Shihang CuNi 70/30 Flanges

Shihang CuNi 70/30 Flanges

Shihang is a prominent and certified manufacturer of excellent quality CuNi 70/30 flanges to support your business. You can rely on Shihang’s two decades of experience in manufacturing and supplying Cupro Nickel to different industries throughout the world.

In China, Shihang is a progressive firm that has the largest state of the art technology and facility. Shihang CuNi 70/30 flanges or known as C71500 flanges are designed and manufactured from copper alloy and nickel.

We can provide you an extensive range of CuNi 70/30 flanges to suit your requirements machined from our inhouse stock. Our Shihang CuNi 70/30 flanges are available in different sizes and types of finished and semi-finished copper-nickel blind flanges, copper-nickel flat flanges, copper-nickel steel threaded flanges, copper-nickel high hub flanges, etc.

We can expertly manufacture CuNi 70/30 (C71500) flanges which offer superior resistance to corrosion. That is why CuNi 70/30 flanges are great for marine saltwater atmospheres. In addition, they are also resistant to salts, brine water, organic compounds and dilute non-oxidizing acids.

Further, Shihang CuNi 70/30 flanges possess good ductility, castability, and weldability. All of our Shihang CuNi 70/30 flanges are readily cold works, welded, and fabricated without any exceptional material considerations.

During the production, we have set several inspections and stringent testing to achieve excellent quality CuNi 70/30 flanges. We also provide material test certificates for you to ensure the quality of the product.

You can avail of our Shihang CuNi 70/30 flanges at various specifications that vary in thickness, sizes, dimensions, grades, and many more. All of Shihang CuNi 70/30 flanges are manufactured and designed in compliance with international and national standards.

We are looking forward to business partner investor for our business. We have a wide range of Shihang CuNi 70/30 flanges products perfect for your startup business.

For your inquiries, please feel free to contact us now!

CuNi 70/30 Flanges: The Complete FAQ Guide

This guide covers all the critical aspects about CuNi 70/30 flanges such as chemical composition, classification, benefits, applications, surface finishes, packaging, joining, certifications, standard specification and many more.

So, if you want to be an expert in CuNi 70/30 flanges, read this guide:

What are CuNi 70/30 Flanges?

CuNi 70/30 flange is a type of pipe flange in which the main compounds are copper and nickel.

CuNi 70/30 flanges have a high proportion of copper compared to nickel.

Their use in various applications is due to their unique chemical and physical properties.

CuNi 70 30 Flange

Which Chemical Elementsare Present in CuNi 70/30 flanges?

The main chemical compounds available in CuNi 70/30 flanges are:

Element	Cu-Ni 70/30
Copper	65.0minimum
Lead	0.05 maximum
Manganese	1.0 maximum
Iron	0.4-1.0 maximum
Zinc	One maximum
Nickel	29-33 maximum

 

Where can you use CuNi 70/30 Flanges?

Industries that use CuNi 70/30 flanges include:

• power generating companies
• Shipbuilding industries
• Offshore extraction industries
• Food processing industries
• Desalination plants

What are the Different Types of CuNi 70/30 Flanges?

CuNi 70/30 flanges are available in the following types:

· CuNi 70/30 Threaded Flange

CuNi 70/30 flange features a hollow structure having threads on its ends, which can either be male or female.

CuNi 70/30 Screw flange is another name for this type of flange.

Using these flanges should be in piping systems that have threads.

The threads should fit that of your CuNi 70/30 threaded flange.

Typical applications of these flanges include shipbuilding, power generation plants, power plants, and water piping.

This is because of these applications:

a. Have a smaller diameter while fluid flows through under high pressure.

b. It can easily catch fire or quickly explodes if you are to weld the connections.

· CuNi 70/30 Lap Joint Flange

CuNi 70/30 flange has a raised surface and a machined groove for compatibility with a ring gasket.

Using these flanges is critical in applications:

a. That requires regular assembling and disassembling procedures.

b. That is highly corrosive.

c. That has complex installation procedures.

· CuNi 70/30 Socket Weld Flange

CuNi 70/30 socket weld flange is characterized by a bore that has a shoulder referred to as a counterbore or a recessed section.

This section is critical in determining the depth of your pipe insertion.

A CuNi 70/30 socket weld flange has two holes.

One is the counterbore, whose diameter is more significant than that of the outer diameter of your pipe.

The diameter of the second hole is the same as that of your pipe.

Its use is common in:

a. Applications where using threaded CuNi can result in leakages due to temperature and pressure fluctuation

b. Aligning of the piping system is vital

c. The pipes have a smaller diameter while fluid flows under high pressure.

d. You cannot weld the connection point’s inner part.

