Copper Nickel 90/10 Flange/Tee/Elbow Joint Fittings

• Customization: Available
• Standard: DIN, ANSI, GB, JIS, BSW, ISO
• Material: Stainless Steel
• Model NO.: Copper Nickel 90/10 Flange/Tee/Elbow Joint Fitting
• Surface Treatment: Anodizing,Plating,Polishing,etc
• Materials: 90/10 CuNi
• Size: Nps 1/2" to Nps 24"
• Shape: Round/Customized
• Process: Polished/Solution Treatment
• Material Testing: Tensile and Impact Tests
• Tolerance: +/-0.005~+/-0.01mm
• Stock: Available
• Facing: FF, RF, Rj, FM, M, T, G, etc.
• OEM ODM: Accept
• Used: Factory, Wood House
• Packing: Standard Export Packing
• MOQ: 1 Ton
• Color: Sliver
• Delivery Time: 10-30 Working Days
• Transport Package: Cartons, Pallet, Cases
• Specification: SCH 5S-SCH160
• Trademark: EZS
• Origin: China
• Production Capacity: 10000 PCS/Year

Product Description

Product Description

1. Standard and Material

• Standard Compliance: Flanges conform to EN 1092-3 (Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 3: Copper alloy flanges), which specifies dimensions, materials, and testing for marine-grade copper-nickel flanges.
• Material: 90/10 copper-nickel (90Cu-10Ni), typically matching UNS C70600 or equivalent alloys (e.g., EN 1.0290, CuNi10Fe1Mn).

2. Chemical Composition (EN 1092-3 Requirements)

Element	Content (%)
Copper (Cu)	88.0-91.0
Nickel (Ni)	9.0-11.0
Iron (Fe)	0.4-1.0
Manganese (Mn)	0.5-1.0
Zinc (Zn)	≤0.25
Other	Balanced

3. Dimensions and Pressure Ratings

• PN Designation: Flanges are rated for PN10, PN16, PN25, and PN40 (pressure classes equivalent to 10 bar, 16 bar, 25 bar, 40 bar).
• Nominal Pipe Size (NPS): Range from NPS 1/2" to NPS 24" (DN15 to DN600).
• Key Dimensions:
  • Flange face diameter, bolt circle diameter, thickness, and bolt hole patterns per EN 1092-1 (table references in EN 1092-3).
  • Slip-on design features a raised face (RF) or flat face (FF) for gasket compatibility.

4. Mechanical Properties

Property	Minimum Values
Tensile Strength (MPa)	310
Yield Strength (MPa)	138
Elongation (%)	25
Hardness (HV)	≤130

5. Design and Construction Features

• Slip-on Design:
  • The flange slides over the pipe and is welded on the inner and outer edges for strength.
  • Ideal for easy alignment during installation, reducing stress on pipe joints.
• Gasket Surface: Raised face (RF) is standard for marine applications, providing a reliable seal against seawater and corrosive media.
• Bolt Holes: Symmetrically arranged for uniform clamping force; holes match EN 1092-1 bolt specifications (e.g., M10 to M48 bolts).

6. Corrosion Resistance and Marine Applications

• Key Advantages:
  • Excellent resistance to seawater, biofouling, and erosion corrosion, making them suitable for offshore and marine environments.
  • Resistant to stress corrosion cracking (SCC) in chloride-rich conditions (e.g., saltwater).
    • Seawater cooling systems on ships, rigs, and coastal facilities.
    • Pipe connections in marine engines, desalination plants, and offshore platforms.
    • Heat exchanger flanges exposed to corrosive fluids.

7. Testing and Quality Control

• Material Testing:
  • Chemical analysis to verify alloy composition (EN 10204 3.1 certificate).
  • Tensile and impact tests to ensure mechanical properties.
• Fabrication Checks:
  • Visual inspection for surface defects (cracks, porosity).
  • Dimensional verification against EN 1092-3 standards.
• Welding Requirements:
  • Welding procedures must comply with EN 288 or ISO 15614 for copper-nickel alloys.
  • Post-weld inspection (e.g., dye penetrant testing) to ensure joint integrity.
• Hydrostatic Test: Flanges may be tested to 1.5x the rated pressure to confirm leak-tightness (per project specifications).

8. Installation and Maintenance

• Installation Tips:
  • Use compatible gaskets (e.g., spiral wound, PTFE-coated) rated for marine environments.
  • Tighten bolts uniformly to avoid gasket damage or misalignment.
  • Welds should be performed by certified operators to prevent corrosion paths.
• Maintenance:
  • Periodic inspection for signs of corrosion (e.g., pitting, crevice corrosion at gasket interfaces).
  • Cleanse flanges of marine growth (barnacles, algae) to maintain corrosion resistance.

9. Comparison with Other Flange Materials

Material	Corrosion Resistance	Cost	Weight	Application Suitability for Marine Use
90/10 CuNi	Excellent	Medium	Light	Ideal for seawater and heat exchange
Stainless Steel	Good	High	Heavy	Suitable for mild marine conditions
Carbon Steel	Poor	Low	Medium	Not recomm

 

 

 

 

 

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