Eddy Current Testing for High-Pressure Heaters in Thermal Power Plants

Usage Process:

• High-pressure heaters in thermal power plants typically use carbon steel or stainless steel tubes as heat exchange tubes.
• Damage is mainly found at the inlet of the lower drainage cooling section, near the drainage outlet pipe interface, and at the top of the upper (water outlet side) superheated steam cooling section.
• Carbon steel tubes are ferromagnetic, requiring remote field eddy current testing for in-service inspection.
• Remote field probes are inserted manually or with a probe pusher for individual tube inspection.
• Technicians analyze, store, and report all signals.

Advantages:

• Supports both online and offline inspection of various metal bars, seamless pipes, welded pipes, and strips.
• External probes are used for continuous transmission and detection of surface, near-surface, and internal defects.
• Saddle-type saturators and probes are ideal for inspecting weld quality in larger diameter pipes, detecting defects such as incomplete fusion, inclusions, pinholes, pores, inner burrs, and weld beads.
• Point probes with manual or automatic scanning devices are used for spot-by-spot inspection of large or complex-shaped workpieces.
• Flexible auxiliary equipment options to suit different inspection methods and production environments.
• Can utilize existing on-site equipment or be customized for special applications.
• Lightweight and portable auxiliary devices are available for mobile inspections, with manual operation as an alternative.

On-site Remote Field Eddy Current Flaw Detection Operation for 600MW High-Pressure Heater Tubes in Service at Power Plant