Industrial equipment sealant media resistance selection matrix
Industrial equipment sealant media resistance selection matrix
Golden rule of chemical resistance:
Fuel/lubricant resistance: Fluorosilicone (volume expansion rate <3%)
Strong acid resistance (pH <2): Epoxy modified silicone (72 hours without swelling)
High temperature steam resistance: Silicone ceramic glue (continuous 350℃/peak 600℃)
Failure analysis of pipeline flange seal in a chemical plant: Ordinary silicone glue was used in contact with 98% concentrated sulfuric acid, and the glue powdered and fell off after 24 hours. After switching to polytetrafluoroethylene-filled silicone glue, the annual maintenance cost was reduced by 1.2 million yuan.
