Reduce fouling and eliminate corrosion in the lead up to planned shutdowns and turnarounds.

Pre-Shutdown Online Cleaning Specialists
It is vital for plants and refineries that shutdowns and turnarounds are completed on time and on budget to ensure that they can resume operations as quickly as possible. Unfortunately, with boilers and process furnaces, slagging, fouling and corrosion can result in extensive cleaning times.
Using Therma-Chem’s products in the lead up to shutdowns and turnarounds can ensure that units are pre-conditioned so that cleaning is easier, quicker and safer for maintenance teams.
Application of our technology ensures that fouling is substantially reduced, any remaining deposits are soft and easy to remove and, finally, that corrosion is completely eliminated, even in high moisture environments.

Deposits easily removed by hand in the preheating section of a Hydrogen Reformer after pre-shutdown cleaning programme by Therma-Chem.


Eliminate slagging and improve
heat transfer.

FS12 removes slagging from the tube walls and converts it to dry, friable powder. This results in increased heat transfer and restored capacity.


Prevent high temperature corrosion


Limit fouling and maintain flue gas velocity


Improve performance and reduce maintenance


Prevent dew point corrosion from sulphuric acid


Improve particulate removal and reduce cleaning time


Reduce NOx, SOx and
Carbon emissions


Improve performance and
prevent corrosion

How Does FS12 Work

Therma-Chem’s FS12 is an mildly alkaline solution containing nitrates that is designed specifically to clean boilers online. Using Therma-Chem’s proprietary injection system, the liquid is injected directly into the furnace, vaporises and is carried by the flue gas through the unit, encountering all heat transfer surfaces including the waterwalls, superheaters, economiser, and air pre-heater.

FS12 reacts with existing hard deposits and fouling on tubes by increasing their melting point and reduces them to soft powdery ash.

FS12 also neutralises sulphur deposits on the cold end of the flue gas path preventing cold end corrosion and eases man entry during a maintenance or inspection shutdown.

Using FS12 for shutdowns and turnarounds results in the reduction of ash deposits, prevention of both high temperature and low temperature corrosion, and a safer operating environment for maintenance teams. Ultimately, this leads to quicker and safer turnarounds.

During the 40 day turnaround period the tubes did not go hygroscopic even when exposed to normal wet atmosphere for 40 days, therefore, there was no sulphuric acid corrosion attack issues and the main aim of the Injection Programme was fulfilled.

Combustion Specialist


Utilised in the run up to a shutdown to facilitate a more effective and easier clean of a unit, FS12 can be applied 3-4 times per day for a period between 30 – 90 days.This ensures that during the shutdown, cleaning is more effective, easier, quicker and any vanadium pentoxide and sulphuric deposits are neutralised, dry, and entry into all areas of the unit is safe and comfortable.