The oil removal process from the surface of the oxygen lines in 304 quality, which will be supplying oxygen to the newly established Petkim Star Refinery in Aliağa district of İzmir province, has been completed via planning and under supervision of Deser, with the chemicals produced by Deser Kimya. The necessary analysis was regularly carried out and reported by our engineers and submitted to the Subcontractor, Es Group. During the treatment, the carbon steel return pipeline was also cleaned by the pickling process. The sample setup prepared after the operation executed precisely under very high work safety was sent to the accredited laboratory for oil analysis.