This is a specific control for flaw detection in critical areas of the coupling tube-tube plate, both realized by welding (fillet weld or IBW) and expanding.

In the first case defects such as lack of fusion, inadequate penetration, solid or gas inclusions are searched.

In the second case defects such as over expanding, etching, notch, blowing are searched.

The inspection is carried out from plate side by mean of a borosonic scanner, while B_SCAN and C_SCAN are recorded for Reporting.

Inspection can be carried out both during construction and on-site.