 |
| 20*14 | 508*355.6 | 5.54 | 4.78 | 508 | 33.95 |
| 20*12 | 508*323.8 | 5.54 | 4.57 | 508 | 31.92 |
| 24*20 | 610*508 | 6.35 | 5.54 | 508 | 49.70 |
| 24*18 | 610*457 | 6.35 | 4.78 | 508 | 47.40 |
| 24*16 | 610*406.4 | 6.35 | 4.78 | 508 | 45.67 |
Copper Nickel Reducer FAQ
What is a Copper Nickel Reducer used for?
A copper nickel reducer is used to connect copper nickel pipes of different diameters while maintaining efficient fluid flow. It is widely installed in seawater cooling systems, ballast water pipelines, offshore platforms, shipbuilding projects, desalination plants, and other marine piping applications where corrosion resistance is critical.
What is the difference between a concentric reducer and an eccentric reducer?
A concentric reducer has both pipe ends aligned on the same centerline, making it suitable for vertical piping systems and applications requiring symmetrical flow. An eccentric reducer features an offset centerline and is commonly used in horizontal pipelines and pump suction lines to prevent air accumulation and flow disruption.
Which material grade is better: CuNi 90/10 or CuNi 70/30?
CuNi 90/10 (C70600) is the most widely used and cost-effective choice for general marine seawater systems. CuNi 70/30 (C71500) contains a higher nickel content, providing greater mechanical strength and enhanced resistance to high-velocity seawater, erosion-corrosion, and demanding offshore environments.
Can you supply ASME B16.9 Copper Nickel Reducers?
Yes. We manufacture and supply ASME B16.9 copper nickel reducers in both concentric and eccentric designs. Available sizes typically range from 1/2″ to 24″ with wall thicknesses including Sch 5S, Sch 10S, Sch 40S, and Sch 80S, depending on project requirements.
Are DIN and EEMUA Copper Nickel Reducers available?
Yes. We supply copper nickel reducers manufactured in accordance with DIN 86089, EEMUA 146, and EEMUA 234 standards. Standard sizes are available from DN15 to DN500 with pressure ratings such as 10 bar, 14 bar, 16 bar, and 20 bar for marine and offshore piping systems.
Can Copper Nickel Reducers be customized?
Yes. Custom dimensions, wall thicknesses, material grades, pressure ratings, and inspection requirements can be supplied according to project specifications. Reducers can also be manufactured to customer drawings and international standards.
What inspection documents can be provided?
Depending on project requirements, reducers can be supplied with EN 10204 3.1 Material Test Certificates (MTC), dimensional inspection reports, PMI reports, hydrostatic test reports, and third-party inspection documentation from agencies such as SGS, BV, DNV, ABS, or LR.
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