Cleaning and gauging (HYRER/HYREL); Mapping (HYRER/HYREL); Internal and external metal-loss anomalies (HYRER/HYREL); Dents, ovalities and roof topping (HYRER/HYREL); Axial cracking and crack-like anomalies (HYRER/HYREL); Pipe material hardness variation (HYRER/HYREL); Pipe material type variation (HYRER/HYREL); Axial strain (HYRER/HYREL); Cleaning and gauging (HYRER Loop); Mapping (HYRER Loop); Internal and external metal-loss anomalies (HYRER Loop); Dents, ovalities and roof topping (HYRER Loop); Axial cracking and crack-like anomalies (HYRER Loop); Pipe material hardness variation (HYRER Loop); Pipe material type variation (HYRER Loop); Axial strain (HYRER Loop)