Pipe Flange Size Type And Selection

Flanges are an important part of connecting pipelines and equipment, and flanges of different specifications have different sizes. Choosing the wrong flange size will lead to problems such as loose pipe connections, leakage or damage. Therefore, several factors need to be considered when selecting a pipe flange to ensure that the appropriate flange size is selected.

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Pipe flange size types:

Generally speaking, the size classification of flanges is divided according to the diameter of the connection port and the thickness of the flange. The larger the size, the greater the thickness of the flange and the diameter of the connection port.

Dimensional classification of pipe flanges:

Flanges are divided into small size flanges, standard size flanges, large diameter flanges and extra large flanges according to different sizes. The size classification of flanges is mainly divided according to the diameter of the connection port and the thickness of the flange.

1. Small size flange: generally used for some low-pressure or general working conditions pipelines. The diameter of the connection port is usually less than 40mm, and the thickness of the flange is also relatively thin.

2. Standard size flange: usually used for some medium-high temperature and medium-high pressure pipes. The diameter of the connection port is usually between 40mm and 400mm. The flange thickness is moderate and thicker than small-size flanges.

3. Large-diameter flange: Mainly used for high-pressure and high-temperature pipelines. The diameter of the connection port is usually 400mm to 1000mm, and the thickness of the flange is also relatively large.

4. Extra large flange: usually used for special pipe and equipment connections. The diameter of the connection port exceeds 1000mm and the flange thickness is very large.

How to choose the appropriate pipe flange size?

1. Select according to pipe diameter

The size of the flange should be the same as the diameter of the pipe to ensure that the connection between the flange and the pipe is tight and no leakage occurs. For example, a 1-inch pipe requires a 1-inch flange, not other flanges. Only in special circumstances are flanges of different specifications required.

2. Select according to fluid

Different fluids have different pressure, viscosity, density and other characteristics, so flanges of different specifications need to be selected to adapt to different fluids. The size of the flange should be selected according to an empirical formula, which includes multiple factors such as pipe size, fluid flow rate, working pressure and medium density. If the medium temperature and pressure are high, standard size flange or large diameter flange should be selected.

3. Choose according to work pressure

The size of the flange must match the maximum rated working pressure of the equipment or pipe to which it is connected. If you choose a flange that is too small, it will not be able to withstand the rated working pressure, leading to serious consequences such as pipeline leakage or damage.

4. Select according to device type

Select the appropriate size and type of flange according to the special requirements of the equipment, such as mechanical connection, hydraulic pressure, etc.

5. Select according to the installation environment

When selecting flanges, you also need to consider the installation environment. Some environments may limit the size of flanges or valves, so these environments should be taken into consideration when selecting.

Conclusion:

It is very important to choose the appropriate flange size. Improper selection will affect the safety performance of the pipeline. In practical applications, appropriate flange sizes and types should be selected according to specific conditions to meet design requirements and safety standards and ensure stable and reliable operation of the project.