Eddy current testing machine (ECT), is a non-destructive testing method. Exclusively for providing examinations of the materials, components and parts of pipes, high pressure vessel, boiler, aircraft, vehicles and bridge etc. in industries including but not limited to shipbuilding, petrochemical, chemical, mechanical, aerospace, transportation and construction. As well as the quality inspection of workpiece of light metal, rubber and Ceram.
Eddy current testing machine is one of the non-destructive low frequency eddy current. To explain this more specifically, the machine excites the magnetic line of force to send coil to diffuse outward through the wall of pipe, then the magnetic force will be captured by testing coil after it pass through the defect in the surface, diffuse to the inner tube at the far end. This is the machine which can detect the flaws in the inner and outer of both ferromagnetic and non-ferromagnetic pipe. The amplitude and phase received by the coil are highly related with the thickness of the wall. Skin effect, electrical conductivity and magneto conductivity are isolated during the testing process. In the pipeline inspection, the internal penetration probe is used, and the cracks, pits, corrosion, thinning and internal defects of the pipe wall material can be measured in one pass through the pipe. Weak signals have the advantages of large signal-to-noise ratio, stable performance and anti-interference ability.
It adopts digital design, which can establish standard testing procedures in the instrument, convenient for users to call during on-site testing. It can be used for flaw detection and wall thickness measurement of metal parts in petrochemical plants, water gas plants, oil refineries and power plants, as well as flaw detection, analysis and evaluation of various ferromagnetic pipelines. For example: pre-service and in-service inspections of boiler tubes, heat exchanger tubes, underground pipelines and cast iron pipelines.