Patent
Method for determining deposit buildup
TLDR
In this paper, a method of determining low density deposits on the inner surface of a boiler tube comprises the generation of ultrasonic energy which is directed from the outer surface of the tube to the inner surfaces.Abstract:
A method of determining low density deposits on the inner surface of a boiler tube comprises the generation of ultrasonic energy which is directed from the outer surface of the tube to the inner surface of the tube. The energy is reflected back and forth between the inner and outer surfaces with each reflection of the inner surface loosing energy by attenuation into any existing low density deposit. The first and fourth reflections are measured and digitized for analysis to determine the amount of attenuation. The amount of attenuation is representative of the low density deposit on the inner surface of the tube. The tube is preferably empty of water to avoid transmission of ultrasonic energy through water in the tube.read more
Citations
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TL;DR: In this article, a method for monitoring and measuring the buildup of deposits on the inner surface of a pipeline containing flowing fluid was proposed. But this method was not suitable for the case of large-scale flows, and it was not feasible to use the Doppler frequency shift of the received echoes to determine how far from the pipeline inner surface the interface between the deposits and the flowing fluid lies.
References
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Patent
High frequency ultrasonic technique for measuring oxide scale on the inner surface of boiler tubes
TL;DR: In this paper, a method for ultrasonically detecting and measuring oxide scale on the inner cylindrical surface of a fluid containing boiler tube, in situ, within a boiler, is disclosed.
Patent
Method for ultrasonic detection of hydrogen damage in boiler tubes
TL;DR: In this article, angle-beam ultrasonic shear-waves are used to detect the presence of hydrogen damage in boiler tubes, which are introduced via a pitch-catch technique in the axial and circumferential directions of a boiler tube.