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The periodic inspection of pressure vessels has great applications
Release time:
Jul 28,2024
Under strict management in the design, manufacturing, inspection, and use of large pressure vessels, serious defects are rarely found. Therefore, how to extend the operating cycle of pressure vessels and shorten the inspection time as much as possible while ensuring their safe operation is a concern for the majority of pressure vessel users. Acoustic emission technology meets the above requirements due to its simplicity, economy, high sensitivity, and ability to detect "dynamic" defects and assess the hazard level of defect types. It can greatly shorten inspection time, reduce downtime, minimize losses caused by blind repair and scrapping of pressure vessels, and avoid the cost of auxiliary work such as opening and polishing. It has developed into one of the main non-destructive testing methods for pressure vessel inspection and safety assessment, and therefore has a huge application market in the regular inspection of large pressure vessels in use. Promoting the application in Guangxi will bring huge economic benefits to users. The principle of acoustic emission technology. The phenomenon of rapid release of energy from local sources in materials to generate transient elastic waves is called acoustic emission. Acoustic emission technology is a technique used to monitor defects such as crack propagation and rupture by releasing acoustic energy through a group of acoustic emission sensors on the outer surface of the equipment during in-service pressurization, such as hydraulic testing, in order to monitor these defects. The advantages of acoustic emission technology. Compared with other non-destructive testing methods such as radiation and ultrasound, acoustic emission technology has the following advantages in the detection of large pressure vessels: due to providing dynamic information of defects under stress, it is suitable for evaluating the actual harmful degree of defects to the structure; Realize continuous online monitoring, suitable for industrial process online monitoring and early or near failure prediction; Due to the low proximity requirements for the inspected components, it can adapt to complex detection environments such as high and low temperatures, nuclear radiation, flammable, explosive, and toxic environments; Due to insensitivity to the geometric shape of the component, it is suitable for complex shaped components that are limited by other detection methods; By utilizing multiple channels to achieve rapid detection of the entire or large area, with minimal removal of the insulation layer, the location of defects can be determined through a single loading or testing process. The detection efficiency is high, which can greatly save time and money, and some can even avoid processes such as opening cans, resulting in significant economic benefits.
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