Make-up water – fresh water that is supplied to the boiler in order to replace water lost in the steam system.
Steam and condensate glossary
Noncondensable gases, non-condensables, incondensibles, incondensables, NCGs, etc. – gases that are called “non-condensables” because temperatures in the cryogenic range (around -150o C) are required to condense them. These gases are present in all steam systems. They increase corrosion and have a negative impact on heat transfer in exchangers, due to the fact that they behave as thermal insulation.
Pitting – corrosion of metal that takes the shape of very small corroded holes.
Plume of steam – observable form taken by steam that escapes from a pipe, a piece of equipment, etc.
Pressure gauge – instrument for measuring fluid pressure (steam, air, etc.)
Pump trap – pump that propels the liquid coming from the condensation of steam (condensate).