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PLUMBING SYSTEM INSPECT DIAGNOSE REPAIR
BACKDRAFTING HEATING EQUIPMENT
DRAIN & SEWER PIPING
FLOODED HEATING EQUIPMENT REPAIR
FLOODED WATER HEATER REPAIR
GAS DETECTION INSTRUMENTS
GAS EXPOSURE EFFECTS, TOXIC
GAS EXPOSURE LIMITS & STANDARDS
GAS FIRED WATER HEATERS
GAS LP & NATURAL GAS SAFETY HAZARDS
GAS LP & Natural Gas Pressures
GAS PIPING, VALVES, CONTROLS
GAS BTUH, CUBIC FEET & PRESSURES
GAS CONVRSION LP-NATURAL GAS
GAS FLAME & NOISE DEFECTS
GAS IGNITER DEFECTS & REPAIRS
GAS LEAK DETECTION, LP / NG
GAS LIGHTING, PIPES, FIXTURES
GAS PIPING DEFECTS
GAS REGULATORS for APPLIANCES
GAS REGULATORS for LP TANKS
Gas Regulators, Two Stage
GAS SHUTOFF VALVES
LP Gas Tanks
GAS LP & NATURAL GAS SAFETY HAZARDS
LP & Natural Gas Pressures
METHANE GAS SOURCES
Natural Gas Combustion Products
SPILL SWITCHES - Flue Gas Detection
Types of Fuel Gas Source
MANUALS & PARTS GUIDES - HVAC
METHANE GAS SOURCES
ODORS GASES SMELLS, DIAGNOSIS & CURE
ODORS, SEPTIC or SEWER
ODORS, SULPHUR SMELL SOURCES
OIL TANK PIPING & PIPING DEFECTS
PIPING IN buildings, Clogs Leaks Types
SEWER GAS ODORS
SHUTOFF VALVE LOCATION, USE
SULPHUR & SEWER GAS SMELL SOURCES
Here we give the standard pressure ranges and pressure settings for LP gas, propane gas, and natural gas fuels, including pressures found in the distribution service piping, in the in-building gas piping, and at gas fired appliances such as gas stoves, clothes dryers, furnaces, boilers, and LP gas or natural gas fired water heaters.
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Watch out: If you smell gas you should leave the building immediately and should do so without doing anything that could create a spark such as operating a light switch or telephone. From a safe location, call your gas company's emergency line and/or your fire department. Watch Out: Immediate LP or natural gas safety hazards: if there is evidence of an LP or natural gas leak at a building, gas odors, for example, you should:
It is important to separate the LP gas (propane gas) pressures that are exerted inside the LP gas storage tank or cylinder from the LP gas pressures that should be delivered to individual appliances.
Watch out: keep in mind that piped-in natural gas found at homes where that service are available will be at different pressures, use a different regulator, and requires changes or adjustment at any appliances that are being changed from LP or Propane gas to Natural gas, or vice versa.
Why do we Need a Regulator on LP or Propane Gas Systems - how do gas regulators function?
Because of varying outdoor temperatures, the LP gas pressure inside the storage tank may be as low as 10 psi in freezing weather or as high as 200 psi with the tank exposed to sunlight in hot weather.
But the gas pressure delivered to a heating appliance (gas range, clothes dryer, gas heating furnace, gas fired water heater, etc) needs to be both constant and at the proper pressure for that appliance.
The job of the LP gas regulator(s) is to deliver LP gas (propane) at the pressure used by appliances, typically at 11 inches of water column or about 6.3 oz/sq.in (that's about 0.4 psi or pounds per square inch).
The regulator(s) have to keep gas flowing to the appliance(s) at that pressure even as pressure in the storage tank changes and even when the number of appliances consuming gas changes (as devices turn on and off in the building).
For that reason the gas regulator will increase the gas flow through itself according to pressure drops on the "low pressure" side of the regulator.
At many individual gas burning appliances, the appliance gas control valve will also regulate gas flow into the appliance burners.
See GAS REGULATORS for APPLIANCES for details.
What are Typical Natural Gas Pressures found at and inside Private Homes?
The American Gas Association offers this explanation of typical natural gas pressures, Quoting with significant editing and paraphrasing:
Gas Cylinder or Tank Regulators: Readers concerned with installing, inspecting, or testing LP Gas regulators which are found on outdoor above ground or buried gas cylinders used for storage of LP Gas on site should also see How to Inspect & Test LP Gas Tank or Cylinder Regulators.
Gas Appliance Regulators: Readers concerned with installing, inspecting, or testing LP or Natural Gas regulators which are found on appliances such as LP or Natural Gas fired boilers, furnaces, water heaters or appliances should also see How to Inspect & Test LP or Natural Gas Regulators & Controls on Appliances.
Readers concerned with changing the fuel type between LP gas and natural gas for a gas fired appliance should see our safety warnings at GAS CONVRSION LP-NATURAL GAS.
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