On-line Health Monitoring Research on T-Joint of Main Steam Piping

摘要

The main challenge of long-time creep monitoring on site is a reliable sensor.In this paper,a sensing device is developed specifically for high temperature creep monitoring.And it is applied to on-line monitor the strain of material on T-joint of main steam piping.Its reliability is verified theoretically using the finite element method and experimentally by high temperature on site test.The creep damage of the T joint is evaluated basing on the creep rate sensed by the sensing device.Andthe residual life is predicted for the piping system using the Monkman-Grant equation.This system is useful for safety assessment procedures in thermal power plant,nuclear power plant and petrochemical industries.