Take you to understand the anti-corrosion problems of flanges
The direct external cause of corrosion of flanges and bolts is the presence of corrosive media between the flange gaps. Without the protection of anti-corrosion coatings, the flange metal surface and bolts will soon be in direct contact with water and air. Rusty. A measure of wrapping adhesive tape or plastic pipe around the joint of the two flanges has been taken to try to prevent external moisture and debris from entering the flange gap. This method can prevent debris from entering the flange gap to a certain extent, but It has little effect on anti-corrosion of flange parts, and three problems are found after use:
1. Because it cannot be completely sealed, in a humid environment, there will still be condensation in the flange gap due to the temperature difference. If it cannot be eliminated in time, it will accelerate the corrosion.
2. After a pair of flange gaps are closed from the outside, once the flange gasket leaks, it is easy to produce natural gas accumulation, which is not conducive to safe production.
3. After using for a period of time, the adhesive tape and plastic tube need to be replaced regularly due to the aging of the material.
Therefore, the use of adhesive tape or plastic pipe to seal the flange gap from the outside for anti-corrosion treatment, the actual effect is not ideal, it is necessary to find a new pipeline flange anti-corrosion treatment technology and method.