Copper Nickel Composite Weld Neck Flange

Shihang Copper Nickel Composite Weld Neck Flange is an alloy of Cu, Ni, Fe, Mn, Pb, S, C, P and Zn, mixed in different quantities, for high stress, low pressure and efficient stress transfer from flange to pipe.

Shihang precisely machines Copper Nickel Composite Weld Neck Flange to match Cupro Nickel Pipe diameter, reducing erosion and turbulence for efficient fluid flow.

Shihang Copper Nickel Composite Weld Neck Flange comes in different thickness and pressure ratings, according to EEMUA 145 and DIN 86037.

 

 

Our Copper Nickel Composite Weld Neck Flange feature an inner flange (also referred to as a collar) and backing flange (also referred to as loose flange). The collar flange is copper nickel material, while the backing flange is carbon steel.

According to specific applications, Shihang Copper Nickel Composite Weld Neck inner flange grades range from ASTM B151 UNS C70600, 7060X, CuNi 90/10, CuNiFer, CuNi10fe1.6mnASTM B151 UNS C71500, CuNi 70/30, CuNiFer to CuNi30fe1.6mn.

Shihang Copper Nickel Composite Weld Neck Flange outer flange grade is available as A105N with galvanized.

For easy installation, Shihang Copper Nickel Composite Weld Neck Flange collar is welded with copper nickel pipes, while the backing flange can be active.

Shihang Copper Nickel Composite Weld Neck Flange collar remains the sealing surface, while the backing flange press the assembly. Since the collar is blocked, backing flange is not in contact with the media.

Compared to other brands, Shihang Copper Nickel Composite Weld Neck Flange offers cost effective flanging solution for low pressure and non-critical applications.  It is the best copper nickel composite weld neck flange for shipment applications.

Shihang is a professional Copper Nickel Composite Weld Flange manufacturer with over 20 years’ experience, and the ability to produce a range of pipe flange types.

Depending on client requirements, Shihang produces Copper Nickel Composite Weld Pipes with tight tolerances, conforming to the ASME/ANSI, DIN, JIS and EEMUA standards.

With over 25 sets of CNC Machines, Shihang will handle all your urgent Copper Nickel Composite Weld Neck Flange needs.

For special orders of custom Copper Nickel Composite Weld Neck Flange, Shihang engineers help in CAD drawing and material grade selection process.

Our strict quality control (QC) ensures you get the best Copper Nickel Composite Weld Neck Flanges. We provide EN 102043.1 Certificate and other third party inspection certificates.

Through our rapid response customer service available 24/7, we can custom make you Copper Nickel Composite Weld Neck Flange.

Shihang, will answer all your questions on Copper Nickel Composite Weld Neck Flange.

Feel free to contact our team today.

Copper Nickel Composite Weld Neck Flange: The Ultimate FAQ Guide

 

How many Standards of Copper Nickel Composite Weld Neck Flange are there?

Cupronickel composite weld neck flanges come in the following main standards specifications:

1. DIN 86037
2. EEMUA 145

• EEMUA 234

Where the DIN 86037standard specification is available for both inner flange and an outer flange. Moreover, the EEMUA 145 is available for inner flange, long inner flange, and an outer flange.

Figure 1 CuNi composite weld neck flange

What is Copper Nickel Composite Weld Neck Flange?

It is a special type of copper nickel flange with an inner flange, also called collar or stub end and outer flange also referred to as backing flange or loose flange.

The inner flange is made of copper nickel alloy while the outer flange is carbon steel.

Figure 2 CuNi Composite weld neck flange

The design of the CuNi composite weld neck flange is such that the backing flange has holes for bolts. On the other hand, the collar has a protruding rim.

What is the difference between Short and Long Inner Flange of Composite Weld Neck Flange?

Figure 3 Flange dimensions – Photo credits: Piping Engineer

The long inner flange has a longer/larger overall length through hub (Y) than the short inner flange.

Of course, both the long inner flange and short inner flange are made of a copper nickel alloy. Besides, they come in both EEMUA 145 and DIN 86037 dimensional standards.

How do you Specify Copper Nickel Composite Weld Neck Flange?

You can use the following parameters to specify CuNi composite weld neck flange:

1. Material grade of both inner flange (CuNi10Fe1.6Mn, 7060X, ASTM B151 UNS C70600) and outer flange (A105N with Galv.)
2. Dimension standard specification which is EEMUA 145/EEMUA 234 and DIN 86037

• Pressure rating

1. Raised face or flat face
2. Size
3. Thickness

With this information, you will definitely get a Cupronickel composite weld neck flange that meets the unique specifications of your application.

