This Standard specifies requirements for thermally released links for general fire protection services in buildings. Thermally released links are commonly used in fire dampers, fire shutters, smoke and heat ventilators and fire doors. The Standard includes requirements for construction, testing, identification and marking of thermally released links, as well as special high temperature fatigue test procedures for uncoated and coated thermally released links, for use in high temperature industrial environments. This Standard does not apply to links incorporated in sprinkler heads.