长输管道试压头的射线检测方法探讨  

Discussion on radiographic testing method for pressure test head of long distance pipeline

作　　者：李向东 周学军 王子龙[3] LI Xiangdong;ZHOU Xuejun;WANG Zilong(Daqing Petrochemical Safety and Environmental Protection Engineering Supervision Station,Daqing 163714,China;Technological Supervision Center of Petro China Changqing Oilfield Company,Xi'an 710018,China;Jilin Yaxin Engineering Inspection Co.,Ltd.,Jilin 132021,China)

机构地区：[1]大庆石化安全环保工程监督站,黑龙江大庆163714 [2]中国石油长庆油田分公司技术监测中心,陕西西安710018 [3]吉林亚新工程检测有限责任公司,吉林吉林132021

出　　处：《石油工程建设》2021年第5期74-76,共3页Petroleum Engineering Construction

摘　　要：长输管道在进行分段试压时,需要使用一个称之为试压头的重要部件。试压头焊口检测要求与主线路管道一致,即要求进行100%的射线检测。利用以往的检测经验,采用双壁单影检测技术对试压头进行检测需要经过一系列复杂的计算过程,效率相对较低。在大庆石化某项目长输管道试压头焊缝检测中,辅助采用了计算机软件AutoCAD对试压头、射线源焦点位置等进行1∶1比例绘图,确定了检测区角度和长度,并对中心有挡管等障碍物的试压封头焊口的射线检测工艺进行优化,由此提高了检测效率。The pressure test head is an important component of long-distance pipeline when it is used for sectional pressure test,the detection requirement of the pressure test head weld joint should be consistent with the that of the main pipeline,that is,100%radiographic testing is required.Based on the previous testing experience,as applying the the double wall single shadow detection technique to detect the pressure test head,a series of complicated calculations are needed,and the efficiency is relatively low.In the long-distance pipeline of a certain project of Daqing Petrochemical Company,the computer software AutoCAD was used to perform 1∶1 proportional drawings of the pressure test head and the focus position of the radiographic source,determined the angle and length of the detection area,and optimized the radiographic inspection process of the weld joint of the pressure test head with obstacles in the center,so as to improve the detection efficiency.

关 键 词：长输管道 试压封头焊缝 双壁单影检测 AUTOCAD辅助设计 

分 类 号：TG441.7[金属学及工艺—焊接]