--- title: Online Cleaning of Heat Exchangers LP --- [![zymeflow_logo_white.svg fill](https://info.zymeflow.com/hubfs/Zymeflow-2024/Images/zymeflow_logo_white.svg%20fill.svg) ](https://www.zymeflow.com/) # Online Cleaning of Heat Exchangers The Challenge: Maintaining Heat Exchanger Efficiency without Disrupting Operations A major US refinery, processing variable opportunity crudes, faced diminishing efficiency in its pre-heat exchangers on a diesel hydrotreater unit. With no option to isolate exchangers and prior unsuccessful chemical treatments, the refinery needed a solution to improve capacity without a costly shutdown that could disrupt regional diesel supply contracts. Discover how ZymeFlow’s innovative approach kept the diesel hydrotreater running at full capacity without shutdowns. **Get the Full Case Study** Ready to dive into the details? Fill out the form below to download the full case study and discover how ZymeFlow can benefit your facility. [![zymeflow_logo_white.svg fill](https://info.zymeflow.com/hubfs/Zymeflow-2024/Images/zymeflow_logo_white.svg%20fill.svg) ](https://www.zymeflow.com/) © 2026 ALL RIGHTS RESERVED.