Monitoring of creep and tensioning of critical or thick walled components used at high temperatures and pressures by optical monitoring of surface markings so that changes in creep rate etc. are immediately detected

摘要

Method for measuring the creep of a component at high temperature and pressure has the following characteristics: markings are attached to the surface of the component being monitored or characteristic surface features determined; the markings or features are continuously optically monitored; variations caused by pressure and temperature, which are measured, are compensated; from the difference between measured and calculated separations component creep and creep speed can be monitored; creep can be calibrated at room temperature with zero differential pressure.