VISUAL INSPECTION (VT) SERVICE

Visual testing (VT) is the oldest and most common non-destructive testing (NDT) technique. It is often the first step in the examination process before starting other NDT methods. Compared to other techniques, visual testing is low-cost, easy to perform, and generally eliminates the need for other types of testing. Mechanical or optical aids may be required to perform visual testing. Before using any mechanical or optical aids, the sample must be well illuminated and its surface cleaned.

This method is used to inspect various product forms including castings, forgings and welding. Structural steel, automotive, petrochemical, power generation and aerospace industries are a few examples that use visual inspection.