Copper nickel pipe fittings, also known as CuNi pipe fittings or cupronickel fittings, are essential components for connecting, changing direction, branching, reducing size and terminating copper nickel piping systems. They are commonly used together with copper nickel pipes in marine and offshore applications.

Due to the special alloy composition of copper, nickel, iron and manganese, copper nickel fittings offer excellent corrosion resistance in seawater environments. They are especially suitable for shipbuilding piping systems, offshore engineering, desalination plants, condensers, cooling systems and other seawater service applications.

We supply a complete range of copper nickel pipe fittings, including elbows, tees, reducers, flanges, caps, stub ends, couplings and custom fabricated fittings. Available materials include 90/10 copper nickel C70600 / CuNi10Fe1Mn and 70/30 copper nickel C71500 / CuNi30Mn1Fe. Products can be supplied according to ASTM, ASME, DIN, EN, EEMUA and customer drawings.

Available Copper Nickel Pipe Fittings

We supply a wide range of copper nickel pipe fittings for complete marine piping solutions.

Common Material Grades

Functions of Copper Nickel Pipe Fittings

Copper nickel pipe fittings are used for different functions in a piping system. Selecting the correct fitting type is important for safe installation and long-term operation.

Standards

Our copper nickel pipe fittings can be supplied according to international standards, marine project specifications or customer drawings.

Common standards include:

ASTM B151

ASTM B466

ASTM B467

ASME B16.9

ASME B16.5

ASME B16.11

DIN 86087

DIN 86088

DIN 86089

DIN 86090

EEMUA 145

EN 12420

EN 12449

Customer drawings and project specifications

General Supply Range

Production Process by Fitting Type

Copper Nickel Elbows:

Copper nickel elbows are usually produced by hot forming, cold forming or welded fabrication. After forming, the elbows are heat treated, calibrated, cleaned and inspected.

Flow Chart:
Raw Material Inspection → Cutting → Forming → Heat Treatment → Calibration → End Beveling → Surface Cleaning → Inspection → Marking → Packaging

Copper Nickel Tees:

Copper nickel tees can be produced by hydraulic forming, hot forming, welding or fabrication according to the size and project requirement.

Flow Chart:
Raw Material Inspection → Cutting → Forming / Welding → Heat Treatment → Sizing → End Processing → Cleaning → Inspection → Packaging

Copper Nickel Reducers:

Copper nickel reducers are produced by forming or fabrication. Concentric reducers and eccentric reducers are available for different piping layouts.

Flow Chart:
Raw Material Inspection → Cutting → Forming → Heat Treatment → Sizing → End Processing → Inspection → Packaging

Copper Nickel Flanges:

Copper nickel flanges are generally produced from forged blanks, plates or bars through machining. Bolt holes, sealing faces and connection ends are machined according to the required standard.

Flow Chart:
Material Inspection → Forging / Cutting → Heat Treatment → CNC Machining → Drilling → Surface Finishing → Inspection → Marking → Packaging

Quality Control and Inspection

To ensure reliable service in marine and offshore environments, copper nickel pipe fittings can be inspected and tested according to customer requirements and applicable standards.

Available inspections include:

Chemical composition analysis

Mechanical property test

Visual inspection

Dimensional inspection

Wall thickness inspection

Angle and radius inspection for elbows

Weld inspection for welded fittings

PMI material verification

Hydrostatic test

Dye penetrant test

Ultrasonic test

Radiographic test, if required

Material test certificate

Third-party inspection report

Classification society inspection, if required

Packaging and Delivery

Copper nickel pipe fittings are packed carefully to prevent damage, deformation, scratching and contamination during transportation. Standard packaging includes wooden cases, wooden pallets, cartons, plastic wrapping and export seaworthy packing.

For machined flanges, sealing faces and finished surfaces can be protected with plastic caps, foam, paper, oil protection or individual wrapping according to customer requirements.

Request a Quote for Copper Nickel Pipe Fittings

Please send us your required fitting type, material grade, size, wall thickness, standard, quantity and drawing if available. Our team will provide a fast quotation and technical support for your marine copper nickel pipe fitting project.