ASME B16.5 Copper Nickel Threaded Flange

Shihang Copper Nickel Threaded Flange is an ASME B16.5 compliant flange, made from C70600 or C71500 material. Unlike Shihang Copper Nickel Slip on Flange, Shihang Copper Nickel Threaded Flange bore has tapered threads.

They may have a flat face or a raised face.

  • Raw Material:C71500,C70600
  • Threaded Type: NPT, BSPT
copper nickel threaded flanges
opper nickel threaded flanges

Copper Nickel Threaded Flange Specifications

Specifications : ASTM B151 UNS C70600, CuNi10Fe1.6Mn, 7060X,C71500

Dimensions :ASME B16.5

Size : 1/2″ to 24”

Threaded: BSPT, NPT

Class / Pressure : 150#, 300#

Flange Face Type : Flate Face (FF), Raised Face (RF),

Grades : Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500)

opper nickel threaded flanges

Copper Nickel Threaded Flange Description

Copper Nickel Threaded Flange

Shihang Copper Nickel Thread Flange is durable and reliable, precisely fabricated with practical applications in mind. Dimensional tolerance and chemical composition accurately controlled, making Shihang Copper Nickel Threaded Flange a perfect choice for extremely high pressure and small diameter piping system applications.

Shihang Copper Nickel Threaded Flange is designed for copper nickel pipes with external threads. It is easy to install, no need for welding, assemble Shihang Copper Nickel Threaded Flange by slowly screwing the copper nickel pipe or flange.

Depending on unique and specific piping applications, Shihang Copper Nickel Threaded Flange is available in different thickness and pressure ratings, sizes (1/2″-24″) and threading types (NPT, BSPT).

Shihang offers unlimited possibilities with over 20 years hands-on experience in the copper nickel threaded flange industry.

We offer custom engineering solutions for all copper nickel threaded flange solutions by providing CAD drawing, investing in high-tech CNC machines, strict dimension, and tolerance control.

Our copper nickel threaded flanges are trusted by over 500 companies globally, due to our commitment to quality control, fast turnaround and exemplary technical support.

Shihang has rich experience in producing standard and custom copper nickel threaded flange, and we issue a quality certificate for every copper nickel threaded flange.

If you have any questions or urgent orders for copper nickel threaded flange, Shihang is ready to help.

Talk to us today; our technical support is available 24/7.

Copper Nickel Threaded Flange: The Ultimate FAQ Guide



What is an ASME B16.5 Compliant Copper Nickel Threaded Flange?

These are special types of copper nickel flanges where the internal bore has threads that match the male threads of copper nickel pipes.

Additionally, these copper nickel pipe flanges conform to the ASME B16.5 standard specifications.

CuNi Threaded Flange

Figure 1 CuNi Threaded Flange

Is there a Difference between Cupronickel Threaded Flanges and Screwed Flanges?


Due to the existing threads and the installation procedure, at times you can also refer to Cupronickel threaded flange as Cupronickel screwed flange.

Cupronickel Threaded Flange is made from which Material Grade?

CuNi threaded flange is made from either:

  • Copper Nickel 90/10 (C70600 ), or
  • Cupro Nickel 70/30 (C71500)

Where is Cupronickel Threaded Flanges used?

You can use Cupronickel threaded flanges with pipes having external threads. It is because you will use the threads when connecting flanges to the piping system.

You can use the copper nickel threaded flanges in shipbuilding, desalination plants, power generation plants, offshore oil platforms, water piping, etc.

Furthermore, Cupronickel threaded flange is suitable in:

  1. Highly explosive or flammable areas where welding can cause fire – with CuNi threaded flanges, you don’t need welding
  2. Small diameter and high-pressure applications

How do you Connect CuNi Threaded Flange to Pipe?

First, you need a copper nickel pipe with matching external threads to that of the CuNi threaded flange.

Screw-in the Cupronickel threaded flange onto the copper nickel pipe.

What are the Benefits of Copper Nickel Threaded Flange?

  1. Easy to install and uninstall – simply screw or unscrew the copper nickel threaded flange
  2. Provides tight and secure flanging mechanism in the piping system
  3. No need for any form of welding since the flange uses threads to connect the piping system

What is the difference between Cupronickel Threaded Flange and Slip on Flange?

Cupronickel threaded flange is similar to Cupronickel slip on flange on virtually all aspects.

However, Cupronickel threaded flange has threads on its internal bore. This is not the case for the Cupronickel slip on flange.

CuNi Threaded flange vs CuNi slip on flange

Figure 2 CuNi threaded flange vs CuNi slip on flange

Which Thread Types Do CuNi Threaded Flanges come with?

They come in either NPT or BSPT thread types.

Remember, the National Pipe Taper (NPT) is an American standard although it has been adopted globally.

On the other hand, British Standard Pipe Taper (BSPT) is common within the European economic region although it has been adopted globally too.

The difference between NPT and BSPT is the configuration of the thread form and pitch.

What is Copper Nickel Threaded Flange Specifications?

Whenever you are specifying the copper nickel threaded flange, the focus should be on the following:

  1. Material grade
  2. Thread type
  3. Dimension specification
  4. Class or pressure rating
  5. Flange face type

How many Types of Copper Nickel Threaded Flanges are there?

Broadly, you can classify copper nickel flanges depending on the location of the threads.

You can choose from CuNi plain threaded flanges, CuNi male threaded flanges or CuNi female threaded flanges.

Does Cupronickel Threaded Flange has Flat Face and Raised Face?


You can get a flat face (FF) or a raised face (RF).

What are the Characteristics of Copper Nickel Threaded Flange?

  1. Threads for connecting flange to the pipe system
  2. High stress and pressure resistance
  3. Resistance to biofouling, corrosion, and erosion
  4. Easy to install and uninstall in the piping system

Are CuNi Threaded Flanges suitable for Environment with Thermal Cycles?


The thermal cycles will loosen the copper nickel threaded flange.

It is for this reason that copper nickel threaded flanges are recommended for applications with stable working temperature.

How many Bolt Holes should CuNi Threaded Flanges have?

The number of bolts will depend on the size and pressure rating of the copper nickel threaded flange.

For instance, a large CuNi threaded flange will have more bolt holes and vice versa.

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