STS Group is proud to have successfully delivered a major turnaround project for EQUATE Petrochemical Company, supporting both the Ethylene Unit (EU) and the Ethyl Benzene Styrene Monomer (EBSM) packages.
This large-scale turnaround involved meticulous planning and seamless on-site execution, with a workforce of over 3,000 personnel. A total of 861,280 manhours were completed with zero lost-time injuries (LTI), reflecting a strong commitment to safety and operational excellence.
In Ethylene Unit II, critical maintenance activities included:
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Replacement of packing in the C2301 water wash drum
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Full tray replacement in the C2317 oily water stripper
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Servicing of approximately 200 control valves
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Hydro jet cleaning of 21,000 heat exchanger tubes
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Overhaul and replacement of furnace Motor-Operated Valves (MOV)
In the EBSM unit, key achievements included:
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Hydro jet cleaning of 52,760 tubes within a single heat train in a confined space
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Cleaning of 19,258 tubes in a vertical exchanger without man entry using advanced sentinel technology
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Early completion of floating roof replacement in a benzene storage tank
This milestone underscores STS Group’s capability to execute complex turnaround projects while enhancing asset reliability and long-term performance.
Congratulations to EQUATE and all partners involved in delivering this outstanding success.






