Abstract: The present disclosure relates to a device and method for pipeline inspection, The inspection device may include an exciter coil capable of providing an alternating current magnetic field and producing eddy currents. A plurality of sensors may then be provided which are capable of sensing a magnetic field produced by the eddy currents and the sensors may be engaged with a sensor shoe. The sensors may then be capable of being positioned at a first distance D1 with respect to an inner pipe wall surface and capable of providing coupling to the magnetic field produced by the eddy currents. The sensor shoe may also be capable of retracting to a second distance D2, wherein D1<D2. The sensor shoe may be connected to a sensor support arm wherein the support arm may be pivotably attached to a fixed hub and to a control arm which control arm may then be pivotably attached to a driven hub.

Abstract: The present disclosure relates to a variable diameter electromagnetic coil. The coil may include a coil winding containing inner and outer winding layers. The coil may incorporate a first hub including one or a plurality of inner supports, one of the inner supports connected to a location on the inner winding layer. A second hub may then be provided including one or a plurality of outer supports, one of the outer supports connected to a location on the outer winding layer. One of the first or second hubs may be capable of rotating to cause the coil winding to wind or unwind. An interconnect hub may then be provided which may be capable of providing electrical connection to the coil winding.

Abstract: A main body 19 of a nondestructive inspection apparatus is positioned on a spray line header 13 connected to a thermal sleeve 16 within a cooling water inlet nozzle 12, and fixed to a core spray line 14 by vertically clamping the core spray line 14 with fixing units 21a, 21b at the position where the thermal sleeve 16 to be inspected is located. Scanners 24a, 24b insert a tape probe 27 having an inspection head 28 inside an annular gap 17 formed between the thermal sleeve 16 and the cooling water inlet nozzle 12 in an axial direction. The scanners 24a, 24b are guided by guide rails 22a, 22b to move the tape prove 27 so that the inspection head 28 can move in the circumferential direction of the annular gap 17.