Relaxation test rig
Creep/relaxation testing values are of interest wherever gasket creep results in impermissible relaxation of the connection. Here many parameters need to be taken into account, such as the stiffness of the connection, the initial surface pressure, the temperature, the speed of temperature change, the exposure time etc. In addition, the tests need to be carried out over a longer period of time.
For this reason – in addition to the TEMES fl.ai1 test rig – we have designed a more simple mechanical fixture especially for investigating creep/relaxation: TEMES fl.relax. This enables testing to be carried out more cost-effectively; if necessary, several test rigs can be employed at the same time.
Design and function
Essentially, the TEMES fl.relax test rig consists of two stiff plates which are connected firmly together via two columns. The actual test rig is located between them, where the force is applied vertically to the test piece via a punch. An electric heating element is integrated above and below the sealing strips.
An exchangeable stiffness member is assembled in the force flow between the test rig and the upper cross-beam. This component enables the simulation of different stiffnesses of real flanged connections in the fixture.
Furthermore, the deformation of this stiffness member is used to measure the applied gasket surface pressure and the subsequent relaxation of the gasket. This means only a digital indicator is needed to record the measurements, which can be read either manually, or whose signal can be sent to a PC via a data logging unit.
Used by us
The TEMES fl.relax test rig is also used in our test laboratory. We would be delighted to determine the characteristics of your gaskets for you here. You can find more information on gasket testing at AMTEC under the menu tab Test laboratory.