All Terms 5 Flashcards
SACRIFICIAL ANODES
Coupling of a more active metal to a structure resulting in a galvanic current flow through the corroding electrolyte.
SACRIFICIAL PROTECTION
Reduction of corrosion of a metal in an electrolyte by galvanically coupling it to a more anodic metal. A form of cathodic protection.
SADDLE VALVE (TAP
A
LINE)
Valve body shaped so it may be silver brazed or clamped onto a refrigerant tubing surface.
SADDLE VALVE (TAP
A
LINE)
Valve body shaped so it may be silver brazed or clamped onto a refrigerant tubing surface.
SAFETY CAN
Approved container of not more than 5 gallon capacity. It has a spring closing lid and spout cover. It is designed to relieve internal pressure safely when exposed to fire.
SAFETY CONTROL
Device to stop refrigerating unit if unsafe pressure and/or temperatures and/or dangerous conditions are reached.
SAFETY PLUG
Device which will release the contents of a container before rupture pressures are reached.
SALINITY
A measure of the concentration of dissolved mineral substances in water.
SALT SPITTING
The ability of an anion exchanger to convert a salt solution to caustic
SATURATED AIR
When the air cannot hold any more moisture.
SATURATED LIQUID
A liquid which is at saturation pressure and saturation temperature
SATURATED VAPOR
A vapor which is at saturation pressure and saturation temperature. A saturated vapor cannot be superheated as long as it is in contact with the liquid from
SATURATION
Condition existing when substance contains all of another substance it can hold for that temperature and pressure.
SATURATION INDEX
The relation of calcium carbonate to the pH, alkalinity, and hardness of a water to determine its scale forming tendency.
SATURATION PRESSURE
The point, where at a given temperature a pure substance starts to boil.
SATURATION TEMPERATURE
The point, where at a given pressure a pure substance starts to boil.
SAYBOLT UNIVERSAL VISCOSITY
A commercial measure of viscosity expressed as a time in seconds required for 60 mL of a fluid to flow through the orifice of the standard Saybolt
universal viscometer at a given temperature under specific conditions
used for the lighter petroleum products and lubrication oils.
SCALE
Surface oxidation, consisting of partially adherent layers of corrosion products, left on metals by heating or casting in air or in other oxidizing atmosphere. Also a deposit on a
heat
transfer surface resulting from precipitation of salts present in water in contact with that surface, forming a hard, dense material.
SCALE CAUSING ELEMENTS
Calcium and magnesium elements forming scale.
SCALE REMOVAL
Waterside, removal of scale using either the mechanical, the water treatment or the acid cleaning process.