C70600 C71500 Copper Nickel Reducer Fitting ASME B16.9 for Desalination System

C70600 C71500 Copper Nickel Reducer Fittings ASME B16.9 for Desalination System

1.Product Description

The Copper Nickel Reducer Fitting is a critical pipe component designed to achieve smooth diameter transitions within piping systems. It is manufactured from high-grade copper-nickel alloys, primarily available in 90/10 (UNS C70600, BFe10-1-1) and 70/30 (UNS C71500, B30) compositions. Produced through hot extrusion or forging processes, the fitting features a precision-machined internal conical bore that ensures uniform fluid flow. Depending on the geometric configuration, it is classified into Concentric Reducers (for vertical risers or applications requiring strict centerline alignment) and Eccentric Reducers (for horizontal pipelines where bottom-level drainage or top-level venting is essential). The products are fully compliant with ASME B16.9, DIN 86089, and GB/T 12459, and can be supplied with butt-weld ends, socket-weld ends, threaded ends, or flanged ends to accommodate various field installation methods.

2.Product Applications

Owing to its superior corrosion resistance, this product is widely employed in the following civil and industrial sectors:

• Commercial shipbuilding and offshore oil/gas extraction – used in seawater fire-fighting systems, ballast water treatment pipelines, cooling water circulation loops, and fresh water supply lines aboard large cargo vessels, oil tankers, RO-RO passenger ships, and offshore drilling platforms.

• Seawater resource utilization – applied in large-scale desalination projects for raw water intake, pre-treatment filtration, and high-concentration brine discharge piping requiring diameter reduction.

• Energy and power facilities – utilized in steam turbine condenser cooling systems, auxiliary equipment cooling water pipes, and plant-wide industrial water networks at coastal thermal and nuclear power stations.

• Petroleum refining and basic chemical processing – employed in circulating water heat-exchanger piping for atmospheric/vacuum distillation units and catalytic cracking sections, as well as transfer lines for strongly corrosive media such as caustic soda and soda ash.

• Municipal water supply/drainage and district energy systems – serve as transition joints between main trunks and branch lines in city waterworks, sewage treatment plants, and large-scale district cooling/heating networks.

• General industry and commercial buildings – suitable for diameter-change connections in medium-to-large chiller plants, air compressor stations, process cooling water systems, and fire pump rooms.

3.Product Advantages

• Excellent erosion and abrasion resistance – the material quickly forms a tenacious cuprous oxide protective layer on its surface, effectively resisting scouring and erosion by high-velocity sand-bearing seawater and chloride-containing media, even under high-flow conditions.

• High galvanic corrosion resistance – copper-nickel alloys possess a stable electrochemical potential, minimizing the risk of severe galvanic corrosion when in contact with other common metallic materials in the piping system, thereby safeguarding overall pipeline integrity.

• Outstanding anti-biofouling performance – the slow release of copper ions from the alloy deters aquatic organisms such as barnacles and mussels, substantially extending cleaning intervals and reducing manual maintenance costs.

• Reliable high-temperature strength – maintains sufficient creep resistance and yield strength under elevated-temperature conditions, making it suitable for frequently temperature-cycled locations such as heat-exchanger inlet/outlet connections.

• Strong weldability – exhibits excellent compatibility with conventional welding processes (TIG, MIG, and manual arc welding), requiring no complex preheating before welding or post-weld heat treatment; weld joint efficiency can reach 0.9 or higher.

• Low lifecycle cost – under identical operating conditions, its effective service life typically reaches approximately four times that of carbon steel products, with extremely low failure rates, resulting in significantly lower total procurement, maintenance, and replacement costs over the entire lifecycle.

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​4.Key Product Specifications

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