Abstract
Abstract Testing pressure vessels in the field is generally conducted within a given range of test pressures, determined beforehand according to specified criteria. Thus monitoring of flaw growth using AE is carried under restricted conditions. To study the AE activity of flaws in welded seams of a pressure vessel (made of low-alloy steel) at different stages of growth and at different strains, tests were conducted on both spherical and cylindrical pressure vessels containing different artificial flaws. For given test conditions, the relationships between AE activity of artificial flaws and measured strains were studied. These tests form an important basis for the testing and assessment of engineering pressure vessels in the field.
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