Which Material is Copper Nickel Composite Weld Neck Flange made of?

The outer flange of the composite weld neck flange is made from A105 carbon steel. However, you can get the epoxy coated or galvanized options.

Figure 4 Outer flange

The inner flange of composite weld neck flange is made from different grades of copper nickel alloy such as:

• ASTM B151 UNS C70600
• CuNi 90/10
• CuNi 70/30
• 6mn
• 7060X
• CuNiFer
• 6mn

You can choose copper nickel alloy grade for the inner flange depending on dimension standard specifications and applications.

Figure 5 inner flange

How does Loose Flange and Collar of CuNi Composite Weld Neck Flange Compare?

Loose flange is made from A105 carbon steel with options for an epoxy coating or galvanized while the collar is copper nickel alloy grade.

The loose flange has holes for bolts which is not the case for the collar.

Depending on the type of installation, you can weld collar to copper nickel pipe. However, the loose flange can always remain to be active.

Moreover, the collar acts as a sealing mechanism. On the other hand, the loose flange will always press the entire assembly in the piping system.

The collar is always in contact with the media, which is not the case for the loose flange.

Can CuNi Composite Weld Neck Flange Cause Turbulence in Fluid Flow?

The design of the CuNi composite weld neck flange guarantees laminar and seamless flow or transition of fluid with virtually no turbulence.

Consequently, it reduces the possibility of copper nickel pipe or fittings erosion.

How does Copper Nickel Composite Weld Neck Flange Work?

Composite weld neck flange has a long tapered hub, which is the collar.

You can then join the flange to a copper nickel pipe or fitting by welding the tapered end pipe. At the same time, the loose flange will remain to be in “active”.

In this case, the collar with the long tapered hub will act as a sealing mechanism. Also, the loose flange will press them to the piping system.

You can use bolt holes on the loose flange to join the other pipe components.

This forms a reliable joint for a seamless flow of fluid.

What is Cupronickel Composite Weld Neck Flange Used for?

Cupronickel composite weld neck flange is suitable for applications that require:

• Affordable joining mechanism
• Anti-corrosion piping system
• Erosion resistant piping system
• The piping system that can withstand high stress

Besides, it is suitable for high-pressure applications that require unrestricted flow. You can use it for high to low-temperature applications.

This makes it a suitable flange in the shipping industry, offshore mining, desalination plants, etc.

However, composite weld neck flange is not suitable for critical applications.

How do you Install CuNi Composite Weld Neck Flange in Pipes?

You will weld the tapered hub of the collar to the copper nickel pipe. Then is the loose flange will press the entire assembly together.

Use bolt and nuts to secure the entire assembly together.

How does DIN and EEMUA Cupronickel Composite Weld Neck Flange Compare?

Figure 6 Composite weld neck flange

1. Both the DIN 86037 and EEMUA 145/EEMUA 234 are European dimensional specification standards. However, they have been adopted globally in the copper nickel pipe and fittings industry.
2. DIN 86037 and EEMUA 145 have specifications for both inner and outer flange.

• For the EEMUA 145 standard inner flange, the pressure rating is 16bar and 20bar. However, for DIN 86037 standard, the inner flange has a pressure rating of 10 bar and 14bar.

1. For inner flange, the size of DIN 86037 and EEMUA 145 CuNi composite weld neck flanges range from DN15 to DN 500, with copper nickel alloy grades as the material.
2. DIN 86037 outer flange has a pressure rating of 10 bar and 14 bar while EEMUA 145 outer flange has a pressure rating of 16 bar and 20 bar.
3. The material for outer flange in both EEMUA 145 and DIN 86037 is A 105 carbon steel with an option for an epoxy coating or galvanized surface.

What are the Characteristics of CuNi Composite Weld Neck Flange?

Some of the main characteristics of Cupronickel weld neck flange are:

• Resistance to fluctuating temperature conditions
• Excellent anti-corrosion properties
• High stress-resistant
• Uniform and efficient stress transfer from pipe to flange
• Ability to resist erosion
• Excellent mechanical properties
• Resistant to biofouling

You can only benefit these desirable characteristics when you import composite weld neck flange from reliable trusted manufacturers.

Such manufacturers control chemical properties and mechanical properties of flanges. Moreover, they also issue EN 10204 3.1 Certificate.