Threaded Flanges

Q: What is the threaded connection?

Threaded connections are often referred to as a process connection type . For Dwyer product specifications, this connection type is typically NPT (National Pipe Thread), which is an American standard thread. These connections allow products to be installed directly into piping or with the use of threaded fittings.

Made in China Threaded Flanges. We can produce flanges to ASME standards, as well as flanges that meet other standards. You can also provide drawings and let us produce custom flange products.

China Threaded Flanges

We provide flange products of various standards, such as ASME/ANSI B16.5, EN standards, etc. We also provide customized threaded flange products.

As a company with 25 years of flange production experience, we support all types of flanges, and we can give you the best product quality, the most reasonable price.

lewis Liu

Sales Manager

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This video gives an explanation of threaded flanges.

What is Threaded Flanges

Threaded flanges are non-welded flanges that attach to pipes using threads. The procedure converts the flange’s inner hole into pipe threads, allowing for threaded pipe connections without the need for welding.

Threaded flanges are easy to install and maintain, require no welding, and are suitable for pipelines where welding is not permitted on-site. The additional torque generated on the cylinder or pipe when the flange is deformed is minimal. However, the flange is thicker and more expensive, making it suitable for high-pressure pipeline connections.

Threaded Flanges Product Image Gallery

Here are various Threaded Flanges produced by YANHAO. You can click on the pictures to enlarge them. As a company with 25 years of flange production experience, YANHAO supports all types of flange production.

Standardized Threaded Flanges

Threaded Flanges are commonly standardized as ASME B16.5, with sizes ranging from 1/2 inch to 60 inches.
Sealing surface types include raised face (RF), flat face (FF), dimpled face (MFM), tongue and groove (TG), ring joint (RJ), and so on.
Applicable pressure classes include Class 150, 300, 400, 600, 900, 1500.

ASME B16.5 Threaded Flanges
Class 150	Class 600
Class 300	Class 900
Class 400	Class 1500

Customized Threaded Flanges

The following options are for you to customize. If you don’t have a design drawing, you can also consult our engineers and let us help you draw it.

size

Specified pipeline size, including flange ID and OD, thickness, bolt hole diameter, bolt hole distance, etc.

Material

Using specified material suitable for pipeline engineering according to your requirements.

Shape

can be customized with irregular flanges such as square flanges, and conical flanges, etc.

Connection

Threaded connection, welding connection, socket welding connection, etc., which can be selected.

Special Treatment

Special treatments such as surface coatings, anti-corrosion can be made according to your needs.

The customization process for flanges is generally as follows:

requirements
Confirmation

Communicate in detail to determine the requirements for flange size, material, pressure, connection method, etc.

Design drawings

Our professional engineers will design flange drawings for you. The drawings will specify the size, shape, thickness, etc. of the flange in detail.

Choose materials

Select suitable flange materials according to the requirements of the engineering project.

Customer confirmation

Send detailed information such as the designed drawings and materials to the customer for confirmation.

Processing sample

To ensure accuracy, first produce a sample according to the drawings and selected materials and send it to the customer for trial confirmation.

Production of bulk goods

After confirming the accuracy of the samples, proceed with mass production.

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About YANHAO

YANHAO is a flange manufacturer located in Hebei Province, China. It is one of the few professional flange suppliers in China.

We have many years of experience in flange production and have multiple flange production lines. We have sufficient stock of raw materials, rich inventory, fast delivery, and can ship within three days. At the same time, the price is affordable. You are welcome to consult and purchase!

In addition, we can provide a variety of bespoke flanges and pipe fittings. Customers can give drawings or samples, and our company will produce them to fit your specific requirements.

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Check Our Certificates

Certificate for Material Manufacturer: ISO 14001:2015

specifications & characteristics of Threaded Flanges

This table provides a comprehensive overview of Threaded Flanges, covering key specifications, characteristics, and additional considerations. Specific details and requirements may vary based on the chosen flange size, pressure rating, and material.

