Extreme external influences require that the expansion joints be protected by special measures. Appropriate protective covers have been developed to this end: Ground Protective Shield, UV Protective Shield or Cover, Fire and Splash Protective Cover.
These types of shields/covers, when manufactured from metal, have one end which is bolted to or clamped to the mating pipe flange. The other end is free, designed to handle the movements of the expansion joint.
Caution: Fabric covers have some insulating properties. It is not recommended to insulate over elastomeric expansion joints. Because temperature containment can accelerate the aging of the rubber and makes required inspections difficult.

