Non-destructive testing of pipes
First Claim
1. A method for the non-destructive condition assessment of a pipe carrying a fluid, comprising:
- detecting an acoustic disturbance propagating past two longitudinally separated points on said pipe;
determining an actual value representative of the propagation velocity of said acoustic disturbance;
computing a corresponding predicted value for the propagation velocity as a function of at least one wall thickness parameter of said pipe by using a theoretical model for the propagation of acoustic waves in said pipe that assumes said pipe has a finite wall thickness with a predetermined circumferential thickness profile; and
computing said wall thickness parameter by matching said actual value with said predicted value.
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Accused Products
Abstract
To perform a non-destructive condition assessment of a pipe carrying a fluid, an actual value representative of the propagation velocity of an acoustic disturbance propagating between two longitudinally separated points on the pipe is determined. A corresponding predicted value for the propagation velocity is computed as a function of at least one wall thickness parameter of the pipe by using a theoretical model for the propagation of acoustic waves in the pipe that assumes said pipe has a finite wall thickness with a predetermined circumferential thickness profile. The wall thickness parameter is then computed by matching the actual value with the predicted value, for example, by substituting the actual value in a formula predicting the theoretical value.
56 Citations
19 Claims
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1. A method for the non-destructive condition assessment of a pipe carrying a fluid, comprising:
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detecting an acoustic disturbance propagating past two longitudinally separated points on said pipe; determining an actual value representative of the propagation velocity of said acoustic disturbance; computing a corresponding predicted value for the propagation velocity as a function of at least one wall thickness parameter of said pipe by using a theoretical model for the propagation of acoustic waves in said pipe that assumes said pipe has a finite wall thickness with a predetermined circumferential thickness profile; and computing said wall thickness parameter by matching said actual value with said predicted value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification