G - Physics – 01 – N
Patent
G - Physics
01
N
358/5.1
G01N 23/04 (2006.01) G01M 3/38 (2006.01) G01N 23/00 (2006.01)
Patent
CA 1206278
ABSTRACT OF THE DISCLOSURE A device for radiographically inspecting the girth weld seam on a double jointed pipe including a cart on which the pipe is mounted, for transporting the pipe longitudinal- ly to a location where it surrounds a radiation source mounted on one end of a cantilevered boom. A radiation de- tection unit that produces a visible image of radiation penetrating through the pipe is disposed on the outside of the pipe in alignment with the radiation source. When the girth weld on the pipe is brought into registry with the radiation source by the cart, rollers on the cart are actua- ted to rotate the pipe about its longitudinal axis, thereby enabling the entire periphery of the girth weld to be in- spected. The video image of the girth weld can be observed on a video monitor, and recorded by means of a video cas- sette recorder and a facsimile unit. In addition to the girth weld image, appropriate instructions relating to re- pairs to be performed on the pipe can be included in the recordings. A spray marker located adjacent the radiation detection unit enables an operator to precisely mark the location of detected flaws on the pipe, to facilitate subse- quent repairs in accordance with the instructions on the recorded medium.
410120
Kaiser Steel Corporation
Osler Hoskin & Harcourt Llp
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