· CuNi 70/30 Blind Flange

The surface of CuNi 70/30 flange lacks holes.

However, there are bolt holes on the sides for tightly connecting your flange in position.

Lack of surface holes ensures smooth fluid flow. You can use this flange when:

a. You have to separate a section of the piping application

b. You have to separate a piece of equipment within the piping system

c. You have to clean or repair your piping application.

· CuNi 70/30 Composite Slip-on Flange

This type of flange consists of two materials.

The inner material comprises of carbon steel and the outer part consisting of Cupronickel.

You can refer to the inner part as a collar end or a sub.

Also, the use of this flange is in systems that have low operating pressure and temperature.

Industries that use CuNi 70/30 composite slip-on flange include power generation, offshore oil plants, and sewerage systems.

What are the Benefits of CuNi 70/30 Flanges?

The key benefits you derive from using CuNi 70/30 flanges include:

• They are simple and easy to connect.
• CuNi 70/30 flange’s connection istight and does not leak.
• Their thick design makes them last longer. Their unique properties such as anti-corrosiveness and anti-fouling facilitate their durability
• They have a versatile usage, especially in applications that have varying operating temperature and pressure.
• They have a simple maintenance process due to their unique characteristics, like anti-microbial growth.

What is the Manufacturing Process of CuNi 70/30 Flanges?

The production process of one type of CuNi 70/30 flanges is different from another.

As such, based on the kind of CuNi 70/30 flanges, you can have the following fabrication processes:

1) CuNi 70/30 Threaded Flange

CuNi 70/30 Threaded Flange

CuNi 70/30 threaded flange has the following production steps:

• Inspecting the quality of raw materials for CuNi 70/30 threaded flange
• Analyzing of chemical compounds and their properties
• Cutting of the CuNi 70/30 bar into the specified dimensions such as the weight, and shape.
• Forging of the CuNi 70/30 bars into CuNi 70/30 threaded flange
• Heat treatment
• Roll forging
• Surface finish application including rust prevention
• Final inspection of the quality CuNi 70/30 threaded flange
• Packing of the CuNi 70/30 threaded flange ready for shipment.

2) CuNi 70/30 Composite Slip-on Flange

CuNi 70/30 Composite slip on flange

The following stages are critical in the manufacturing of CuNi 70/30 composite slip-on flange:

• Inspecting the quality of both the inner and outer material of the CuNi 70/30 composite slip-on flange
• CuNi 70/30 bar cutting according to the required specifications
• Carbon steel material cutting according to the available specifications
• Forging of the CuNi 70/30 bar to create a stub end
• Forging of the outer part of CuNi 70/30 composite slip-on flange. This includes the fabrication of bolt holes.
• Heat treatment of inner part of the CuNi 70/30 composite slip-on flange
• Marking of the CuNi 70/30 composite slip-on flange and carrying out final inspection. Such marking includes dimensional standards, material grade, and pressure rating.
• Packing of the CuNi 70/30 composite slip-on flange ready for shipment.

3) CuNi 70/30 Socket Weld Flange

To manufacture CuNi 70/30 socket weld flange, you have to:

CuNi 70/30 socket weld flange

• Inspect the quality of raw materials
• Analyze the chemical composition of the CuNi 70/30 bar
• Cutting of the CuNi 70/30 bar to the given standards
• Forging of the CuNi 70/30 bar to get your CuNi 70/30 socket weld flange while controlling the temperature.
• Heat treatment of the CuNi 70/30 socket weld flange
• Final inspection of the quality of your CuNi 70/30 socket weld flange, including dimensional markings and standard specifications.
• Packing of the CuNi socket weld flange ready for shipment.

4) CuNi 70/30 Blind Flange

CuNi 70 30 Blind Flange

Manufacturing of CuNi 70/30 blind flange consists of:

• Quality inspection of the raw materials
• Cutting od the CuNi 70/30 bar according to the required specifications
• Forging of the CuNI 70/30 to create a blind flange
• CuNi 70/30 blind flange machining through bolt hole drilling.
• Heat treatment of the CuNi 70/30 blind flange
• Final inspection and marking of the CuNi 70/30 blind flange. Such markings include dimensional standards, material grade, and pressure rating.
• Packing of CuNi 70/30 blind flange ready for shipment.

What is the Comparison between CuNi 90/10 Flanges and CuNi 70/30 Flanges?

CuNi 90/10 and CuNi 70/30 flanges have the same chemical compounds.

However, the quantity of these compounds differ, CuNi 90/10 flanges has a higher amount of copper than CuNi 70/30 flanges.

CuNi 70/30 flanges have a higher Nickel quantity than CuNi 90/10 flanges.

