Case | A steel plant's water treatment maintenance project has been successfully completed

Lefilter2026-01-30 BACK TO LIST

Recently, a major overhaul project for water treatment at a steel plant undertaken by Lefeldt has been 

successfully completed. The project covers the replacement of quartz sand filter media and anthracite 

filter media, inspection and maintenance of electrical control cabinets, controllers, and signal lines. It has 

passed the acceptance inspection and been delivered for use.


Promote collaboration and sound the 'charge'

This maintenance project has multiple items, tight schedule, and heavy tasks, covering over a hundred 

large and small maintenance tasks. In order to ensure that this task is completed on schedule, with quality 

and quantity, a mobilization meeting was held in advance to divide the work reasonably. Each major 

maintenance project was refined and decomposed, and key progress nodes, specific responsible persons, 

and various guarantee measures were clearly defined.


Emphasize safety and tighten the 'safety string'

We always put safety first and plan before taking action. To ensure the safe and orderly progress of all work, 

each team organizes safety training before construction, including risks and hazards in maintenance operations, 

correct wearing of protective equipment, emergency response measures in case of accidents, etc., effectively 

strengthening safety awareness and tightening the "safety string".

Show your hand and treat the 'stubborn illness'


These devices and containers will accumulate a large amount of dirt, sludge, waste oil, and powder during 

long-term operation, and the operable space inside the tank is narrow with dim lighting, making maintenance 

difficult.


Clear the flower board, clean the sand, install the filter cap, inspect the weld seam, remove the exhaust valve... 

No matter how hard or tiring it is, always focus on every operation in hand. These touching scenes become 

the most beautiful scenery.



Focus on key points and strive for high standards


  • The filter cap is installed evenly and without looseness

  • The filter material is layered and installed smoothly, without any sand leakage

  • The central pipe and its associated valves have no leakage

  • The grate is reinforced and stable, with no looseness

  • After repair, the water quality reaches the filtering effect

  • The tank body is corrosion-resistant without any omissions or rust spots

  • The material of the filter cap is ABS and must meet the national technical requirements

  • Ensure normal backwashing and ensure that the filtered water quality meets the requirements

  • Use metal wrapped pads for interface pads and manhole blind pads

  • After passing the test, the sealing of each inlet hole and interface is reliable


The LEFILTER EPC project department has developed targeted measures in terms of project safety, civilized construction, on-site operations, quality process control, and confined space operations. They have strengthened on-site inspections and conducted high-quality coordination meetings to achieve controllable work progress, reasonable personnel operations, and clear sources of operational risks. They have also improved 6S refined management to ensure the smooth progress of major maintenance projects.





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