What Situations Might Occur With Pre-insulated Bushings At High Temperatures?

When pre insulated sleeve is exposed to high temperatures, several adverse changes may occur. Thermal expansion leading to dimensional changes is common; typically, the sleeve expands slightly during the initial heating phase, followed by thermal contraction.

If the temperature exceeds the design temperature range of pre insulated junction sleeve, structural performance may deteriorate. The cross-linked thermoplastic polymers of the material may experience reduced mechanical elasticity and tensile strength under overheating conditions.

High temperatures can also cause visible changes in appearance. Overheating often manifests as discoloration, deformation, cracking, or delamination of insulated joint sleeve. This indicates that the originally uniform and intact insulating protective layer may be damaged.