Abstract: A material life predicting method is to perform X-ray diffraction on a target to obtain a composition state curve diagram of the target, and then compare the composition state curve diagram of the target according to a built-in data in a database to obtain a composition of the target and content of the composition, and then the content of the identical composition of the target and the control is compared to obtain the change in the content of the identical composition between the target and the control, and then quantify a consumption degree of the material life of the target, where the control is a new furnace tube and the target is a used furnace tube.

Abstract: A method for measuring steam pressure is provided, in which a steam pressure graph plotted according to temperature and strain is provided, so that the user can look up the steam pressure graph to know the steam pressure value inside a target object and determine whether there is a steam leakage in the target object.