Flange connection is to fix two pipes, fittings or equipment on a flange separately, between the two flanges, plus flange pad, and fasten them together with bolts to complete the connection. Some pipe fittings and equipment have their own flange, also belong to the flange connection. Flange connection is an important connection mode in pipeline construction. Flange connection is easy to use and can withstand greater pressure. In industrial pipelines, in the family, the diameter of the pipeline is small, and it is low pressure, so the flange connection can not be seen. If you are in a boiler room or production site, there are flanged pipes and equipment everywhere.

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.