The variance in the quantity of these compounds facilitates their use in different applications.

For instance, CuNi 70/30 flanges ideal for use in high demanding salty applications due to its non-corrosive characteristics.

This is because of the high nickel quantities.

CuNi 90/10 flanges conduct electricity faster compared to CuNi 70/30 flanges.

This is due to the high amount of copper present in CuNi 90/10 flanges.

How should you Specify CuNi 70/30 Flanges?

Specifications of CuNi 70/30 flanges entails identifying the following:

The necessary dimensions such as DIN86037, DIN86033, DIN2632 or EEMUA 145

• The relevant standards such as EEMUA flanges, DIN flanges, JIS flanges
• The CuNi 7/30 flange face type which is either raised or flat
• The type of CuNi 70/30 flange
• The CuNi 70/30 size which ranges between 0.5” to 24”.
• Operating pressure and class

Which Surface Finishes are available for CuNi 70/30 Flanges?

Surface finish enhances the quality and durability of your CuNi 70/30 flanges.

· Smooth Finish

The smooth surface finish leaves no spot or markings on the surface.

Also, the creation of finish is through the use of a revolving spiral groove with a tool that is round, having a radius of 0.8 millimeters.

Each rotational cycle is 0.3 millimeters per cycle, creating a 0.05millimeter surface depth.

· Stock Finish

A stock surface finish uses a round-shaped tool to create a gasket surface with a spiral groove.

This tool usually has a 1.6mm radius, and a has 0.8mm per cycle revolution.

The cycle revolution forms a rough surface of between 3.2 and 12.5mm with a depth of .15milimeter.

·  Spiral Serrated

The spiral serrated surface finish option utilizes a perpendicular tool in creation of non-ending zig-zag grooves.

These groves form a “V” design, which is zigzag that is 45 degrees.

The spiral serrated surface finish is similar to a stock surface finish apart from the “V” design.

· Coldwater Finish

Coldwater finish leaves your surface with a glossy appearance.

You can select this type of finish if you are installing two different metal surfaces where gasket usage is not useful.

· Concentric Serrated

This type of surface finish uses a right-angled tool to create concentric grooves.

These concentric grooves have equal and spaced serration over the CuNi 70/30 flange surface.

What is the Installation Process of CuNi 70/30 Flanges?

The way you install your CuNi 70/30 flange varies depending on its type.

Besides, the typical installation process that you can have for CuNi 70/flanges are:

· CuNi 70/30 Composite Slip-on Flange

For you to install CuNi 70/30 composite slip-on flange properly, you have to insert it into your pipe.

As you do this, remember to keep the backing flange open.

The next step is welding both the inside and outside of the CuNi 70/30 composite slip-on flange.

As you do this, you have to press the backing flange for a tight joint for your composite slip-on flange.

Before you start operating, you have to inspect any leakages available around the joint.

· CuNi 70/30 Threaded Flange

A common type of connection that involves checking on the kind of ends for your CuNi 70/30 threaded flange and your pipe.

There are two types of threaded ends, that is, male and female.

If your threaded flange is male, then your pipe should be female and vice-versa.

You also have to check on the diameter of the CuNi 70/30 threaded flange and that of your pipe.

They should fit into each other to minimize any leakage.

You then screw the two ends tightly to give you a leakproof connection.

· CuNi 70/30 Blind Flange

The vital thing to check when connecting CuNI 70/30 blind flange is the specification of the flange, the gasket and the pipe.

That is, they should have equal holes, and their sizes should also be the same.

Start by placing the gasket on the CuNi 70/30 threaded top and inserting it on the pipe.

Insert the bolts on the bolt holes and tighten your connection.

· CuNi 70/30 Socket Weld Flange

CuNi 70/30 socket weld flange connection uses the right diameter size for the CuNi pipe, CuNi 70/30 composite flange, and the gasket.

They should ideally fit into each other.

Take an end of the CuNi pipe and insert it to the opposite end of the CuNi 70/30 socket weld flange while pushing it.

Push until you leave just enough space between it and the socket weld’s shoulder.

This space is for contraction and expansion of both CuNi 70/30 socket weld flange and the pipe system.

The next step involves the welding of the upper parts of the CuNi 70/30 socket weld flange and the pipe.

Before you start operating your piping system, check for any leakages around the connection point.

What are the Considerations when Purchasing CuNi 70/30 Flanges?

Proper selection of CuNi 70/30 flanges is critical in ensuring you have suitable and leakproof connections.

It also enhances the function of your piping application.

Among the key determinants when choosing your CuNi 70/30 flanges are:

· Type of CuNi 70/30 Flange

Your applicational needs to determine the type of CuNi 70/30 flanges to select this should offer proper piping requirements while ensuring there is smooth fluid flow.

