Coreless flaw detection head

G - Physics – 01 – R

Patent

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324/50

G01R 33/12 (2006.01)

Patent

CA 1129960

ABSTRACT OF THE DISCLOSURE: A coreless flaw detection head adapted to detect a flaw or flaws which may be present on the inner surface of a non-magnetic metal pipe and variation in the wall thickness of the pipe which comprises a cylindrical main body having first annular grooves adjacent to one end and a second annular groove adjacent to the other end, differential system detection coils received in said first annular grooves, an absolute value system detection coil, a sheath surrounding a substantial portion of the length of said main body, a substantially hollow cylindrical cover member on said other end of the main body and protection rings on said one end of the main body and on the end of said cover member opposite to said main body.

317095

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