The ST Series Steel Tube Eddy Current Flaw Detector is a high-sensitivity non-destructive testing (NDT) system for detecting surface and near-surface defects-such as cracks, pores, inclusions, and wall thinning-in stainless steel, carbon steel, and alloy steel tubes. Using electromagnetic induction technology, it delivers accurate, real-time inspection results essential for quality assurance in industries like oil & gas, power generation, chemical processing, and aerospace. Designed for production line integration, the ST series operates at speeds of 1–20 meters per minute, supporting both inline and offline quality control. Its fully automated operation, intelligent defect marking, and digital signal analysis minimize human error and maximize inspection efficiency.
Industry Applications
Oil & Gas / Petrochemical
Inspects pipelines, heat exchangers, and reactor tubes for cracks and corrosion under high-pressure.
Power Generation
Used in boiler tubes, condenser systems, and steam generators where structural integrity is critical.
Chemical Industry
Ensures piping components are free from flaws that could lead to leaks or contamination.
Metal Manufacturing
Serves as a final quality check for welded and seamless stainless steel, carbon steel, and alloy steel tubes.
Technical parameters:
★ Detection Channel: Single channel;
★ Instrument response speed 1～20m/min;
★ Frequency range: 100Hz～1MHz, continuously adjustable with 1Hz step;
★ Can provide accurate and timely feedback signals for defect locations and perform defect delay marking;
★ Gain range: 23.0～69.0dB, continuously adjustable with a step of 1;
★ Phase rotation: 0～359° continuously adjustable with a step of 1;
★ Delayed hardware output alarm, real-time hardware output alarm;
★ Automatically generates inspection reports (including the number of inspections, qualified and unqualified numbers);
★ Can print the inspection graph for each pipe;
★ Can automatically record and display the number of defects and defect times during online continuous inspection;
★ Digital filtering: Low pass (0Hz～10000Hz) and high pass (0Hz～2000Hz); effectively suppresses interference signals on site;
★ Stability: 8 hours ≦2dB;
★ Multiple display methods: Impedance, time base;
★ Detection repeatability: Under the same inspection conditions and parameters, the same flaw signal, after 20 repeated inspections, the signal amplitude difference is ≦2dB;
★ Impedance diagram range: 5 adjustable gears;
★ Synchronous input/output controlled by internal and external clocks;
★ Sampling rate: 1～200000SPS adjustable;
★ Probe drive: Adjustable from 1% to 100%;
★ Can store a large number of inspection programs and data;
★ Independent channels can drive different types of inspection probes (probes composed of absolute and differential coils);
★ Chinese and English operation languages, online remote help;
★ Automatic calendar, time display;
★ Power supply: 2000-240V (－20%～＋20%) 50HZ±10%;
★ Ambient temperature: -10-45℃;
★ Ambient humidity: ≤85%.
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