Connections of Flanges

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Flange connection mode:

1. The flange connection should be maintained on the same axis, the center deviation of the bolt hole should not exceed 5% of the aperture, and the bolt should be freely perforated. The connection bolts of the flange should have the same specifications, the installation direction should be the same, and the bolts should be tightened symmetrically and evenly.

2. Oblique washers of different thicknesses should not be used to make up for the non-parallelism of the flange. Do not use double washers. When the large diameter washer needs to be spliced, it should not be connected with the flat port, but should be in the form of a diagonal lap or maze.

3. In order to facilitate the installation and disassembly of the flange, the fastening bolts and flange face shall not be less than 200mm.

4. When tightening the bolt, it should be symmetrical and intersecting to ensure the uniform force of the washer.

5. Bolts and nuts should be coated with molybdenum disulfide, graphite oil or graphite powder for subsequent removal: stainless steel, alloy steel bolts and nuts; The design temperature of the pipeline is below 100℃ or 0℃; Open-air facilities; Atmospheric corrosive or corrosive media.

6. Metal washers such as copper, aluminum and mild steel should be annealed before installation.

7. Do not directly bury the flange connection. The flange connection of the buried pipeline shall be an inspection well. If it must be buried, anti-corrosion measures should be taken.

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Requirements for selecting a threaded flange supplier

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Requirements for selecting a threaded flange supplier