Reducing Commissioning and Downtime Through Advanced Flushing and Lubrication System Cleaning Techniques

For many years, flushing and cleaning activities in lubrication systems for turbomachinery, hydraulic circuits, rolling mills, and other critical industrial systems were performed using traditional approaches, often rudimentary and with significant technical limitations. Under this paradigm, such interventions frequently extended commissioning phases or planned shutdowns, becoming part of the critical path while still failing to consistently achieve the cleanliness levels required for reliable equipment operation.

This paper presents the main technical advances and criteria that enable the optimization of flushing and system cleaning interventions, significantly reducing execution time while substantially improving cleaning effectiveness. In addition, the evolution of the ASTM D6439 standard is analyzed, comparing its original 1999 edition with the current 2024 revision, highlighting the modernization of normative criteria and their impact on current industrial practices.

A key enhancement introduced in the updated standard is the formal consideration of varnish as a critical contaminant. The paper addresses its operational impact and describes effective methodologies for varnish removal within lubrication systems.

Finally, real case studies from multiple European industrial facilities are presented, demonstrating measurable benefits in terms of improved operational reliability, reduced downtime, and verified improvements in overall lubrication system cleanliness and performance.