A review on various types of in-pipe inspection robot

The In-pipe Inspections robot (IPIR) are robots that run inside of pipelines and carry out the inspection work there. The pipelines develop certain anomalies like corrosion, cracks, dents, misalignments, etc. during their work cycle that needs to be rectified. Using IPIR eases the process of inspection that is difficult with the manual procedure that includes visual and some external non-destructive testings (NDTs). There are various types of robots in these fields including wheel-driven, track-driven, Pipe inspection gauge (PIG), walking type, and inchworm type. This paper will provide the specifications and design specialties of each type of robot. Each robot is designed considering certain parameters like maneuverability, pipeline diameter, adaptability, design structure, and more, and hence these are specific. There are certain limitations to each design at the end. Finally, this paper will help to select a specific robot for a particular requirement based on the comparison.