Copper Nickel Weld Neck Flange

Our Copper Nickel Weld Neck Flange bore matches the ID of fittings or piping systems, for a smooth transition, eliminating possible turbulence at the joint.

Shihang Copper Nickel Weld Neck Flange is easy to install, simply butt weld to a pipe. It offers outstanding stress distribution at the tapered end of the Copper Nickel Weld Neck Flange.

Shihang employs strict quality control and testing on the long tapered hub, to match the pipe diameter. It is the best Copper Nickel Weld Neck Flange to count on in most demanding and critical applications.

With DN15-DN500, smooth finish, high-grade material, balanced alloy compounds, and proper machining, Shihang Copper Nickel Weld Neck Flange effectively transfers stress from flange to pipes.

Our Copper Nickel Weld Neck Flange, reduces downtime and poor piping system installation, by reducing the stress concentration from the base of the hub.

Shihang has a range of Copper Nickel Flanges of different grades and configurations. You can choose from our flat face to raised face Copper Nickel Weld Neck Flange configurations.

As a professional Copper Nickel Weld Flange manufacturer, we have the best forging facility in our 4 production lines. With 25 sets of CNC Machines, Shihang produces Copper Nickel Weld Neck Flanges with tight dimensional tolerances and are cost competitive.

Shihang Copper Nickel Weld Neck Flange comes with a quality certificate, and we work with a third party inspection team.

For custom Copper Nickel Weld Neck Flange, we have a range of materials in stock and high production capacity, guaranteeing a fast turnaround. Our team helps in CAD drawings and works closely with your team in every Copper Nickel Weld Neck Flange manufacturing stage.

Our technical support is available 24/7 to answer all your questions on Copper Nickel Weld Neck Flange needs. Contact us today for standard or custom weld neck flange needs.

 

Copper Nickel Weld Neck Flanges: The Ultimate FAQ Guide

 

 

What is Copper Nickel Weld Neck Flange?

CuNi weld neck flanges are known for the tapered hub with varying lengths. It has round protruding rim on a circular fitting.

Figure 1 CuNi weld neck flange

The copper nickel weld flanges are also called tapered hub flange or high hub flange. With the Cupronickel weld neck flange, specifying the pipe thickness you intend to use.

Where can you use Copper Nickel Weld Neck Flanges?

Cupronickel weld neck flanges are the perfect choice for application in:

• Extreme and fluctuating temperature conditions
• High pressure and stress situations
• Hazardous environments

It makes Cupronickel weld neck flanges suitable for shipbuilding, desalination, offshore platforms, power generation, cooling systems, food processing plants, etc.

What are the Characteristics of Weld Neck Flange?

1. Resistance to biofouling, erosion, stress and corrosion
2. Can withstand high pressure
3. Suitable for applications with fluctuating temperature
4. Guarantees a sturdy connection
5. Can withstand the turbulent flow
6. Initial installation cost is high however CuNi weld neck flange is long-lasting

How does Copper Nickel Weld Neck Flange Work?

Cupronickel weld neck flange is butt welded to copper nickel pipes for a seamless connection.

It ensures seamless flow throughout the pipe, while minimizing possible turbulence, in high pressure and high-temperature applications.

CuNi weld neck flange helps to transfer stress that could otherwise concentrate on the flange hub to the entire piping system. With this, the CuNi weld neck flange will withstand vibration and other devastating environmental conditions.

Of course, the inside diameter of Cupronickel weld neck flange should match the inside diameter of copper nickel pipe or CuNi fitting.

What is the difference between Copper Nickel Pipe Slip on Flange and Weld Neck Flange?

Figure 2 Slip on flange vs weld neck flange

Flange structure: CuNi weld neck flange has a long hub which is tapered. While CuNi slip on flange is virtually flat or with a small protrusion for raised face (RF) flange.

Working environment: Cupronickel weld neck flange is suitable for high pressure, and fluctuating temperature conditions. Cupronickel slip on flange is recommended for low-pressure application with nearly stable temperature conditions.

