Use of VIS Guides
Posted on 15. Mar, 2009 by charles frenzel in NSRP
Use of VIS Guides
Distance from the surface will affect your judgment.
If you’re too far away, you won’t be able to see through the flash rust in order to determine the difference between “steel substrate may be observed” [Light flash rust] and “obscures the original steel surface” [Medium flash rust].
Heavy flash rust simply “hides the initial surface condition completely.”
For the purposes of training, and consistent quality, the Todd Pacific standard default rule is: To properly evaluate and inspect waterjetted surfaces with flash rust, the Inspector will be within touching [by hand] distance and no more than an arm’s reach from the surface being evaluated; the same as the coating’s applicator.
