Flange is a commonly used component for connecting pipes. Its function is to connect two pipes or the interface between pipes and equipment. When installing, you need to pay attention to some issues to ensure the quality and safety of the installation. This article will introduce the issues that should be paid attention to when installing flanges from the following aspects.

Selection of flange

Before installation, it is necessary to select a suitable flange according to the working conditions, medium, pressure, and other parameters of the pipeline. In general, the following conditions should be met:

1. The material should be the same or similar to that of the pipe to ensure the stability and tightness of the connection.

2. The size should be the same as that of the pipe to ensure the tightness and stability of the connection.

3. The pressure rating should be the same or higher than that of the pipeline to ensure the safety and reliability of the connection.

Preparations for installing the flange

Before installing the flange, some preparatory work is required to ensure the smooth progress of the installation. Specifically, the following aspects of work need to be done:

1. Clean the joints of the flanges and pipes to ensure that the connections are clean and free of impurities.

2. Check whether the connection between the flange and the pipe is smooth, and if there is any unevenness, it needs to be repaired.

3. Check the connection between the flange and the pipe for cracks or damage, and replace it if necessary.

4. Check whether the connection between the flange and the pipe is corroded or rusted, and deal with it if necessary.

Flange installation steps

When installing, you need to follow the steps below:

1. Align the connection between the flange and the pipe to ensure that the connection between the flange and the pipe is parallel.

2. Install the bolts and gaskets of the flange to the flange, and tighten the bolts by hand.

3. Use a wrench or torque wrench to tighten the bolts one by one, be careful not to overtighten or over-loosen.

4. Before tightening the bolts, it needs to be done in a cross sequence to ensure that the flanges are connected evenly.

5. After tightening the bolts, it is necessary to check whether the flange connection is tight, and if it is loose, it needs to be tightened again.

Flange tightness check

After installation, a tightness check is required to ensure that the flange connection is tight. Specifically, the following aspects of work need to be done:

1. Use a pressure gauge to check whether the pressure of the pipeline is normal, and check if there is any abnormality.

2. Use a leak detector to check whether there is any leakage in the connection of the flange, and deal with it if necessary.

3. Use the hand touch method to check whether there is any leakage in the connection of the flange, and deal with it if necessary.

In short, when installing flanges, you need to pay attention to issues such as type selection, preparation work, installation steps, and tightness inspection. Only by doing these things well can we ensure a stable, safe, and reliable connection.

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