METHOD FOR MEASURING THICKNESS OF BOILER WATER TUBE

摘要

An inspection hole (17) is formed on a side surface of a boiler water tube (10a) in a longitudinal direction, a base side of a guide pipe (16) is connected to the inspection hole (17), and usually, a closing member (24) is attached to the guide pipe (16). In a case where the thickness of the boiler water tube (10a) is measured, the closing member (24) is released from the guide pipe (16), an ultrasonic probe (18) is inserted into the boiler water tube (10a) from a tip side of the guide pipe (16), and the ultrasonic probe (18) is moved in the boiler water tube (10a).