首页>
外国专利>
ULTRASONIC LAMB WAVE TECHNIQUE FOR MEASUREMENT OF PIPE WALL THICKNESS AT PIPE SUPPORTS
ULTRASONIC LAMB WAVE TECHNIQUE FOR MEASUREMENT OF PIPE WALL THICKNESS AT PIPE SUPPORTS
展开▼
机译:超声波羔羊波技术,用于测量管道支撑处的管道壁厚
展开▼
页面导航
摘要
著录项
相似文献
摘要
This invention is a new inspection technique using ultrasonic Lamb waves to measure reduction of pipe wall thickness due to localized corrosion at pipe supports. The technique uses two transducers in a pitch-catch mode to send and receive a selected Lamb wave. The wave travels along the pipe wall in the circumferential direction. The reduction of the pipe wall thickness at the pipe support changes the time-of-flight between the two transducers. By comparing time-of-flight data measured from the pipe support area and from areas adjacent to the pipe support, one can quantify the change of time-of-flight due to the pipe corrosion wall loss at the support. A mathematical model, a sizing algorithm and a PC program have been developed to quantitatively relate in time-of-flight to the minimum remaining wall thickness. With them, one can quantify the minimum remaining pipe wall thickness at a pipe support by simply measuring the change in the time-of-flight.
展开▼