33 results about "Corrosion under insulation" patented technology

A method of determining corrosion rate in a pipe surrounded using contactless thermography includes heating or cooling the structure and capturing a first, second and third thermal images of the structure at a respective initial time, after installation and when the pipe is entirely corroded. Corresponding heat flux values are derived from each thermal image. A ratio of the metal loss is determined as a ratio of the difference between the first heat flux and the second heat flux to a difference between the first heat flux and the third heat flux. A machine learning algorithm is trained to determine a level of corrosion in a metallic pipe structure, and a second machine learning algorithm is trained to a determine a level of deposits in a pipe structure. A corrected metal loss is determined by applying the algorithm output to the ratio of the metal loss.

A method for determining corrosion or a corrosive environment under insulation of an object where use is made of a corrosion determining assembly including multiple temperature sensors and a processor connected to the temperature sensors. The method includes measuring temperatures of an insulation layer and comparing the measured temperatures to expected temperatures. A corrosion determining assembly for determining corrosion or a corrosive environment under insulation of an object includes temperature sensors.

The invention discloses a distributed monitoring system for corrosion under an insulating layer of an industrial facility. The distributed monitoring system comprises a plurality of monitoring nodes, at least one repeater and a host, the monitoring node comprises a monitoring unit and a monitoring node body; the monitoring unit comprises a temperature sensitive element, a liquid water sensitive element and a sealing structure; the monitoring node body comprises a packaging shell as well as a signal processing circuit, a low-power-consumption wireless communication module and a micro energy module which are arranged in the packaging shell, and the monitoring node body adopts a sealed integrated structure; the monitoring node body communicates with the repeater through a low-power-consumption long-distance wireless protocol; and the repeater communicates with the host. According to the invention, through temperature and liquid water dual-parameter cooperative monitoring, early recognition and accurate early warning of the corrosion state under the thermal insulation layer are realized.