71
• 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
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
supply to controlled burner in event source of 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 goods
14 - GLOSSARY
• TWO PIPE SYSTEM - Type of venting that allows for
• VENT
appliance vent connector to outdoors.
• VENTING SYSTEM - Continuous open passageway from
of appliance vent connector to outdoors for purpose of
240013360
REV A [07/01/2021]
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