ASME对接焊缝超声检测标准简介及其与JB4730的比较

介绍了ASME锅炉压力容器法规中有关承压设备焊接接头超声检测（UT）的一些重要规定，包括UT规程的量化要求、校验试块的型式和特点、DAC曲线的绘制和组成，以及验收标准的定性、定量和定级要求等。与JB4730标准进行了比照分析，可为承压设备焊缝UT标准的国际接轨和国际协调提供参考。

Introduction of ASME Ultrasonic Examination Standard for Welded Joints and its Comparison with the Chinese Standard JB 4730

Some important specifications of ultrasonic testing （UT） for welded joints of pressure equipment offered by ASME BPVC Code were outlined, including the quantifying requirements of UT procedures, the type and characteristics of the calibration blocks, the plotting and form of the DAC curves, and the demands on indication characterization and measurement and classification in the acceptance criteria and so on. A comparison was made between the ASME Code and the chinese standard JB 4730, aiming at providing a reference for the UT standard of pressure vessels linking or harmonizing with international standard.