Parameter programs for 3D modeling in the function of nondestructive testing and determination of the lifetime of pressure vessels

Abstract

Preparation for non-destructive testing (NDT), preparation of test reports, as well as control calculation of a pressure vessel (PV) using the finite element method (FEM), with or without identified irregularities, requires the use of commercial programs for parametric modeling, which allow the rapid creation of three-dimensional (3D) model of the test object. 3D modeling programs enable the determination of one or more rappers in order to orient the test object, accurately define the established irregularity or error after NDT, as well as the most critical part of the PV construction after FEM calculation with the possibility of optimization. Programs for 3D modeling also enable modeling of determined irregularities after performed tests that occurred during the construction, calculation, production or exploitation of the PV construction itself. Irregularities are reflected in the form of improperly performed welded joints, cracks, corrosion, erosion or cavitation of materials, and are used for the preparation of test reports and control calculations of the PV structure with and/or without established irregularities and errors, with the aim of making the correct decision on the continuation of exploitation construction of PV or about its degree of rehabilitation