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本标准适用于厚度12～120mm 的化学、石油工业压力容器用钢板超声波探伤,也适用于其他工业类似用途的钢板超声波探伤。一、技术操作要求1.清除被探伤钢板表面影响探伤的氧化皮、锈蚀及油污。2.使用脉冲反射式探伤仪,探测频率为2.5MHz。耦合方式为直接耦合或充水耦合。探头为单直探头或联合双直探头。3.用人工标准试块调节探伤灵敏度。人工标准试块要求如下:(1)试块用钢板应与被探伤钢板的成
This standard applies to the thickness of 12 ~ 120mm chemical, petroleum industry pressure vessel with steel ultrasonic testing, but also for other industrial similar uses of ultrasonic testing. First, the technical operation requirements 1. To be detected on the surface of the steel flaw detection, rust and oil stains. 2 using pulse reflection flaw detector, detection frequency of 2.5MHz. Coupling method is direct coupling or water-filled coupling. The probe is a single straight probe or a joint dual probe. 3. With artificial standard test block to adjust the detection sensitivity. Artificial standard test block requirements are as follows: (1) test block with the steel plate to be detected