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See Chinese contents: GB/T 34370.9-2020 GB/T 34370.9-2020: Nondestructive testing of amusement equipments -- Part 9: Magnetic flux leakage testing
This Part of GB/T 34370 specifies the method of magnetic flux leakage testing and result evaluation for amusement equipment. This part is applicable to the magnetic flux leakage testing of ferromagnetic material components such as steel pipes with an outer diameter of no less than 38mm and a wall thickness of no more than 20mm, steel plates with a thickness of no more than 20mm, and steel wire ropes and cables with a diameter of no less than 6mm for amusement equipment.
