Natural Gas
Below you will find a complete index of our covered "Natural Gas" topics.
- 2-PSIG Gas Piping System
- Abandoned Well
- Abandonment
- Abandonment Costs
- Abbreviated Application
- Abiogenic Theory
- Above The Line
- Absolute Open Flow (AOF)
- Absolute Pressure
- Absolute Viscosity
- Absolute Zero
- Absorbent
- Absorption
- Absorption Plant
- Absorption Refrigerating System
- Absorption Type Air Conditioner, Direct Fired
- Accelerated Cost Recovery System (ACRS)
- Acceptance For Filing (of A Rate Schedule)
- Acceptance Test
- Accrual
- Accumulated Deferred Income Taxes
- Accumulated Provision For Depletion
- Accumulated Provision For Depreciation And Amortiz
- Acetone Test
- Achievable Potential
- Acid Gases
- Acid Rain
- Acidizing
- Acquisition Adjustments
- Acre Feet Of Water
- Acre Foot
- Acrylonitrile-Butadiene-Styrene (ABS)
- Acrylonitrile-Butadiene-Styrene (ABS) Pipe And Fit
- Action Plan
- Actual Cost
- Ad Valorem
- Adaptor Plate, Instrument
- Additions To Utility Plant
- Adhesive
- Adhesive, Solvent
- Adiabatic
- Adjustment Clause
- Administrative Law Judge (ALJ)
- Adsorption
- Advance Payments
- Advances For Construction
- Affiliated Entities Test
- Affiliated Marketer
- After-Cooling
- AFUDC
- Age Interval
- Agent
- Aging
- Agreement And Undertaking
- Agreement On Principles
- Air Change
- Air Conditioner, Room
- Air Conditioning
- Air Conditioning Central
- Air Diffuser
- Air Heater
- Air Receiver
- Air Shutter
- Air-Gas Ratio
- Alaskan Natural Gas Transportation System (ANGTS)
- Aliphatic
- Allocated Pool
- Allocation
- Allocation Method
- Allocation-Capacity
- Allocation-Measurement
- Allocation-Supplies
- Allocation-Supplies To End-Use Customers
- Allowable Working Stress
- Allowables
- Allowance For Funds Used During Construction (AFUD
- Allowed Rate Of Return
- Alternate Fuel Capability
- Alternate Fuels
- Alternative Fuels
- Amagat's Law
- Ambient Vaporizer
- American Gas Association (AGA)
- Amorphous
- Amortization
- Anemometer
- Annealing
- Annealing, Bright
- Annual Fuel Utilization Efficiency (AFUE)
- Annual Gas Consumption (Sales) Per Customer (By Cl
- Annual Gas Revenue Per Customer
- Annual Volume Method
- Annualization
- Annulus
- Anode, Sacrificial
- Anodic Inhibitor
- Anodic Polarization
- Anodic Protection
- ANS Preferred Number
- ANSI
- ANSI X12
- Anthracite Coal
- Anti-oxidant
- Anticline
- Appropriate State Regulatory Agency
- Aquifer Storage
- Arms-Length Bargaining Or Negotiation
- Aromatic
- As-Billed
- ASA
- Asset Depreciation Range (ADR)
- Assets (and Other Debits)
- Assignee
- Associated Gas
- Associated Gas Proration
- Associated Liquids
- Atlantic Seaboard
- Atlantic-Seaboard Classification Method
- Atmosphere
- Atmospheric Pollution
- Atmospheric Pressure
- Atom
- Atomize
- Attenuation
- Attrition
- Audits
- Authorized Over-Run
- Automatic Adjustment Clause
- Automatic Ignition
- Automatic Meter Reading (AMR)
- Auxiliary Devices
- Available Heat
- Average Invested Capital
- Average Revenue Per Unit Of Gas Sales (By Class Of
- Average Service Life
- Avogadro's Law
- Avoided Cost
- Back Pressure
- Back-Fill
- Back-Fire
- Backhaul
- Backstopping
- Badge, Meter
