70/30 CuNi Copper Nickel Elbow ASME B16.9 BW Fittings Schedule 40 Hot Sale

70/30 CuNi Copper Nickel Elbow ASME B16.9 BW Fittings Schedule 40 Hot Sale

1.Product Description

The Copper Nickel Elbow is a pipe fitting manufactured from copper-nickel alloy, serving as a core component for redirecting media flow in piping systems. The product is primarily available in UNS C70600 (90/10 copper-nickel) and UNS C71500 (70/30 copper-nickel). The former contains approximately 10% nickel and offers better cost-effectiveness; the latter contains about 30% nickel and provides superior high-temperature resistance and erosion resistance.

The elbow features an arc-shaped pipe section, with standard bend angles of 45°, 90°, and 180°. Bend radius is classified as Long Radius (R=1.5 × nominal diameter) and Short Radius (R=1.0 × nominal diameter). Long Radius elbows offer lower flow resistance, while Short Radius elbows suit installations with confined space. The product covers sizes from DN15 to DN600, with wall thickness schedules ranging from Sch5S to XXS available across the full range.

Manufacturing processes include seamless push-forming for small diameters, hot extrusion for medium diameters, and medium-frequency induction bending or welded forming for large diameters. End connections are available in Butt-Weld (BW), Socket-Weld (SW), and Threaded (NPT/BSP) types to meet various piping system requirements. Product quality strictly complies with ASME B16.9, DIN 86090, and EEMUA 146 international standards, with each piece supplied with complete material certificates and inspection reports.

2.Product Applications

Copper Nickel Elbows are widely used in piping systems handling seawater, brackish water, saline wastewater, and various chemical media. Key application areas include:

• Marine and Offshore: Overboard seawater cooling systems, ballast water lines, firewater piping, and deck wash systems on commercial vessels, naval ships, and offshore platforms.

• Oil and Gas: Process piping on offshore production platforms, FPSO topside modules, and brine treatment systems in refineries and chemical plants.

• Power Facilities: Condenser circulating water systems in thermal power plants, equipment cooling water circuits in nuclear facilities, and closed cooling loops in combined-cycle gas/steam turbine power plants.

• Desalination: Brine recirculation lines in MSF and MED desalination units, as well as RO pre-treatment pipelines.

• Civil and General Industry: Large-scale central air-conditioning chilled water systems, pharmaceutical clean piping systems, food and beverage sanitary-grade lines, and district cooling/heating networks.

3.Product Advantages

1. Excellent Corrosion Resistance, Long Service Life
Copper-nickel alloys rely on a dense cuprous oxide (Cu₂O) surface film for corrosion protection in seawater environments. This film is self-healing—even if mechanically damaged, it rapidly regenerates. In flowing seawater, C70600 exhibits a corrosion rate of approximately 0.025mm/year, while C71500 achieves as low as 0.018mm/year. Service life typically exceeds 20 years, which is 5 to 8 times longer than carbon steel elbows.

2. Natural Anti-Biofouling
Copper ions are slowly released from the pipe surface, creating a micro-toxic environment that inhibits marine organism attachment, effectively preventing barnacles, mussels, and algae from colonizing. Copper-nickel elbows require no antifouling coatings—an environmentally friendly solution that significantly reduces cleaning frequency and maintenance man-hours.

3. High Strength and Impact Resistance
C70600: Tensile≥290MPa, Yield≥110MPa; C71500: Tensile≥370MPa, Yield≥130MPa. Both grades have elongation ≥30%, demonstrating excellent toughness that effectively resists water hammer impacts and mechanical vibration, preventing brittle fracture.

4. Welding-Friendly and Construction Convenient
High compatibility with same-grade copper-nickel pipes, suitable for TIG, MIG, or SMAW welding. Preheating and post-weld heat treatment are generally unnecessary, simplifying on-site operations and effectively shortening installation schedules.

5. Full Lifecycle Economy
Although initial procurement costs are higher than carbon steel products, the elimination of coating requirements, reduced replacement frequency, and low maintenance needs result in total lifecycle costs over 20 years being approximately 60%–70% of coated carbon steel solutions—delivering significant long-term economic benefits.

​4.Key Product Specifications

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.