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A flange insulating gasket kit typically includes an insulating gasket, insulating bolt sleeves, insulating washers, and metal backing washers. These components work together to electrically isolate the flange faces and prevent galvanic corrosion while maintaining a sealed connection.

Flange insulation gaskets play a critical role in pipeline systems by preventing electrical contact between dissimilar metal flanges, which helps reduce galvanic corrosion. They also support cathodic protection effectiveness and improve the overall safety and longevity of pipeline infrastructure.

Fiberglass sleeving offers excellent heat resistance and mechanical durability, while silicone sleeving provides superior flexibility and moisture protection. This article compares their key performance characteristics, typical applications, and limitations to help you determine which sleeving is better suited for your specific requirements.