Rubber is generally used as the fabric layer of acid-resistant equipment in chemical enterprises. The most common corrosive damaged part of rubber lining equipment is the flange joint. Often due to poor sealing between flange surfaces, there is a small leakage, so that the carbon steel flange in the acid corrosion, showing a gap or uneven. The usual method of amendment is to replace the flange joint and to liner it with glue from scratch.