To see the exterior surface of the pipe that has Zinc. Sticks to the pipe surface like NG work or not. 2. To see if Flare causes Zinc crack like NG work or not.
Observe the characteristics of the external surface of the pipeline, and see if there is zinc adhesion on the surface of the pipeline, which is the same as that of NG.<br>2. See if Flare produces zinc cracks like NG.