A method for monitoring of screw connections, as well as screws or bolts for the monitoring of screw connections on flange connections.

摘要

A method for monitoring of screw connections, with the screw connection (2) comprises one or more screws, which, depending on the embodiment with one or two nuts (5, 6) are screwed,and wherein the screw connection (2) with a yield point of 70 – 80% of the elastic deformation is tightened,characterized by– the use of which is constructed as a measuring bolts, screw bolts (3), which are made on an exact length, and– the screw connection (2) with a yield point of 70 – 80% of the elastic deformation is tightened,– the head to a maximum change in length which, taking into consideration the material strength is calculated,– this change in length as a measure at the location of the screw connection (2) is monitored,– in order to thus a determination on the state of the screw connection (2) to obtain,– and wherein the length dimension of the screw bolt (3) on nominal dimension with a length tolerance of + / – 0.02 mm is made.