- Baffles
- Bag Hole
- Bag-Off
- Bailer
- Balance, Gas
- Balancing
- Balancing Agreement
- Balancing Penalty
- Balancing Provisions
- Balancing Units
- Band Clamp
- Bar Hole
- Bar Test Survey (For Gas Mains)
- Barometer
- Barrel (Oil)
- Base Conditions
- Base Contract Price
- Base Cost Of Gas
- Base Gas
- Base Load
- Base Load, Residential
- Base Period
- Base Pressure
- Base Pressure Index
- Base Tariff Rate
- Base Volume Index
- Baseboard Radiator
- Basic Air Or Gas Time
- Beam Loading
- Behind The Pipe
- Bell Hole
- Bell Joint Clamp
- Bell-and-Spigot Pipe
- Below The Line Vs Above The Line
- Benefit-Cost Ratio
- Benzene
- Berm
- Best Available Control Technology (BACT)
- Best Efforts
- Betterments
- Bevel
- Bi-Monthly Billing
- Bill Frequency Analysis
- Billing Cycle
- Billing Determinant
- Binder
- Bio-Gas
- Biodiversity
- Biogenic Theory
- Biomass
- Biomass Conversion
- Bit, Drilling
- Bituminous Coal
- Black Steel Pipe
- Blanket Certificate
- Blanket Transportation Certificate
- Blanking
- Blind Flange
- Block Valve
- Blow Down
- Blow Joint
- Blow-off Valve
- Blower
- Blue Gas
- Boil Off
- Boiler
- Boiler Efficiency
- Boiler Fuel Gas
- Boiler Pressure
- Boiler Rating
- Boiler, High Pressure
- Boiler, Low Pressure
- Boiling Point
- Bond Ratings
- Bond Yield Risk Differential (BYRD)
- Bonds (Mortgage)
- Book Cost
- Book Value
- Book Value Per Share Of Common Stock
- Boom Cat
- Booster
- Booster Station
- Boston Box
- Bottle
- Bottle, Cubic Foot
- Bottled Gas
- Bottom Gas
- Bottom Hole (Rock) Pressure
- Bottom Hole Contract
- Bottom-Cycle Plants
- Bottoms
- Bourdon Tube
- Boyle's Law
- Bradenhead
- Bradenhead Gas
- Branch Connection
- Branch Line Or Take Off
- Breeching
- Brine
- British Thermal Unit (Btu)
- Broker
- Brokerage Of Gas
- Brokering
- Btu Adjustment Clause
- Btu Method
- Btu Per Cubic Foot
- Btu, Dry
- Btu, Saturated
- Buddy Swap
- Budget-Type Certification
- Building Envelope
- Bulk Plants For LP Gas
- Bulkhead
- Bull Plug
- Bundled Sales Service
- Bundled Service
- Bunker "C" Fuel Oil
- Burn-Pit
- Burner Capacity
- Burner Head
- Burner Port
- Burner Tip
- Burner Unit
- Burner, Automatically Lighted
- Burner, Conversion
- Burner, Gas
- Burner, Manually Lighted
- Burner-tip
- Burner-tip Price
- Burst Strength
- Burst Test
- Butane
- Butane (C4H10)
- Butane-Air Plant
- Butt-Weld
- Butylene Plastics
- Buy-Out Costs (Buy-Down Costs)
- Buyer Protection Clause
- Buyer's Right Of First Refusal
- By-Pass
- By-Products (Residuals)
- Bypass
- Cable Tool
- Cable-tool Drilling
- Calculated Bill (Also Interim Bill Or Estimated Bi
- Calculated Depreciation Reserve
- Calibrate
- Calorimeter
- Cap
- Cap Rocks
- Capacity Allocation
- Capacity Assignment/Brokering
- Capacity Factor
- Capacity Release
- Capacity Rights
- Capacity, Effective
- Capacity, Heat
- Capacity, Installed
- Capacity, Peaking
- Capital Asset Recovery
- Capital Costs
- Capital Structure
- Capital Structure, Hypothetical
- Caprock
- Captive Customers
- Carbohydrates
- Carbon Black
- Carbon Dioxide (CO2)
- Carbon Monoxide
- Carbon Monoxide (CO)
- Carbon/Hydrogen Ratio
- Carbonaceous Material
- Carburizing
- Carryover
- Cascade Cycle
