The exploration to the case of X-ray detection of the vertical angle Weld
To irradiate uprightness intersection pipe welds with x-rays, the base metal on both sides of the seam meet in a miter joint, the ray beam and the surface of the detected region is not vertical. As extending from the welding centerline to the outside of the base metal, the ray beam casts more obliquely. In addition, the certain difference in the thickness between the supporting pipes wall and its branch pipes wall makes the thickness difference in the effectively detected region being irradiated obviously increased. The greater the thickness difference is , the harder to obtain the quality sensitivity and the film density which meet the standard requirements in the effectively detected region at the same time .This paper presented an acceptable method on subdivision、radiographic thickness、radiographic mode and exposal parameters by analysis and experiment of the X-ray inspection on uprightness intersection pipe welds. The experiment results validated that this method could get better imagery quality, and the density difference of the film valid area and image sensitivity could satisfy requirement on JB/ T 4730 -2005 <Nondestructive Testing of Pressure Equipments>.
uprightness intersection pipe welds thickness difference X-ray inspection
Weiming YAN Pengfei ZENG Guoqiang ZHANG Bin ZOU Xiaoming NIU
Chongqing Construction Engineering Non-destructive Test Limited Company,Chongqing ,China
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
216-222
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）