MOIRE METHOD FOR MEASURING CREEP OF MAIN STEAM PIPE AT HIGH TEMPERAIURE

In this paper,The long-term creep of main steam pipe at high teniperatureis measured with moire method.The principle of measurement and explanation on moirefringes of cylindrial surface are discussed.The creep meaJsurement accuracy is improvedby elimination of the off-plane deflection.The good results verify that it is an applicablemethod