Blind Flanges
Made in China Blind 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 Blind Flanges
We provide flange products of various standards, such as ASME/ANSI B16.47, B16.5, EN standards, etc. We also provide customized Blind 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 Blind Flanges
A blind flange, also known as a blind plate, is a flange without main hole, used to close the end of a pipe system or as an end cover for equipment such as valves and pumps.
A blind flange has the functions of blocking the end of a pipe and facilitating the removal of debris from the pipe. Similar to the head and pipe cap, a blind flange can also serve as an isolation and cut-off function, but it has good sealing performance and is suitable for systems that require complete isolation.
The structure of a blind flange includes a round or square metal sheet, one side of which has a flange surface with an outer diameter and inner diameter matching the corresponding pipe size and with several bolt holes; the other side is a smooth sealing surface.
When installed on the pipe, it is fixed to the adjacent flange by bolts and nuts to form a completely closed break.
Blind Flanges Product Image Gallery
Here are various Blind 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 Blind Flanges
- Blind Flanges are 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 Blind 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.
Check Our Certificates
specifications & characteristics of Blind Flanges
This table provides a comprehensive overview of Blind 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 |
|---|---|
| Pressure Ratings | class150, class300, class600, class900, class1500, class2500 |
| Size Range | 1/2″-60″ |
| Materials | carbon steel, stainless steel, alloy steel |
| Facing Types | Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ), and Male and Female (M&F) |
| Bolt Hole Quantity and Diameter | The number and diameter of bolt holes vary with flange size and pressure rating |
| Connection Method | Blind flanges can be connected by bolting, welding, flanging, quick clamping, or quick swivel connection. |
| Standards and Codes | ASME/ANSI B16.5，ASME/ANSI16.47 |
| Seal Types | O-rings are usually used for sealing, as well as flat seals, seals with flanges and grooves that fit into each other, seals with packing or sealant between threads, and seals by welding. |
| Accessories and Attachments | Common fittings and accessories are seals, sealing gaskets, bolts and nuts. |
| Inspection and Testing | Common fittings and accessories are seals, sealing gaskets, bolts, and nuts. |
| Marking | It mainly includes size inspection, appearance inspection, material inspection, sealing performance test, pressure resistance test, connection strength test, wear and tear test, and so on. |
| Certification | Common certifications include ISO, ASME, API, etc. Certification indicates that the flange meets the requirements of standard specifications. |