External insulation of spherical tanks of a refinery
Hellenic Refinery in Aspropyrgos (Athens) Greece
![Hellenic Raffinerie Aspropyrgos (Athen)](files/isopol.de/referenzen/raffinerie/raffinerie1.jpg)
For the insulation of spherical tanks of a refinery in Greece, the task was to coat the tanks with polyurethane in-situ foam using a spray process with an insulation thickness of at least 40 mm.
![Kugeltank, überzogen mit Flugrost](files/isopol.de/referenzen/raffinerie/raffinerie2.jpg)
The tanks, which were welded on site and had a diameter of about 35 m, were found to be heavily rusted. A scaffold had been attached directly to the tanks by the customer by means of welded-on lugs.
![Kugeltank, beschäumt](files/isopol.de/referenzen/raffinerie/raffinerie3.jpg)
the spray foam is applied in several layers. To avoid cold bridges, the metallic parts of the supporting pillars are also foamed.
![Kugeltank, beschäumt und obere Hälfte mit Elastomer beschichtet](files/isopol.de/referenzen/raffinerie/raffinerie4.jpg)
The first spherical tank has been foamed. The elastomer coating (in white, to prevent heating) has already been sprayed onto the upper half of the sphere.
![Kugeltank fertig](files/isopol.de/referenzen/raffinerie/raffinerie5.jpg)
Finished tank coated with white elastomer.