Forged Copper Nickel 70/30 Concentric Reducer ASME B16.9 Class 150 Pipe Fitting with Butt Weld Connection

Forged Copper Nickel 70/30 Concentric Reducer ASME B16.9 Class 150 Pipe Fitting

1.Product Description

The Copper Nickel Reducer Fitting is an essential diameter-transition component used in piping systems to connect pipes of differing sizes. Manufactured from copper-nickel alloy, the product is offered in two principal grades: 90/10 Copper Nickel (UNS C70600, equivalent to BFe10-1-1) and 70/30 Copper Nickel (UNS C71500, equivalent to B30). Produced through forging or extrusion processes, the fitting incorporates a smoothly tapered internal bore that minimizes local flow resistance during diameter changes. To accommodate various installation conditions, the product is available in Concentric and Eccentric configurations – the concentric type is suitable for pump discharges, vertical risers, and applications where centerline alignment is essential; the eccentric type is specifically designed for horizontal pipelines, providing a flush bottom surface to facilitate liquid drainage. The fittings are manufactured in compliance with ASME B16.9, DIN 86089, and GB/T 12459, with end connections offered in butt-weld, socket-weld, threaded, and flanged options.

2.Product Applications

Owing to its excellent resistance to seawater and chemical corrosion, this product finds extensive application across numerous civil and industrial sectors:

• Commercial shipbuilding and offshore energy development – employed in fire-water systems, ballast water treatment units, main and auxiliary engine cooling water lines, and daily fresh water systems on bulk carriers, container ships, LNG carriers, and offshore production platforms.

• Seawater integrated utilization industry – used in thermal and membrane desalination plants for intake headers, coagulation/sedimentation/filtration units, and brine discharge pipeline diameter transitions.

• Thermal and nuclear power generation – adapted for circulating water pump suction/discharge connections, condenser cooling water inlet/outlet pipes, and plant-wide closed cooling water systems at coastal coal-fired and pressurized-water-reactor nuclear stations.

• Petroleum refining and organic chemical processing – applied in circulating water heat-exchanger piping for atmospheric/vacuum distillation, catalytic cracking, and hydrotreating units, as well as transfer lines for corrosive acid/alkali/salt media.

• Municipal public utilities – serving as standard reducing components between city water mains and branch lines, between treatment units in large wastewater plants, and within district heating/cooling networks.

• Commercial buildings and industrial facilities – widely used for pipe diameter transitions in HVAC chiller systems, industrial cooling water stations, air compressor rooms, and fire pump rooms.

3.Product Advantages

• Superior corrosion resistance – copper-nickel alloys exhibit exceptionally high resistance to pitting and crevice corrosion in chloride-containing environments; the surface oxide film, if damaged, rapidly self-repairs in flowing media, ensuring long-term service safety.

• Excellent erosion resistance – the material demonstrates strong resistance to abrasive wear from suspended particles in flowing seawater, maintaining a smooth and intact internal surface even under high-velocity conditions.

• Significant anti-biofouling effectiveness – sustained slow release of copper ions effectively inhibits the attachment of various marine organisms (algae, mollusks, etc.), maintaining the system's flow capacity at design levels over extended periods.

• Stable high-temperature mechanical properties – retains adequate strength and creep resistance at elevated operating temperatures, making it suitable for heat-exchanger inlet/outlet sections subject to frequent thermal fluctuations.

• Convenient weldability – shows excellent compatibility with TIG, CO₂ gas-shielded, and manual arc welding processes, producing sound weld beads with low defect rates and joint properties well matched to the parent metal.

• Favorable lifecycle economics – although initial procurement cost exceeds that of ordinary carbon steel, longer service life, reduced maintenance needs, and lower replacement frequency result in superior total expenditure over the equipment's full lifecycle.

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​4.Key Product Specifications

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