Date: February 2018 & October 2020
Customer: Uniper Energy
Uniper Energy had a large water heater that isn’t currently being used, and so the decision was made to mothball it for approximately two years.
1) The Task
HSL were approached to provide a solution to prevent the water tank and the internal gas path from any further corrosion during the mothballing period.
2) Product Used
3) The Solution
The exhaust stacks, the top and bottom of the filter housings was sealed with MilCorr. The MilCorr was then heat shrunk using a propane powered heat gun
The gas path was treated with VpCI 337 at a rate of 1L/m3 using an airlessco LP 540 sprayer. A low grade carbon steel plate was hung in the gas path as visual evidence that no degradation / corrosion was taking place.
The water tank was being left with a water/glycol mix in it, so VpCI 649 was added at 2%, this was pumped into the tank and then circulated to ensure a good mix.
This treatment has resulted in the low cost storage of this high value asset for up to two years.
Note: In October 2020 (almost 3 years later), Uniper requested the water heater be re-treated, the plate pictured below was taken when the gas path was opened up, proving protection from corrosion had been achieved.