Specification/Feature	Description
Standard	ASME/ANSI B16.5 Threaded Flange.
Type	Threaded Flange – A type of flange with internal threads that allow it to be screwed onto the external threads of pipes or fittings, providing a secure connection.
Pressure Ratings	Available in different pressure classes, such as 150, 300, 600, 900, 1500, 2500, etc., to accommodate varying pressure requirements.
Size Range	Typically available in sizes ranging from 1/2 inches to 24 inches or larger, suitable for various pipe and equipment sizes.
Materials	ASME/ANSI B16.5 Threaded Flanges can be manufactured from materials like carbon steel, stainless steel, alloy steel, and more, chosen based on application requirements.
Facing Types	Common facing types include Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ), and Male and Female (M&F) facings, impacting sealing methods.
Bolt Hole Quantity and Diameter	The number and diameter of bolt holes vary with flange size and pressure rating, facilitating flange connection.
Connection Method	ASME/ANSI B16.5 Threaded Flanges create a secure connection by screwing the flange onto the external threads of pipes or fittings.
Application Areas	Threaded Flanges are commonly used in industries where a reliable threaded connection is required, such as plumbing, small-bore piping, and low-pressure applications.
Standards and Codes	ASME/ANSI B16.5 Threaded Flanges adhere to standards set by the American National Standards Institute (ANSI) and nominal pipe size (NPS) standards, such as ANSI B16.5.
Seal Types	Threaded Flanges commonly use gaskets or O-rings for sealing, with the choice of seal type depending on the application and pressure rating.
Accessories and Attachments	Some applications may require additional components such as flange gaskets, bolts, nuts, and flange cover gaskets.
Inspection and Testing	ASME/ANSI B16.5 Threaded Flanges typically undergo a series of inspections and tests to ensure they meet quality and performance requirements, in compliance with standards.
Marking and Certification	Threaded Flanges should be marked with the manufacturer’s identification, size, class, material, and other relevant information. Some flanges may require specific certifications such as PED or ASME.
Installation and Maintenance	Proper installation and regular maintenance of Threaded Flanges, including thread integrity, bolt torque, flange face cleaning, and seal replacement, are crucial for system integrity and performance.
Application Standards	In specific industries and applications, there may be industry-specific Threaded Flange application standards that need to be adhered to for safety and performance.

ASME/ANSI B16.5 Threaded Flanges Main Features and Specifications Table

FAQs About Threaded Flanges

ASME/ANSI B16.5 Threaded Flanges are widely used in low-pressure piping systems, as no welding is involved while connecting the flanges to pipes or other equipment. However, the Female Threaded flange may be welded around the joint after assembly, but it is not considered a satisfactory method of increasing its applications.

Threaded connections are almost the polar opposite of flange connections. Rather than fitting pieces together using multiple parts, threaded connections are rimmed with matching grooves, one on the outside of a piece and the other on the inside.

The key types of flanges are the welding neck, long welding neck, slip-on, socket weld, lap joint, and threaded, and blind flanges. In addition to these standard flanges, some special ones exist, called Weldoflange/Nipoflange and Elboflange, swivel flange, expander/reducer flange, and orifice flanges.

The threaded flange design (also called a ‘screwed flange’) uses a screw thread to connect the flange to a pipe. A male thread is cut onto a pipe end whilst a female thread is cut into the bore of the flange; the male threaded pipe is then screwed into the female threaded flange.

A union is a threaded fitting that allows the pipework to be separated and reconnected without any horizontal movement in the pipe. It can be a standalone pipe fitting connecting two pieces of pipe, or an integral part of another fitting (such as a ball valve) that allows it to be separated.

Threaded connections are often referred to as a process connection type. For Dwyer product specifications, this connection type is typically NPT (National Pipe Thread), which is an American standard thread. These connections allow products to be installed directly into piping or with the use of threaded fittings.

Threaded Flanges