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本标准使用A型脉冲反射式超声探伤仪,以单斜探头接触法为主进行探伤。本标准适用于焊接件对接处厚度8～120mm的锅炉和钢制压力容器对接焊缝的超声波探伤,也适用于其他工业类似用途的压力容器对接焊缝的超声波探伤。本标准不适用于铸钢、奥氏体不锈耐酸钢及允许根部未焊透的单面焊钢制压力容器对焊接缝的超声波探伤。也不适用于曲面半径小于125mm和内半径与外半径之比小于80％的纵
This standard uses A-type pulse reflection ultrasonic flaw detector to single-tilt probe contact method for testing. This standard applies to ultrasonic welding of butt welds in boilers and steel pressure vessels with a thickness of 8 to 120 mm at the butt joint of welded parts and ultrasonic flaw detection of pressure vessel butt welds of similar industrial use in other industries. This standard does not apply to cast steel, austenitic stainless steel and stainless steel to allow the root of the single-sided welded steel pressure vessel butt weld ultrasonic testing. Also does not apply to the surface radius less than 125mm and the inner radius and outer radius ratio of less than 80% of the vertical