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Module Eleven: Fuel Gas and Fuel Oil Systems

Horizontales
Water or other fluid that has been condensed from steam or from a vapor.
The temperature at which vapors given off by a fuel may be ignited.
The removal of all unwanted substances from a gas piping line.
A nonconductive union placed on the gas main side of the meter to prevent electricity from being conducted through the customer’s service line back to the gas main.
A chemical compound that has sulfur rather than oxygen, typically added as an odorant to natural gas.
Verticales
An indicator used in diaphragm and rotary meters to indicate the amount of gas that has passed through the meter, in cubic feet.
A U-shaped tube containing fuid and marked with a graduated measuring scale, used for measuring slight changes in a low-pressure system such as a heating, ventilating, and air conditioning system. One end of the tube is connected to the low-pressure source. Slight changes in pressure cause the f uid in the tube to move up or down. Also called a draft gauge.
An extension of piping created by connect-ing a tee, nipple, and cap that is installed on underground lines to allow storage of liquefied petroleum until it changes back into a vapor.
A measure of the weight of a given volume of gas expressed as a ratio to the weight of the same volume of air under the same conditions.
A device designed to control pres-sure.