Mặt bích ren là một loại mặt bích ống quan trọng được sử dụng trong các ngành công nghiệp khác nhau để kết nối đường ống, van, và các thiết bị khác mà không cần hàn. Their design allows for a secure, leak-resistant joint by using internal threads that match the external threads of the pipe. This makes them especially valuable in systems where welding is impractical or undesirable due to safety, vật liệu, or operational constraints.

Trong bài viết này, we will cover what threaded flanges are, lợi ích của họ, ứng dụng, nguyên vật liệu, xếp hạng áp lực, thực hành tốt nhất về cài đặt, and how they compare with other flange types.

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What is a Threaded Flange?

A threaded flange, also known as a screwed flange, is a type of flange with an internal thread. This thread matches the external thread of the connecting pipe, enabling the two components to be joined without welding.

Key characteristics:

• Available in sizes typically from NPS 1/2″ tới NPS 24″.

• Designed according to standards like ASME B16.5.

• Suitable for low-pressure and non-cyclic service conditions.

• Dễ dàng lắp ráp và tháo rời.

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Ưu điểm của mặt bích ren

1. Không cần hàn

• Ideal for applications where welding is risky, such as explosive environments.

• Prevents heat-related damage to pipe material.

2. Dễ dàng cài đặt

• Can be installed quickly with basic tools.

• No need for specialized welding equipment or personnel.

3. Khả năng tái sử dụng

• Can be removed and reused without damage, giảm chi phí thay thế.

4. Minimal Heat Distortion

• Since no welding is involved, there is no risk of heat-induced warping.

5. Tính linh hoạt

• Works well with galvanized, thau, or other materials sensitive to welding.

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Limitations of Threaded Flanges

While threaded flanges offer many benefits, they have limitations:

• Not ideal for high-pressure, nhiệt độ cao, or cyclic load applications.

• Threads may become worn or damaged over time.

• More prone to leakage compared to welded connections if not properly installed.

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Common Applications of Threaded Flanges

1. Small-Diameter Piping Systems

   • Ideal for pipe sizes typically less than NPS 2.

2. Hazardous Environments

   • Used where welding could create a fire or explosion risk.

3. Temporary Installations

   • Easily removable for system changes or maintenance.

4. Utility Piping

   • Often used in water, không khí, and non-hazardous fluid systems.

5. Hàng hải và ngoài khơi

   • Suitable for low-pressure seawater systems.

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Threaded Flange Design Features

• Bore with Internal Threads – Matches external threads of the pipe.

• Mặt nâng lên (RF) hoặc Mặt phẳng (FF) – Common facing options.

• Bolt Holes on Flange Rim – For secure connection to mating flanges.

• Standard Pressure Ratings – Commonly Class 150 và lớp 300.

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Materials for Threaded Flanges

Threaded flanges are available in a wide range of materials to meet specific application needs: