Gamma ray calibration system

Details Gamma ray calibration system Gamma ray calibration system

G - Physics

01

B

358/5.1

G01B 15/02 (2006.01)

Patent

CA 1098221

ABSTRACT A method and apparatus for calibrating a gamma ray inspection system for measuring the wall thickness of a tubular product such as a pipe or the like, the system including a gamma ray beam generating station, a drive system which conveys a tubular product axially past the gamma ray beam, the gamma ray generator being rotated during the axial movement of the tubular product, a detector for detecting the amount of attenuation of the gamma rays passing through the tubular product, and a calibration block having a first portion with a thickness corresponding to twice the nominal wall thickness of the tubular product to be inspected, and a second portion having a thickness corresponding to a predetermined amount less than the nominal wall thickness. The first portion and the second portion of the calibration block are selectively introduced into the gamma ray beam to enable the operator to calibrate the equipment and to be able to detect tubular products which are defective in terms of thickness.

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