Apparatus for inspecting a pipeline

An apparatus for inspecting a pipeline having a pig body which measures an inner shape and a wall thickness of a pipe body, traveling inside the pipe body, comprising:

• at least one distance measuring device for measuring a traveling distance of the pig body;
• a rotation angle gauge for measuring a rotation angle of the pig body around its center axis;
• a plurality of transducers for transmitting and receiving ultrasonic beams being arranged in the circumferential direction of the pig body and being confronted with an inner surface of the pipe body, for measuring the inner shape and the wall thickness of the pipe body;
• a recorder associated with the pig body which stores measured data, said recorder having means for cooling which comprises thermo-electric elements;
• signal processing device for processing signals from the distance measuring device, the rotation angle gauge and the transducers;
• and
• a data processing device for analyzing the measured data stored in said recorder after the pig body has been taken out of the pipe body.

An apparatus for inspecting a pipeline having a pig body which measures an inner shape and a wall thickness of a pipe body, traveling inside the pipe body, comprising:

• at least two distance measuring devices for measuring a traveling distance of the pig body, including at least a rotary distance measuring device and an eddy current distance measuring device;
• a rotation angle gauge for measuring a rotation angle of the pig body around its center axis;
• a plurality of transducer for transmitting and receiving ultrasonic beams being arranged in the circumferential direction of the pig body and being confronted with an inner surface of the pipe body, for measuring the inner shape and the wall thickness of the pipe body;
• a recorder associated with the pig body which stores measured data;
• a signal processing device for processing signals from the distance measuring devices, the rotation angle gauge and the
• a data processing device for analyzing the measured data stored in said recorder after the pig body has been taken out of the pipe body.