The temperature resistance of expansion joints varies depending on the type of material they are made of. The maximum working temperature of rubber expansion joints depends on the type of rubber they are made of and reaches +150C. PTFE (Teflon) expansion joints have a higher allowable working temperature, which depending on the operating pressure, can be slightly above +200C. On the other hand, steel expansion joints can operate at much higher temperatures, which depending on the material used, far exceed +500C. Fabric expansion joints offer the highest temperature resistance. Since they are made of specially engineered materials, they can operate faultlessly at working temperatures up to and even above +1000C.