Environmental Engineering Reference
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• material;
• type of weld;
• human factor;
is discussed below.
The effect of material on detectability is shown in Fig. 5.29. Comparative
analysis of the detection of discontinuities in relation to the physical
method of inspection was carried out in Ref. 82-86 and others. Figure 5.30
shows the results of the pilot study of detection of discontinuities by three
inspection methods, depending on their linear size
a.
86
The best detectability
was obtained for ultrasonic testing, the worst for radiography (RG).
Ultrasound (US), radiography and magnetic power (MP) inspection
methods were compared in Ref. 84 (Fig. 5.31)). In this case, the best
detection was shown by US inspection, the worst by MP inspection. The
Family of defects
5.29 Effect of material in which the defect is situated: 1) forged
steel, 2) fusion zone of the base metal with the weld; 3) clad
austenitic stainless steel, 4) weld.
a
, mm
5.30
Comparison of three methods of detection of discontinuities:
1) ultrasound; 2) dye penetrant, 3) radiography.
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