Weld Neck Flanges
Made in China welding neck 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 Weld Neck Flanges
We provide flange products of various standards, such as ASME/ANSI B16.47, B16.5, EN standards, etc. We also provide customized weld neck 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
What is Weld Neck Flange
A weld-neck flange has a neck and a round tube transition. It is attached to a pipe, so it is also called high neck flange, long neck flange, or short for WN flange.
Long neck form gives it extra strength and stability, and it can be used in many industrial settings.
It is a type of flange that is made to work in places with high temperatures and pressure. It can be used for oil transportation pipelines, ship pipeline systems, and the transport of raw materials in chemical plants, among other things.
Because it has a high structural strength, good sealing performance, resistance to corrosion, and the ability to withstand high temperature and pressure.
Usually weld neck flange can be divided into neck butt welding flange and neck flat welding flange according to the welding process. You can view various weld neck flanges we have produced through the gallery below.
Weld Neck Flange Product Image Gallery
Here are various weld neck 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 Weld Neck Flanges
- Weld neck flange is commonly standardized as ASME B16.5 and ASME B16.47, with sizes ranging from 1/2 inch to 60 inch.
- 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 75, 150, 300, 400, 600, 900, 1500, 2500.
Customized Weld Neck 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.
More reading:
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.
Check Our Certificates
specifications & characteristics of Weld Neck Flange
This table provides a comprehensive overview of Weld Neck 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 |
|---|---|
| Appearance | Weld Neck Flange is disk-shaped, in which there is a raised neck called flange neck, flange neck around a number of bolt holes. |
| Pressure Ratings | Class15 (PN16), Class300 (PN25),Class600 (PN50), Class900 (PN64), Class1500 (PN260), Class2500 (PN420), etc. |
| Size Range | Typically available in sizes ranging from 1/2 inches to 48 inches or larger, suitable for various pipe and equipment sizes. |
| Materials | 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 | Weld Neck Flanges are butt-welded to the pipe, providing a strong and leak-resistant connection. |
| Application Areas | Oil and gas, petrochemical, power generation, and more for connecting high-pressure piping systems. |
| Standards and Codes | Common standards are ASME/ANSI B16.47 and B16.5. You can also customize it at YANHAO. |
| Seal Types | Weld Neck 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, flange covers, or flange cover gaskets. |
| Inspection and Testing | Weld Neck Flanges typically undergo a series of inspections and tests to ensure they meet quality and performance requirements, in compliance with standards. |
| Marking and Certification | Weld Neck 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 Weld Neck Flanges, including weld integrity, bolt torque, flange face cleaning, and seal replacement, are crucial for system integrity and performance. |