This is a question we are frequently asked when dosing chemicals in parts per million (ppm). In an attempt to help our readers we have provided the following.  Calculation assumes SG is 1:1 100ppm = 100mg/L = 0.1L/m3 500ppm = 500mg/L = 0.5L/m3 1000ppm = 1000mg/L = 1L/m3  

It is important to complete a thorough survey of a closed system. You will need to know the volume (or at least a good approximation), the metallurgy, any known problems eg: leaks, corrosion, scale etc. Usually a closed system will be one of the following – LTHW (low temperature hot water), HTHW (high temperature hot water) or some sort of […]