The works were carried out at the industrial facilities of Hellenic Petroleum SA in the area of Aspropyrgos, Attica, and included the following:
§ Blinding, opening of furnace, construction of internal scaffolds for inspection
§ Replacement of tubes at the radiant section and supports recommended during the inspection, quality control, hydraulic test
§ Closing of furnace, restorations and precommissioning
§ Various maintenance works for unit U-3100, such as 8’’ line replacement at the top of tower Ν-4002, replacement of part of steam line S1 4”
Tube section: 6” and 4’’, thickness 8.5mm, material Α-213 GrT9, length 16,670mm
20 tubes of 6’’ and 4 tubes of 4’’ were replaced.
Welding in total: 6” 120 pcs, 4” 16 pcs
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