Description: Multi-channel NDT (non-destructive testing) system for boiler tube inspection avoids expensive boiler tube failures in the plant. This system is an innovative OD scanning system and method for testing waterwalls, superheaters/ heaters/economisers, and other tubing/piping. This multi-channel system detects and quantifies ID, OD, and internal material defects in ferrous and non-ferrous materials. The system uses a dry non-contact method based on the principles of electromagnetics. It is for giving uniform surface scale and tests at a scanning speed of 10 to 15 ft (3 to 4.5 m) per minute. The system is fast, accurate, cost effective, and field proven. Furthermore the system can be adapted to many different applications, such as testing ligaments, bends, space constricted areas, and small diameter tubing. Advantages and design features include dry non-contact method, no need for couplant, uniform rust, scale; and coatings have no impact on testing process and a variety of contoured scanners to fit any tube/pipe diameter. Special application scanners are available for many different tasks, such as ligaments, bends, space constricted areas, and small diameter tubing.
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