Joining flange to CuNi pipe: You should join Cupronickel slip on flange using fillet welding while for Cupronickel weld neck flange, butt welding is the recommended joining mechanism.

Cost: Initial installation cost of Cupronickel slip on flange is lower than Cupronickel weld neck flange.

Is Copper Nickel Weld Neck Flange same as Socket Weld Pipe Flange?

Figure 3

Copper nickel socket weld flange is a flat “ring” or “disc” with a bore having a shoulder like part (counterbore or recessed area) which determines the depth you can insert a Cupronickel pipe.

Cupronickel socket weld flange is nearly the same as CuNi slip on flange.

On the other hand, Copper nickel weld neck flange has a long tapered hub with a round rim. You will use the long tapered hub to join copper nickel pipe.

When it comes to joining CuNi socket weld flange, you should use fillet welding while the CuNi weld neck flange, butt welding is a perfect alternative.

What is ASME B16.5 compliant Copper Nickel Weld Neck Flanges?

These are Cupronickel weld neck flanges that conform to ASME B16.5 standard specifications.

What is the Average Weight of CuNi Weld Neck Flanges?

The weight of CuNi weld neck flange varies depending on the size, dimensions and pressure rating.

What are the Benefits of Attaching Copper Nickel Flanges by Welding?

1. Provides a robust and reliable connecting mechanism to pipes, fittings or other accessories
2. Can withstand high pressure and fluctuating temperature conditions
3. Guarantee sturdy connection
4. Distributes stress to the entire piping system instead of concentrating on the CuNi weld neck flange
5. It is easy to align piping systems with CuNi weld neck flange
6. Easy to install
7. Butt welding eliminates any possibility of leakage in the piping system

How do you Control Quality of Cupronickel Weld Neck Flanges?

1. Test quality of copper nickel grade to ensure a proper chemical balance
2. Adopt strict CuNi weld neck flange forging, forming, machining and heat treatment processes
3. Inspect and verify dimensions of Cupronickel pipe such as outer diameter, inner diameter, bolt holes, thickness, hub length, alignment and straightness
4. Ensure proper marking of Cupronickel weld neck flange which may include CuNi grade, pressure rating, standard specification, etc.

What is the CuNi Long Weld Neck Flange?

Figure 4 Weld neck flange – Photo credits: Wermac

It is the long neck that guides or fits on the copper nickel pipe thereby providing reinforcement.

As a result, the long neck of weld neck flanges provides additional reinforcement and strength to the pipe joint.

Unlike the standard weld neck flanges, this long neck makes it suitable for applications that require extra support such as expansion bend or extremely high pressure.

Copper Nickel Weld Neck Flange is made from which Material Grade?

Copper nickel weld neck flange is made from CuNi 90/10 or CuNi 70/30 grades.

What is the difference between DIN and EEMUA Cupronickel Weld Neck Flanges?

The DIN weld neck flanges have a pressure rating of 10 bar and 14 bar, with a Copper Nickel CuNi10Fe1,6Mn material. Moreover, the main standard specifications include:

• DIN 2632 Cupronickel weld neck flange
• DIN 2633 Cupronickel weld neck flange

On the other hand, EEMUA weld neck flanges have a pressure rating of 16 bar and 20 bar. They are available as EEMUA 145 copper nickel weld neck flanges.

The EEMUA 145 copper nickel weld neck flanges are available in UNS 7060X, C71500 and C70600.

How do you Connect Cupronickel Weld Neck Flange to Piping System?

Insert the Cupronickel weld neck flange into the pipe then use butt welding to fix it in position.

Which Types of CuNi Weld Neck Flanges are there?

1. Standard CuNi weld neck flange which is common in most butt welding fitting applications
2. Long CuNi weld neck flange for most vessel nozzle applications

What is Copper Nickel Flange Dimension Standards?

The dimension standards for copper nickel flange are according to:

• DIN2633
• DIN2632
• EEMUA 145
• EEMUA 234
• ANSI/ASME B16.5
• B 16.47 Series A and B
• 48
• BS4504
• BS 10
• EN-1092

For any custom dimensions, contact us now, Shihang is ready to help.