Abstract: The application of phased array ultrasonic testing in power plant projects are more popular and acceptable by the owner, and therefore how to use it in boiler power stations according to relevant ASME standards and internal quality control manual of the company has become particularly important. If it is an ASME boiler stamp project, AI (Authorized inspector) will supervise and accept all process documents. According to the previous experience of phased array ultrasonic testing demonstration in the ASME stamp project, the preparation of demonstration block and demonstration of rules are introduced.