Marine Grade CuNi 70/30 SWRF Flange Class150, Corrosion Resistant Forged C71500
| Product Name | Marine Grade CuNi 70/30 SWRF Flange Class150, Corrosion Resistant Forged C71500 | Surfacefinish | Smooth, Polished |
|---|---|---|---|
| Easy Installation | Yes | Sealing Surface Form | RF MFM TG RJ |
| Nickelcontent | 30% Nickel | Customized Support | OEM |
| Use | Machanical Parts | Level | AAA |
| Sizerange | 1/2 Inch To 48 Inches | Technics | Casting |
| Standards | ASTM B151, ASME B16.5 | Temperaturerange | -50°C To 200°C |
| Mode Of Connection | Welding | Flange Type | Weld Neck |
| Compressive Strength | Strong | Country Of Origin | China |
| Connection | Welding, Threaded, Etc. | Standardscompliance | ASTM B466, ASTM B466M, ASME B16.5 |
| Special Functions | Good Elasticity, Low Steel Value | Surface | Paint Spraying |
| Density | 8.9 G/cm³ | Connectiontype | Welded |
| Austenitic Stainless | C71500 | Corrosionresistance | High Resistance To Seawater Corrosion |
| Temperature Rating | -196°C To 300°C | Warranty | 1 Year |
| Standard | ASTM B466 | Leakage Rate | Zero Leakage |
| Surface Treatment | Polishing, Sand Blasting, Etc. | Pressure | 16K |
| Process | Casting, Forging, Etc. | Weldability | Good |
| Link Mode | Forging | Standard Of Execution | HG/T20592-2009 |
| Durability | High | Design | Weld Neck, Slip On, Etc. |
| Product Type | Flange With Neck Butt Welding | Application | Marine, Offshore, Chemical Processing |
| Hardness | HB 90-110 | Type | Slip-On, Weld Neck, Blind, Threaded |
| Machinability | Fair | Size | 3/4 |
| Tensilestrength | Approximately 450 MPa | Often Used Of | PN≤10.0MPa,DN≤40 |
| Face Type | Raised Face, Flat Face, Ring Type Joint | Corrosion Resistance | Excellent |
| Thickness | Customized | Head Code | Round |
| Coppercontent | 70% Copper, 30% Nickel | ||
| Highlight | Marine Grade CuNi 70/30 flange,Corrosion resistant C71500 flange,Class150 forged copper nickel flange |
||
Marine Grade CuNi 70/30 SWRF Flange Class150, Corrosion Resistant Forged C71500
1.Product Description
The Copper Nickel Flange is a precision-engineered piping component manufactured from Copper-Nickel alloy, primarily grades 90/10 (UNS C70600) and 70/30 (UNS C71500). It is used to connect pipes, valves, pumps, and other equipment to form a leak-proof and durable piping system. Due to its outstanding resistance to seawater and biofouling, it is widely regarded as the standard material for marine, offshore, and desalination applications.
2. Applications
-
Marine & Shipbuilding: Seawater cooling systems, ballast lines, firewater systems, sanitary lines.
-
Offshore Oil & Gas: Topside piping on platforms, subsea equipment connections.
-
Desalination & Power: Evaporators, heat exchangers, condensers in MSF and MED desalination plants.
-
Industrial: Chemical processing where resistance to brackish water or diluted acids is required.
3. Product Functions
-
Mechanical Connection: Provides strong, detachable joints between pipes and equipment.
-
System Sealing: When combined with a suitable gasket, creates a pressure-tight seal against fluid leakage.
-
Easy Dismantling: Allows sections of the piping system to be removed for maintenance, repair, or modification.
-
Blind Function: Blind flanges close off pipe ends or vessel openings for pressure testing or future extension.
![]()
4.Technical Specifications
| Parameter | Value / Range |
| Material Grades | UNS C70600 (90/10 Cu-Ni), UNS C71500 (70/30 Cu-Ni) |
| Applicable Standards | ANSI B16.5, ASME B16.47, DIN, BS, JIS, EN1092-1 |
| Pressure Ratings | Class 150 / 300 / 600 / 900 / 1500 / 2500 |
| Size Range | DN15 (1/2") to DN1200 (48") |
| Flange Types | Weld Neck (WN), Slip-On (SO), Blind (BL), Lap Joint (LJ), Socket Weld (SW), Threaded (SCRD) |
| Tensile Strength (70/30) | ≥ 345 MPa (≥ 50 ksi) |
| Yield Strength (70/30) | ≥ 130 MPa (≥ 20 ksi) |
| Elongation (70/30) | ≥ 30% |
| Density | 8.94 g/cm³ (0.323 lb/in³) |
| Melting Point | 1150℃ – 1200℃ (2100℉ – 2190℉) |
| Facing Types | Raised Face (RF), Flat Face (FF), Tongue & Groove (T&G), Ring Type Joint (RTJ) |
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.

