ASNT Level III- Visual & Optical Testing
My Level III Self Study Notes Reading 4 Section 4B
My Level III Self Study Notes Reading 4 Section 4B
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7.1 Test Object Selection<br />
Figure 68 shows typical test objects removed from their<br />
service environment. Governing codes, standards or specifications<br />
may determine the number and location of visual<br />
tests. Specific areas may contain discontinuities from forming<br />
operations such as casting, rolling, forging or extruding.<br />
Weld tests may be full length or random spots and typically<br />
cover the weld metal, fusion line and heat-affected zone.<br />
The service of a component may also indicate problem areas<br />
requiring inspection. Location of the test site directly affects surface<br />
preparation. The test site may he prepared and nondestructively<br />
inspected in situ. Removal of a sample for laboratory examination<br />
is a destructive alternative test method that typically requires a repair weld.<br />
Charlie Chong/ Fion Zhang