Visualexamination detected blood spatter contamination in 50.5% (303/600) of the face shields, whereas leucomalachite green staining detected blood contamination in 66.0% (396/600).
If the test piece fails to comply with any of the requirements for visualexamination or NDT specified in 7.5, one further test piece shall be welded and subjected to the same examination.
如果试件不符合7.5规定的外观检查或非破坏性检查的要求,应再取一个试件进行焊接,并进行同样检查。
3
By using visualexamination, scanning electronic microscope, X-ray energy spectrum and metallurgy and chemical analysis, the cause of crack occurred in bellow expansion joint was analyzed.