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Remote Visual Testing — Borescope (RVI)

Internal visual inspection of confined, restricted-access, and inaccessible spaces using rigid borescopes, flexible videoscopes, and articulating probe systems — delivering direct visual evidence of internal condition without component disassembly.

What Is Remote Visual Inspection?


Remote Visual Inspection (RVI) — or Remote Visual Testing (RVT) — encompasses a range of optical and video-based inspection techniques that enable a qualified inspector to examine the internal surfaces of components, structures, or equipment that are inaccessible or impractical to inspect by direct visual means. The inspector views the inspection area via an eyepiece, a display screen, or a recorded video feed — directing the optical device through the available access point to the inspection location.

RVI Equipment We Deploy:

Rigid Borescopes Straight, rigid optical instruments available in a range of diameters and lengths — for inspection through small, straight access ports in machinery, pressure equipment, and confined pipework sections. Excellent image quality and lighting; limited to straight-line access paths.

Flexible Videoscopes (Video Borescopes) Articulating flexible probes with integrated camera head and LED lighting — providing steerable access through bends, around corners, and into complex internal geometries. Inspection image displayed on a portable screen and recordable as video or still images. The most versatile and widely used RVI tool for industrial inspection.

Articulating / Pan-and-Tilt Probe Systems Advanced articulating camera systems for larger diameter access openings — vessel internals, tank floors, duct systems, and storage cavities. Camera head controllable in multiple axes for full coverage of the inspection space.

 Where We Apply RVI


  • Gas turbine and steam turbine blade and vane inspection during maintenance
  • Heat exchanger internal tube and shell inspection 
  • Pressure vessel internal surface condition assessment and coating inspection 
  • Pipeline and piping internal inspection from end openings or access tees 
  • Engine and compressor internal inspection without disassembly 
  • Aviation engine borescope inspection (pre-maintenance and post-maintenance) 
  • Storage vessel and silo internal inspection for structural condition and contamination  

 Applicable Codes and Standards


  • ASME Section V — Article 9 (Visual Examination)
  • EN ISO 11056 — Remote visual inspection 
  • API 510 — Pressure Vessel Inspection Code — internal inspection requirements 
  • API 570 — Piping Inspection Code — internal inspection 
  • AWS D1.1 — Structural Welding Code — visual examination requirements 
  • OEM-specific borescope inspection requirements for turbine and engine maintenance