管道环焊缝数字射线成像检测最少透照次数的确定

Determination of the minimum times of digital radiography needed for pipeline girth weld

国内现行数字射线成像检测标准对于管道环焊缝的最少透照次数都没有简单、有效的确定方法,而直接参照射线胶片检测的最少透照次数来确定有很大的局限性。依据标准SY/T4109.5-2013,分别针对双壁单影透照法与中心内透照法,分析了影响最少透照次数的因素,并提出了确定最少透照次数的计算公式,以便于检测人员参考。

There is no simple and effective method to determine the minimum times of digital radiography needed for pipeline girth weld.And the minimum times deduced by referencing to RT has great limitations directly.Based on SY/T 4109.5-2013,this paper analyzes the factors affecting the minimum times for DWSI and SWSI respectively,and proposes a calculation formula for NDT personnel.