Abstract:
A tandem radiography vehicle for use in pipelines includes a carriage assembly, having an internal combustion engine and a dynamo-alternator motor for driving the vehicle, and powering an X-ray tube. Electronic circuitry for controlling the operation and power to the X-ray tube are included. A compass control system on the carriage is activated by a magnet externally positioned on the pipeline for positioning the vehicle at a weld inspection area. Means for segregating exhaust from the engine are also disclosed.