There are many reasons for flange leakage, which may be loose flange, inappropriate flange material, poor processing, etc. Therefore, when taking countermeasures, you need to find the cause of the leakage first.
Common causes of flange leakage
1. Damage to the flange sealing surface:
Damage to the flange sealing surface will lead to a decrease in sealing
performance, which will cause leakage.
2. Insufficient locking force: When the
flange tightening force is insufficient, the flange sealing surface cannot fit
tightly with the gasket, resulting in leakage.
3. Inappropriate material: Inappropriate
material of the flange gasket or expired service life may also cause leakage.
4. Improper installation: Improper
installation of the flange connection surface, such as non-parallel or
non-vertical connection surfaces, will cause leakage.
Treatment method
1. Replace the sealing element: Check
whether the gasket is damaged or severely aged. If the gasket is hardened,
aged, deformed or scratched, it should be replaced immediately.
2. Improve the installation process: Before
installing the flange, ensure that the connection surface is flat and vertical,
and clean the connection surface and apply appropriate lubricant.
3. Strengthen the tightening force: Set
different tightening methods according to different flange requirements to
ensure that the sealing surface of the flange is fully sealed during the
connection process.
4. Use C-ring and bimetallic flange: C-ring
and bimetallic flange are more common flanges on the market and have less
leakage.
(1) C-ring flange processing method:
a. Check whether the material of the C-ring
is suitable.
b. Adjust the tightening force to ensure
that the C-ring expands slightly.
c. Adjust the flatness of the flange
mounting surface.
(2) Bimetallic flange processing method:
a. Check whether the material of the
bimetallic flange is suitable.
b. Adjust the flatness of the flange
mounting surface.
c. Ensure that the curvature of the
bimetallic strip is correct.
Tips for preventing flange leakage
1. Reasonably select the material of the
flange sealing element.
2. Regularly check the status of the flange
connection surface and replace the damaged part in time.
3. Strengthen the flange tightening force
and master the skills to ensure that the sealing surface is fully fitted and
tightly sealed.
4. Always keep the flange connection
surface clean to avoid dust and oil from affecting the sealing.
5. Use C-ring and bimetallic flanges.
Summary
In short, in order to avoid the loss of
production and equipment caused by flange leakage, we should strengthen the
daily maintenance of flanges, update materials in time, and improve flange
materials and processing accuracy. If there is still a leakage problem, you can
consider using more reliable and better-sealed flanges and choose high-quality flange manufacturer to ensure the safe and stable operation of industrial equipment.