The rail welds play a significant role in the construction of continuous welded rail (CWR) track, which directly determines the security of railways transportation. Both the welding detects are generated by missing operation during welding process and fatigue damage from high speed trains and heavy load traffic. Therefore, the effective NDT methods are expected to decrease rail flaws.
The PAUT solution for rail welds is applicable to rail types such as 38#, 43#, 50#, 60# and 75#.
This PAUT Swiss Approval testing system includes PA flaw detector (rail version), tandem Scanning Crawler, Linear PA probes with wedges, and special software for rail weld.
PA electronic scanning technology is used to achieve high-speed flaw detection. Especially with PA probes with multiple PZT elements arranged in sequence along the rail welds, the testing speed can be doubled only by performing linear scan.
Moreover, the testing results can be formed into an image and be recorded.