Non - destructive testing - acoustic emission - examination of metallic pressure equipment during proof testing - planar location of ae sources ; german version en 14584 : 2005 无损检验.声音排放.在验证试验过程中金属压力设备的
A Proof test is a form of stress test to demonstrate the fitness of a load-bearing structure. An individual proof test may apply only to the unit tested, or to its design in general for mass-produced items.