Nondestructive testing in fabrication integrates quality verification throughout manufacturing, from incoming material inspection through final equipment examination. Strategic NDT application prevents defects from progressing through fabrication, reducing rework and ensuring code-compliant equipment.

Fabrication NDT sequence typically includes incoming material verification using UT or RT to detect mill defects, in-process examination during fabrication identifying problems early, weld examination per code requirements, and final examination before pressure testing and shipment. Each examination point adds value by catching problems when correction is least expensive.

For pressure vessel fabrication, NDT planning considers code requirements, joint configurations, material thickness, and accessibility. Procedure qualification may require specific NDT methods. Progressive examination—root pass PT, fill and cap RT or UT—ensures complete weld quality assessment.

NDT equipment and technician qualifications significantly impact examination quality. Certified technicians using calibrated equipment following qualified procedures provide reliable results. Third-party inspection agencies verify NDT compliance for code work, particularly ASME stamped vessels.