· Size of the CuNi 70/30 Flanges

The right size of CuNi 70/30 flanges gives a proper connection for the piping application.

This reduces leaking even in a situation of temperature and pressure fluctuation.

The right size should be in terms of the diameter, the design, and the length.

· Quality Standards

A quality CuNi 70/30 flange gives your piping system the stability and functionality it deserves.

This is because it adheres to the given standards.

Purchasing from a reliable CuNi 70/30 flange manufacturer reduces the chances of buying poor quality.

· Price

The market price of CuNi 70/30 flanges differ depending on the manufacturer.

Your budget should also determine where to purchase your CuNi 70/30 flanges.

However, price should not only guide you. Regardless of the cost, quality should be paramount.

· Operating Pressure and Temperature of CuNi 70/30 Flanges

CuNi 70/30 flanges that you select should be able to withstand the maximum operating temperature and pressure of your piping application.

If you choose a CuNi 70/30 flange with inappropriate pressure and temperature can affect the fluid flow within the joint.

Each CuNi 70/30 flanges has its pressure and temperature ratings typically.

You need to check on these markings before you decide on which flange to select.

How do you get the Diameter of CuNi 70/30 Flanges?

 Measure diameter of flanges

To get the diameter measurement for your CuNi 70/30 flange, you need a tape measure.

The inner part is useful in getting the right diameter for your CuNi 70/30 flange.

Measure the circumference of our CuNi 70/30 flange using the tape measure then derive the diameter by dividing the circumference using pie (3.14).

What is the Packaging Process for CuNi 70/30 Flanges?

A proper CuNi 70/30 flange packaging should prevent abrasion that affects their quality and durability.

The appropriate packaging material should minimize any reaction of the CuNi 70/30 flange to the environment.

When packing, you CuNi 70/30 flange, you need to have end caps on the CuNi 70/30 flange endings.

You then have to wrap each flange using nylon material.

Nylon material prevents abrasion that affects the quality of your CuNi 70/30 flanges.

The next step is packing these flanges in boxes.

These boxes can either be wooden boxes, wooden crates, or steel boxes ready for shipment.

Which Welding Methods can you use onCuNi 70/30 Flanges?

Proper CuNi 70/30 flange welding gives stability to your piping connection while ensuring there is no leakage.

For this to happen, you can weld using either following methods:

• Manual metal arc welding
• Tack welding
• Gas shielded tungsten arc
• Gas shielded metal arc

What is the Comparison between CuNi 70/30 Flange and CuNi 70/30 Fitting?

The similarity between the two is they both function as pipe accessories by connecting two or more pipes.

They, however, differ on their structure as CuNi 70/30 flanges are more flexible compared to CuNi70/30 flanges

CuNi 70/30 flanges are more durable compared to CuNi 70/30 due to their thick structure.

The presents of bolt holes in CuNi 70/30 flanges enhances their connection mechanism, giving it a tight connection.

CuNi 70/30 flanges, however, lack these holes, thereby affecting their connections by making them susceptible to leakages.

Do you Issue Certificates for CuNi 70/30 Flanges?

Yes.

We do issue certificates for CuNi 70/30 flanges.

Our certificate includes EN 102043.1 certificate, which we issue to all our CuNi 70/30 flanges.

This certificate ensures the CuNi 70/30 flanges adheres to the client’s specifications and international standards.

We also allow for third party inspections from such organizations like BV, SGS, ABS, etc.

How do you Inspect the Quality of CuNi 70/30 Flanges?

Quality inspection is a necessary aspect of manufacturing the right CuNi 70/30 flanges.

Inspection starts from checking on the raw materials up to the final process.

Each fabrication step meets the quality measures.

Among the quality inspection standards that your CuNi 70/30 flanges should pass through include:

• Magnetic particle quality inspection
• Tensile quality inspection test
• Ultrasonic quality inspection test
• Proof quality inspection test
• Visual quality inspection test

CuNi 70/30 Flanges should adhere to which Quality Standards?

CuNi 70/30 flanges should meet the requirements of quality standards like:

• DIN Standard
• ASME/ANSI B16.9
• EEMUA 146/EEMUA 234

How do you Compare ANSI and DIN CuNi 70/30 Flanges?

ANSI and DIN CuNi 70/30 flanges are similar in structure but differ in their area of application.

DIN CuNi 70/30 flanges are standards that govern European markets.

ANSI CuNi 70/30 flanges are standards that govern American markets.

In short, as you import CuNi 70/30 flanges from China, consider everything we have mentioned in this guide.

Still, if you have any questions or inquiries, Shihang engineers are here to help.