JB辕T 4730-2005《承压设备无损检测》和SY辕T 4109-2005《石油天然气钢质管道无损检测》在无损检测行业中都有着广泛的应用，但两个标准有一定的差别，在具体应用中，应根据两个标准的各自特点进行综合考虑。文章对两个标准射线部分的不同之处进行比较，目的是便于无损检测人员能更好地理解标准，更加准确地使用标准，从而保证无损检测工作质量和工程焊接质量。%JB/ T 4730-2005 "Pressure Equipment Nondestructive Testing" and SY / T 4109-2005 "Petroleum and Natural Gas Steel Pipeline Nondestructive Testing" are widely used in the NDT industry, but there are some differences between the two standards. In the specific application, the characteristics of the two standards should be considered. The paper compared the differences of the two standards in X-ray part, in order to facilitate the NDT personnel to better understand the standard, use the standard more accurately, so as to ensure the NDT work quality and quality of engineering welding.
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