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本标准适用于以外穿通式涡流探伤方法检测冷拉航空高压导管、普通导管及一般用途的薄壁圆管。被检管材外径φ6～22mm;壁厚0.5～1.5mm。 1 检测原理管材纵向通过一种或几种频率的交流电流激励线圈,线圈的电性能由于管材的接近而变化,这种变化取决于线圈与管材间的距离、管材的几何尺寸、导电率和导磁率、以及管材的冶金与机械缺陷。当管材通
This standard applies to the other through-type eddy current testing methods for cold-drawn aviation high-pressure catheter, ordinary catheter and general purpose thin-walled tube. Seized pipe diameter φ6 ~ 22mm; wall thickness 0.5 ~ 1.5mm. 1 Detection principle Longitudinal tube through one or several frequencies of alternating current excitation coil, coil electrical properties due to the pipe close to the change, this change depends on the distance between the coil and the pipe, the pipe geometry, conductivity and conductivity Magnetic, and metallurgical and mechanical defects of the pipe. When the pipe through