Ferrule-Type Flange Joint

Introduction to Ferrule-type Flange Fittings
Ferrule-type flange joint is a kind of connection component commonly used in the pipeline system. It is widely used in the connection of various fluid and gas pipelines due to its simple structure, convenient installation and good sealing performance. Unlike traditional welded, threaded, or clamped fittings, ferrule-type flange fittings enable pipe connections through the mechanical compression of the snap ring, providing extremely high leak-tightness and stability, and are suitable for applications with high pressure and complex fluid properties.
1、 Basic structure of ferrule-type flange joint
Ferrule-type flange fittings usually consist of the following parts:
Flange body: The flange body is the main structural part of the joint, which is usually made of high-quality carbon steel, stainless steel or alloy steel, with strong mechanical strength and corrosion resistance. Flange bodies typically have standardized connection holes for tight connection to other piping or equipment.
Ferrule: ferrule is an annular metal component, which mechanically compresses the sealing surfaces at both ends of the pipe to achieve a sealed connection. Ferrules are typically designed to take into account different pipe sizes and pressure requirements to ensure a reliable seal under high pressure or vibration.
Sealing gasket: The sealing gasket is usually located at the part where the ferrule contacts with the flange to prevent medium leakage. Gasket materials are generally selected according to different media and operating temperatures. Common materials include rubber, graphite, metal, etc.
Bolts and Nuts: Ferrule-type flanged joints are to be tightened with bolts and nuts to ensure that the parts are securely joined. These bolts and nuts are typically made of high strength alloy steel with high tensile strength and corrosion resistance.
2、 Working principle of ferrule-type flange joint
The working principle of the ferrule-type flange joint is to apply pressure evenly through the ferrule-type ring during the bolt tightening process, firmly connect the pipes at both ends of the joint, and achieve the sealing effect through the sealing gasket. The specific process is as follows:
When the pipes at both ends of the flanged joint are mated, the ferrules and gaskets are placed in the connected position.
Bolt both sides of the flange so that the ferrule ring compresses and surrounds the pipe.
By compressing the pipe, the ferrule makes the sealing gasket squeezed to a certain extent, forming a strong sealing effect.
This kind of compaction can not only prevent medium leakage, but also adapt to high temperature, high pressure, vibration and other harsh working environment.
3、 Features of Ferrule-type Flange Fittings
Easy installation: The ferrule-type flange joint is usually connected with bolts, and the installation process does not require welding or complex tools, so it has a high installation efficiency and is suitable for fast on-site installation.
High tightness: Efficient sealing can be realized through the mechanical compression of ferrule to avoid medium leakage, especially applicable to the pipeline system of high pressure or corrosive medium.
Removable repeatedly: different from welded flange, ferrule-type flange joint can be dismantled, inspected and maintained when necessary to facilitate overhaul and replacement of pipeline.
Strong adaptability: The ferrule-type flange joint is applicable to a variety of pipe materials, such as stainless steel, carbon steel, copper pipes, etc. It can be selected according to different media and pressure requirements.
High pressure resistance: Ferrule-type flange joint can bear high working pressure and temperature, especially suitable for high pressure pipeline system of petroleum, chemical industry and electric power industry.
High reliability: Since the structural design of ferrule-type flange joint focuses on the tightness and tightness, it can effectively prevent looseness and leakage during long-term use, and ensure the safety and stability of the pipeline system.
4、 Applications of Ferrule-type Flange Fittings
Ferrule-type flange joint is widely used in many fields due to its superior performance. It mainly includes:
Petroleum and natural gas industry: petroleum and natural gas pipelines need to withstand high pressure and harsh working environment. Ferrule-type flange joints can provide reliable connection, prevent leakage and improve system safety.
Chemical industry: chemical media have corrosive and high temperature characteristics. Ferrule-type flange joints can effectively avoid media leakage and provide long-term sealing effect, which are applicable to chemical equipment and pipeline connection.
Power industry: cooling water pipeline, steam pipeline and other systems in the power plant need to bear high pressure. Ferrule-type flange joint can provide stable connection and avoid system failure.
Metallurgical industry: High-temperature and high-pressure pipelines in metallurgical production require solid connecting parts. Ferrule-type flange joints can provide long-term stable performance in severe environment.
Food and pharmaceutical industry: the pipeline system of the food and pharmaceutical industry needs to strictly control the sealing and sanitary conditions of the medium, and the ferrule-type flange joint can provide a high standard of sealing to prevent pollution and leakage.
5、 Maintenance of Ferrule-type Flange Joint
Although ferrule-type flange fittings are durable, they require periodic maintenance and inspection during use to ensure long-term stable operation. Main maintenance measures include:
Regularly check the bolt tightening: ensure that the bolts and nuts are not loosened to avoid joint leakage.
Check the wear of the sealing gasket: if the gasket is aged or damaged, it shall be replaced in time to ensure the sealing effect.
Clean the surface of ferrule and flange joint: regularly clean the dirt and rust on the joint surface to avoid affecting the sealing performance.
Check whether the ferrule is deformed: the ferrule may be deformed after long-time use. Check regularly to ensure that it can work properly.
6、 Conclusion:
Ferrule-type flange joint has become an important part in pipeline connection due to its advantages such as simple installation, strong sealing and repetitive disassembly. With the continuous progress of industrialization, the ferrule-type flange joint will play a more important role in petrochemical, electric power metallurgy, food and pharmaceutical and other fields.