- Case-in-Chief
- Cash Incentive
- Cashout Provisions
- Casing
- Casing, Well
- Casing-head Gasoline (Naphtha)
- Casinghead Gas
- Cast Iron Pipe
- Catalyst (Catalyzer)
- Catalytic Cracking
- Catalytic Rich Gas (CRG)
- Catenary Support
- Cathode
- Cathodic Protection
- CD
- CD Conversions
- Ceiling Panel Heating
- Ceiling Price
- Cellulose Acetate Butyrate Plastics (CAB)
- Celsius Scale
- Centrifugal Pump
- Ceramic Radiants
- Certificate Condition
- Certificate Of Necessity (for Amortization)
- Certificate Of Public Convenience And Necessity
- Certified Capacity
- Charge
- Charles' Law
- Check Meter
- Check Valve
- Chemical Resistance
- Chill Factor
- Chimney Connector
- Chimney Effect
- China Walls
- Choke (Nipple)
- Christmas Tree
- Chromatograph
- Circulated Gas-Oil Ratio
- Circulator
- City Gate (Town Border Station)
- City Gate Rate
- City Gate Station
- Class Life Asset Depreciation Range System (CLS)
- Class Of Service
- Classification Of Costs
- Clause, Adjustment
- Clause, Favored Nations
- Clean Air Act Of 1970 (as Amended)
- Clear Gas
- Clearing Accounts
- Climate Change
- Closed Water Piping System
- Co-firing
- Coal Equivalent Of Fuels Burned
- Coal Gas
- Coal Gasification
- Coal Liquefication (Coal Hydrogenation)
- Coal Rank
- Coal Seam Gas
- Coalbed Methane
- Coated Pipe
- Coefficient Of Expansion
- Coefficient Of Performance
- Cogeneration
- Coincidence Factor
- Coincident Demand
- Coke
- Cold Expanded Pipe
- Cold Flow
- Combination Utility
- Combined Accounts
- Combined-Cycle
- Combo Heater
- Combuster Basket, Can Or Chamber
- Combustible Constituents
- Combustible Limits
- Combustible Material
- Combustion
- Combustion Analysis
- Combustion Control
- Combustion Tests
- Combustion, Products Of
- Commercial Paper
- Commercial Service
- Commingled Gas
- Commission
- Commodity Charge
- Commodity Costs (Rate)
- Common Capital Stock Or Common Stock
- Common Carriage
- Common Costs
- Common Plant
- Common Stock Dividends
- Common Stock Equity
- Common Stock Equivalent
- Common Trench
- Communities (Served)
- Company Storage
- Company Used Gas
- Comparability Of Service
- Comparable Earnings
- Comparison Group
- Compatible
- Completion
- Composite Book Depreciation
- Compressed Natural Gas (CNG)
- Compressibility
- Compressibility Factor
- Compression
- Compression Cycles
- Compression Efficiency
- Compression Ratio
- Compressive Strength
- Compressor
- Compressor Fuel
- Compressor Station
- Compressor Stations
- Concentration
- Condensate
- Condenser
- Conditional Demand Analysis
- Conditionally Effective Rates
- Conduction, Thermal
- Conductivity, Thermal
- Conductor, Thermal
- Confined Space
- Confirmed Nomination
- Confiscatory Rates
- Conjunctive Billing
- Consenting Party
- Conservation Program
- Conservation Supply Curve
- Conservation-Energy
- Construction Expenditures
- Construction Work In Progress (CWIP)
- Consumer, Gas
- Consumption
- Content Of Fuel
- Contesting Party
- Continuing Property Record (CPR) Unit
- Contract Area
- Contract Assignment
- Contract Balancing
- Contract Carriage
- Contract Carrier
- Contract Demand (CD)
- Contract Imbalance Quantity
- Contract Pressure
