ASME B16.5 CuNi 70/30 Forged Socket Weld Flange Class 150 Marine Grade Corrosion Resistant
ASME B16.5 CuNi 70/30 Forged Socket Weld Flange Class 150 Marine Grade Corrosion Resistant
1.Product Description
Copper Nickel Flange (also known as Cu-Ni Flange or Cupronickel Flange) is a pipe connection component manufactured from copper-nickel alloy. It is a mechanical device with a rim-like structure used to connect, guide, or strengthen two components in a piping system. The flange features bolt holes around its circumference and is joined to pipes/fittings by bolting with specialized gaskets to ensure secure pressure-tight seals.
Copper Nickel Flanges are available in two primary alloy grades:
90/10 Copper Nickel (UNS C70600 / BFe10-1-1): Composed of approximately 90% copper and 10% nickel, with small additions of iron and manganese. This grade offers an effective balance of strength, corrosion resistance, and cost effectiveness.
70/30 Copper Nickel (UNS C71500 / BFe30-1-1): Composed of approximately 70% copper and 30% nickel, offering enhanced corrosion resistance and higher strength.
The flanges are manufactured through processes including forging, heat treatment, CNC machining, and non-destructive testing (UT/MT), with acid pickling and passivation surface treatment.
2.Product Applications
Copper Nickel Flanges are widely used in various industries and applications due to their exceptional corrosion resistance:
-
Marine and Shipbuilding: Seawater cooling systems, ballast water systems, fire-fighting systems, main and auxiliary engine cooling pipelines, and seawater piping systems for commercial and naval vessels.
-
Offshore Oil and Gas Platforms: Seawater delivery, fire-fighting, and ballast pipelines.
-
Desalination Plants: Reverse osmosis/evaporation unit seawater inlet and brine discharge pipelines.
-
Coastal Power Stations: Seawater cooling circulation system intake and discharge pipelines.
-
Heat Exchangers and Condensers: Cooling water systems in power plants and industrial facilities.
-
Chemical and Petrochemical Industries: Piping systems handling corrosive media.
-
Aquaculture: Seawater supply systems for fish farming.
-
General Industrial: Connecting pipes, pumps, valves, and other equipment to form a complete piping system.
3 · Product Advantages
-
Superior Corrosion Resistance: Excellent resistance to seawater corrosion, chloride ion attack, salt spray, pitting, and crevice corrosion. 90/10 alloy corrosion rate is less than 0.025mm/year, while 70/30 alloy achieves even lower rates of ≤0.01mm/year, far superior to 316L stainless steel.
-
Anti-Biofouling: Copper ions naturally inhibit the attachment of marine organisms such as barnacles and algae, reducing pipeline clogging and maintenance requirements.
-
High Strength and Erosion Resistance: 70/30 alloy offers tensile strength ≥490MPa and yield strength ≥180MPa, with excellent resistance to high-velocity seawater erosion and cavitation corrosion.
-
Excellent Weldability and Fabrication: Good welding and processing properties, compatible with same-material CuNi pipes for perfect welded joints.
-
Low Magnetic Permeability: Ideal for applications requiring non-magnetic properties.
-
Long Service Life: Thermal stability up to approximately 300°C, with service life up to three times that of stainless steel.
-
Low Maintenance: The anti-corrosion and anti-biofouling properties significantly reduce long-term maintenance costs.
-
Comprehensive Standards Compliance: Manufactured to multiple international standards including ASME B16.5, GB/T 9119, DIN, EN-1092, and marine standards EEMUA 145.
4.Key Product Specifications
| Parameter | Specification |
| Material Grades | 90/10 Cu-Ni (UNS C70600 / BFe10-1-1), 70/30 Cu-Ni (UNS C71500 / BFe30-1-1) |
| Chemical Composition (90/10) | Cu 86-90%, Ni 9-11%, Fe 0.8-1.8%, Mn ≤1.0% |
| Chemical Composition (70/30) | Cu 65-70%, Ni 29-33%, Fe 0.4-1.0%, Mn ≤1.0% |
| Size Range | 1/2" to 60" NB / DN15 to DN1500 |
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500 (ASME); PN6, PN10, PN16, PN25, PN40, PN64, PN100 (DIN) |
| Temperature Range | -196°C to 400°C |
| Standards | ASME B16.5, ASME B16.47, GB/T 9119, DIN, EN-1092, EEMUA 145, MIL-F-20042 |
| Flange Types | Weld Neck (WN), Slip-On (SO), Blind (BL), Threaded (Th), Socket Weld (SW), Lap Joint (LJ) |
| Sealing Faces | RF (Raised Face), FF (Flat Face), FM (Female), RTJ (Ring Type Joint), T&G (Tongue & Groove) |
| Tensile Strength (90/10) | 275 – 360 MPa (Annealed) |
| Tensile Strength (70/30) | 345 – 420 MPa (Annealed) |
| Yield Strength (90/10) | 90 – 160 MPa (Annealed) |
| Yield Strength (70/30) | 120 – 200 MPa (Annealed) |
| Density | ~8.94 g/cm³ |
| Maximum Service Temperature | ~300°C (continuous service) |
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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.