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Pipe leakage has always been an inevitable problem because no matter what pipe it is, mechanical fatigue or corrosion will occur as it is constantly used, which will create a certain gap at the pipe interface, resulting in leakage. Leakage often causes huge losses to pipeline transportation, especially in large pipeline construction. Once a leak occurs, the transportation of important resources may stop. In order to solve the leakage problem, better flanges and flange gaskets are often used in pipeline construction at this stage. It is precisely because of this that the installation of flanges and flange gaskets is particularly important. So how do you choose and install flanges and flange gaskets? What should I pay attention to when installing? Let's take a look together!
1. Pattern
The texture represents the rough pattern of the flange surface, such as multi-direction, spiral, serrated, etc. Processed into concentric circles or spirals, and the surface roughness should be consistent with the center line of the gasket (such as a circular flange). Please do not install the gasket directly on the flange surface. Be sure to pay attention to the installation method and the type of gasket. Direct installation of flange gaskets can easily lead to pipe leakage.
2. Waveform degree
Waveform refers to the deviation from the overall flatness. Usually, wavefront issues need not be considered, but excessive waveforms are also difficult to solve, so special attention is sometimes required.
First is the glass lining equipment, in which the natural flow of molten glass forms great ripples. The glass lining flange is also prone to deformity under high bolt torque.
When encountering a flange that warps, if the warpage is caused by thermal deformation or internal stress, the flange can be reprocessed. When the bolt load is too large or the flange thickness is not enough, it is usually called "arch deformation". The solution is to use a more rigid flange, sometimes strengthening the structure by strengthening it.
3. Roughness
The roughness is calculated from the midpoint of the flange surface and is expressed in microns. The surface roughness of the serrated flange is usually 125 microns to 500 microns.
When the flange is too thick, ordinary gaskets usually cannot be sealed, so soft gaskets should be selected at this time. On the other hand, the grinding surfaces and other high-precision flange surfaces are also difficult to seal. The sealing surface requires sufficient friction to prevent the gasket from rupturing, crushing and excessive creeping.
The above are some relevant knowledge about flanges and flange gaskets. The correct selection and installation of flanges and flange gaskets can effectively prevent pipe leakage, so you must pay attention to this during pipeline construction.
1. Pattern
The texture represents the rough pattern of the flange surface, such as multi-direction, spiral, serrated, etc. Processed into concentric circles or spirals, and the surface roughness should be consistent with the center line of the gasket (such as a circular flange). Please do not install the gasket directly on the flange surface. Be sure to pay attention to the installation method and the type of gasket. Direct installation of flange gaskets can easily lead to pipe leakage.
2. Waveform degree
Waveform refers to the deviation from the overall flatness. Usually, wavefront issues need not be considered, but excessive waveforms are also difficult to solve, so special attention is sometimes required.
First is the glass lining equipment, in which the natural flow of molten glass forms great ripples. The glass lining flange is also prone to deformity under high bolt torque.
When encountering a flange that warps, if the warpage is caused by thermal deformation or internal stress, the flange can be reprocessed. When the bolt load is too large or the flange thickness is not enough, it is usually called "arch deformation". The solution is to use a more rigid flange, sometimes strengthening the structure by strengthening it.
3. Roughness
The roughness is calculated from the midpoint of the flange surface and is expressed in microns. The surface roughness of the serrated flange is usually 125 microns to 500 microns.
When the flange is too thick, ordinary gaskets usually cannot be sealed, so soft gaskets should be selected at this time. On the other hand, the grinding surfaces and other high-precision flange surfaces are also difficult to seal. The sealing surface requires sufficient friction to prevent the gasket from rupturing, crushing and excessive creeping.
The above are some relevant knowledge about flanges and flange gaskets. The correct selection and installation of flanges and flange gaskets can effectively prevent pipe leakage, so you must pay attention to this during pipeline construction.