69
• METRIC GAS METERS
Natural Gas
MBH =
127,116 x cu meters
Seconds
For example: Gas Meter measures 0.1 cubic Meters in
100 seconds
MBH =
127,116 x 0.1
= 127 MBH
100
Propane Gas (LP)
MBH =
383,482 x cu meters
Seconds
• NATIONAL BOARD OF BOILER AND PRESSURE
VESSEL INSPECTORS - Group composed of boiler
and pressure vessel inspectors representing states,
cities and provinces enforcing pressure equipment
laws and regulations.
• PRESSURE TEST - Operation performed to verify gas
tight integrity of gas piping following its installation or
• PURGE - To free gas conduit of air or gas, or mixture
of gas and air.
• PURGE TIME - Period of time intended to allow for
dissipation of any unburned gas or residual products
of combustion.
• QUALIFIED AGENCY
corporation, or company engaged in and responsible
for:
• Installation, testing, or replacement of gas piping,
or connection, installation, testing, repair or
servicing of appliances and equipment.
• Experienced in such work.
• Familiar with all precautions required.
• Complies with all requirements of authority
having jurisdiction.
• SAFETY RELIEF VALVE - Valve designed to relieve
pressure in hot water supply system when pressure
exceeds pressure capability of equipment.
• SAFETY SHUTOFF DEVICE - Device that will shut
ignition fails.
• SEDIMENT TRAP - Gas piping arrangement designed
to collect any liquid or solid contaminant before
reaching gas valve.
• SERVICE -Supply, installation, or maintenance of
Technician.
• TWO PIPE SYSTEM - Type of venting that allows
from each other. Fresh air may be drawn in at a
• VENT
appliance vent connector to outdoors.
• VENTING SYSTEM - Continuous open passageway
from of appliance vent connector to outdoors for
14 - GLOSSARY
240013375 REV A, [07/01/2021]
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