This document is intended for the application of AT on metallic pressure equipment during controlled loading. Therefore the overall aims of this document are: to detect, locate and grade areas with evolving imperfections; to provide the manufacturer the possibility to compare results of the first test with those of subsequent periodic inspections; to determine the possibilities and limits of AE testing (AT)for pressure equipment; to establish common basis for procedures to perform AT, taking into account the specific characteristics of the equipment under test; to define the criteria, features and grades essential for evaluation of test results; to suggest follow-ups to the test.