The tanks have been completed today, so testing starts. As you can see there are some leaks… We use a compressor to fill the tanks with compressed air, and then the good old soap and water trick to look for leaks.
Leak testing was started this morning. All welds are tested for leaks before they are grinded down to the final surface shape. Two different sprays are used. The inside of the hull is sprayed with a very fine white titanium oxide powder. The outside with a strong color agent. If there are even the smallest porous holes in the weld, the color will creep through the weld and show up as colored spots on the inside.
(…and in the background of this picture you can see the attachment points for the lifts are being put on, which means that we are now very close to turning the hull around)