ops@aqs.com.sg +65 6262 4110


Visual inspection, with or without optical aids, is the original method of NDT. Many defects are surface-breaking and can be detected by careful direct visual inspection. Optical aids include low-power magnifiers, microscopes, telescopes and also specialised devices such as boroscopes, endoscopes and other fibre-optic devices for the inspection of restricted access areas. These devices can also be used with television camera systems. Much of the success of visual inspection depends on the surface condition and the lighting arrangements.


  • Internal Pipe Weld Root Inspection
  • Blockage, cleanliness and condition inspection
  • Pressure vessel internal inspection