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本标准适用于 S/D_n≤60%(S 为管壁厚度,D_n 为管内径)、外径≥Φ20mm、厚度≥2mm 的化学、石油工业用高压无缝钢管的超声波探伤,也适用于其他工业类似用途的高压无缝钢管的超声波探伤。一、技术操作要求1.清除被探伤钢管表面影响探伤的氧化皮、锈蚀及油污。2.以水浸法并用具有声透镜聚焦的探头进行探伤,探伤时,水应清洁并需保持足够的水面高度。3.探测频率为2.5～5MHz。4.探伤时,探头与被探管子表面的相
This standard applies to S / D_n ≤ 60% (S is the wall thickness, D_n for the pipe diameter), the outer diameter ≥ Φ20mm, thickness ≥ 2mm chemical and petroleum industry with high pressure seamless steel pipe ultrasonic flaw detection, but also for other industries Similar use of high pressure seamless steel pipe ultrasonic flaw detection. First, the technical operation requirements 1. To be detected on the surface of the steel pipe testing the impact of corrosion, rust and oil. 2. In flooding and with acoustic lens focusing probe for flaw detection, the water should be clean and maintain adequate water level. 3. Detection frequency of 2.5 ~ 5MHz. 4. Flaw detection, the probe and the surface of the pipe was detected