No way any test points are leaking into the boiler. The only dosing tank is 50 liters, has to be manually started and doses around 30 liters par day, way less than the boilers are gaining in water level per day.

Good Day! I work as a 3rd Engineer onboard a DFDE LNG carrier equipped with 4 exhaust gas economizers and 2 auxiliary boilers. After joining the vessel, I noticed that despite complete isolation of the main feed water inlet valves (4 valves for each boiler), auxiliary feed water valves (2 valves), w...