Thermal imaging dataset from buried ductile iron pipe inspected by in-pipe thermography under convective heatinghttps://doi.org/10.60933/PRDR/NBJJEMYU, SamuelHO, Marco Kin PanLAI, Wallace Wai-lokSHAM, Janet Fung ChuHO, Chun YiuPolyU Research Data Repository2025-05-172025-05-23T12:40:29Z<p style='margin-top:0cm;margin-right:0cm;margin-bottom:8.0pt;margin-left:0cm;font-size:11.0pt;font-family:"Aptos",sans-serif;'><span style='font-size:16px;font-family:"Times New Roman",serif;'>This dataset presents a thermal imaging dataset from a buried ductile iron pipe that were in-pipe inspected by infrared thermography with convective heating by hot air to validate whether convective heating is a reliable way in detecting and characterising external corrosion of metallic underground utilities (manually milled flat bottom holes on the outer pipe wall representing corroded regions). A heat blower was set to 50 °C, and the hot air was blown into the pipe with a 400 mm diameter at a velocity of 0.8 m/s for approximately 140 seconds. The pipe is 1.5 m long with a wall thickness of 8 mm, with an initial temperature of 22.3 °C. 36 flat-bottom holes were milled on the outer pipe wall, spread in 6 circumferential rings and angular direction. Three types of milled shapes with three different lateral sizes of 75 mm, 50 mm, and 25 mm were designed with varying residual thickness ranging from 1.7 mm to 4.4 mm. A Tau2 infrared camera in tunnel-view (facing frontward) is used to record the thermal images at an 8.7 frames per second sampling rate. Finally, the dataset proposed consists of 1 sequence of 4446 images of 640 x 512 pixels.</span></p>EngineeringFlat Bottomed HoleConvective HeatingIn-pipe InspectionEnglish2022-01-20YU, SamuelYU, SamuelHO, Chun YiuLAI, Wallace Wai-lokSHAM, Janet Fung ChuSHAM, Janet Fung ChuHO, Chun Yiu2025-05-08Survey DataCC BY-NC 4.0