Wastewater Conveyance - Wastewater Operators - page 151

extruding— Process of shaping a metal or plastic by forcing it through
a die.
ferrous— A term applied to a metal that contains iron.
ferrule— A short bushing used to make a tight connection.
filter— An accessory fitting used to remove solids from a fluid
stream.
fluid— Any substance that flows.
flux— Used in soldering to prevent the formation of oxides during the
soldering operation and to increase the wetting action so solder
can flow more freely.
friable— Readily crumbled by hand.
gate valve— A valve in which the closing element consists of a disk
that slides across an opening to stop the flow of water.
gauge pressure— The amount by which the total absolute pressure
exceeds the ambient atmospheric pressure.
globe valve— A valve having a round, ball-like shell and horizontal
disk.
joint— A connection between two lengths of pipe or between a length
of pipe and a fitting.
laminar— Flow arranged in or consisting of thin layers.
mandrel— A central core or spindle around which material may be
shaped.
metallurgy— The science and study of metals.
neoprene— A synthetic material that is highly resistant to oil, flame,
various chemicals, and weathering.
nominal pipe size— The thickness given in the product material
specifications or standard to which manufacturing tolerances are
applied.
nonferrous— A term applied to a material that does not contain iron.
Piping systems— A complete network of pipes, valves, and other
components.
Ply— One of several thin sheets or layers of material.
Pressure-regulating valve— A valve with a horizontal disk for auto-
matically reducing water pressures in a main to a preset value.
Prestressed concrete— Concrete that has been compressed with wires
or rods to reduce or eliminate cracking and tensile forces.
PvC— Polyvinyl chloride plastic pipe.
Schedule— Approximate value of the expression 1000 P / S , where P is
the service pressure and S is the allowable stress, both expressed
in pounds per square inch.
Single-line diagram— Uses symbols for all the diagram components.