Impact of Hydrotesting

To gain a better understanding of the possible relationship between hydrotest and MIC, it is worth distinguishing between two types of hydrotest implementation methods, defined as follows [25]  

Wrong hydrotest Untreated water has been used for the test. The untreated water is water for which no chemical treatment (mainly by biocides) to remove corrosion-enhancing bacteria has been done. 

Incomplete hydrotest Operations such as draining and drying immediately to be done after the test either have not been carried out or were poorly done so that, as evidence, one can still see water in the system. 

As said above, normally untreated water is used for hydrotesting. This is perhaps due to two contradicting ideas about hydrotesting and its importance  

Hydrotesting is important because it measures how strong the component is and what the possibility of leaking is, so that the system being tested can be assessed regarding its performance before actually putting it into service. 

---