Pressures – Fabric Expansion Joint
The effectiveness of an Isolmat bolster bag is also detectable in the case of operations under positive pressure.
Its presence, in fact, it supports the multilayer fabric expansion joint thus preventing (when supporting metal structures are not present in the stratification) the possible separation of the layers caused by large movements and positive pressures.
Reduction of thermal stress
Provided that BBV Tech’s multilayer fabric expansion joints are always designed to resist the operational temperature regardless of the presence of the internal Isolmat bolster bag, the installation of an internal bolster bag, if attached, has the induced advantage of a lesser thermal stress of the expansion joint, which further prolong its lifetime.
In applications where the “dew point” occurs at low temperatures, the opportunity to install an internal Isolmat bolster bag protection must be evaluated in each individual case.