Hello everyone,
I am conducting a DCVG survey on our plant's gas lines. The coating is very old (~30 years), and has been rarely inspected. In the last DCVG survey in 2019, a moderate severity fault was detected at a location with %IR of ~16%. This time around, at that exact same location, only a small fault with %IR of ~4% was detected, and hence not of a concern. We decided to excavate and assess the coating visually at that location and
the following pictures were taken. As you can see, the coating is clearly damaged. This raises a doubt in my doubt about my current survey's reliability. But this looks like a small severity fault and not a moderate one. A lump of soil was found stuck at the coating damage location as well. In the pictures below, the breaks in the coating are exposing the metal underneath.
Is there any way I can visually discern if a coating fault is of medium or small severity. Note that there are also some points of medium and large severity in this survey which were not identified in 2019.
Thanks.
I am conducting a DCVG survey on our plant's gas lines. The coating is very old (~30 years), and has been rarely inspected. In the last DCVG survey in 2019, a moderate severity fault was detected at a location with %IR of ~16%. This time around, at that exact same location, only a small fault with %IR of ~4% was detected, and hence not of a concern. We decided to excavate and assess the coating visually at that location and
the following pictures were taken. As you can see, the coating is clearly damaged. This raises a doubt in my doubt about my current survey's reliability. But this looks like a small severity fault and not a moderate one. A lump of soil was found stuck at the coating damage location as well. In the pictures below, the breaks in the coating are exposing the metal underneath.
Is there any way I can visually discern if a coating fault is of medium or small severity. Note that there are also some points of medium and large severity in this survey which were not identified in 2019.
Thanks.
Last edited:
