Ultrasonic thickness gage for pipe

Details Ultrasonic thickness gage for pipe Ultrasonic thickness gage for pipe

1991-09-26

1994-05-24

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73634, 73640, G01N 2910, G01N 2926

Patent

active

053138376

ABSTRACT:
The invention is a compact ultrasonic tester involving rotating sensors. The processor rotates with the sensors so that the output signal of the processor goes through the slip rings, rather than the output signal of the sensors. A spraying system is incorporated in conjunction with rollers. The rollers take the applied spray on the pipe surface and paint a film on the outer pipe surface to allow a good contact for meaningful results. A floating shoe is provided for holding each sensor against the pipe wall. The sensors are biased into contact with the pipe surface and the machine can handle different diameters of pipe. By controlling the pipe speed of advance and the rotational speed of the sensors, 100 percent coverage of the pipe wall is assured. The machine is compact and can be installed behind existing electromagnetic/gamma testers without major modifications to pipe-testing facilities.

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