- Contract Quantity Method
- Contract Request
- Contract Storage
- Contract Storage Service
- Contracted Reserves
- Contributions In Aid Of Construction (Non-Refundab
- Control
- Control Gas
- Control Group
- Control, Limit
- Control, Operating
- Control, Primary Safety, Combustion Safeguard
- Control, Safety
- Controls
- Convection
- Convector
- Conventional Gas
- Conversion Burner
- Conversion To Natural Gas
- Conversion Unit
- Convertible Securities
- Cooling Coil
- Cooling Degree Day
- Cooling Tower
- Copper Insert
- Core
- Core Customers
- Correlative Rights
- Corrosion
- Corrosion Fatigue
- Corrosion Mitigation
- Corrosion Prevention
- Corrugated Stainless Steel Tubing (CSST) Piping Sy
- Cost
- Cost Allocation
- Cost Based GIC
- Cost Of Capital
- Cost Of Removal
- Cost Of Service
- Cost Of Service Tariff
- Cost Zones
- Cost, Original
- Cost, Reproduction
- Cost-Effectiveness Test
- Costs, Common
- Costs, Joint
- Council Of Petroleum Accountants Societies (COPAS)
- Coupling
- Cracking
- Cream Skimming
- Creep
- Critical Temperature And Pressure
- Cross Over
- Cross Subsidization
- Crude Oil (Crude, Mineral Oil, Crude Oil, Petroleu
- Cryogen
- Cryogenic
- Crystallinity
- Cubic Foot
- Cubic Foot Metered
- Cubic Foot, Standard
- Cumulative Effects
- Curb Box
- Curb Line
- Curb Stop Or Curb Valve
- Current Adjustment
- Current And Accrued Assets
- Current Gas
- Current Reservoir Capacity
- Curtailment
- Cushion Gas
- Custody Transfer
- Custody Transfer Transaction
- Customer
- Customer Advances For Construction
- Customer Charge
- Customer Costs
- Customer Density
- Customer Imbalance Quantity
- Customer Nomination Method
- Customers, Average Number Of
- Cuttings
- Cycle Billing
- Daily Average Send-Out
- Damper
- Darcy
- Data Request
- Deaerator
- Debentures
- Debt Coverage Principle
- Decommission
- Decontrol
- Dedicated Acreage
- Dedicated Gas Reserves
- Dedicated To Interstate Commerce
- Deep Gas
- Deferred Credits
- Deferred Debits
- Deferred Or Future Income Taxes
- Deficiency Based GIC
- Deficiency Period
- Deflection Temperature
- Degradation
- Degree Day, Cooling
- Degree Day, Heating
- Dehumidify
- Dehydration
- Dekatherm
- Deliverability
- Delivery By Non-Delivery
- Delivery Point
- Demand
- Demand Based GIC
- Demand Charge
- Demand Costs (Rate)
- Demand Day
- Demand Diversity
- Demand Interval
- Demand Load
- Demand Meters
- Demand Side Bidding
- Demand Side Management (DSM)
- Demand Side Resource Portfolio
- Demand Side Resources
- Demand, Average
- Demand, Billing
- Demand, Coincident
- Demand, Contract
- Demand, Integrated
- Demand, Maximum
- Demand, Minimum
- Demand, Non-Coincident
- Demonstration Scale Plant
- Densitometer
- Density
- Density, Bulk
- Department Of Energy (DOE)
- Depletion
- Depletion Allowance
- Depreciable Plant
- Depreciation
- Depreciation Accounting
- Depreciation Expense
- Depreciation Reserve
- Depreciation Reserve Ratio
- Depreciation, Accelerated
- Depreciation, Asset Depreciation Range (ADR)
- Depreciation, Declining Balance
- Depreciation, Flow-Through
- Depreciation, Liberalized
- Depreciation, Normalized
- Depreciation, Straight-Line
- Depreciation, Sum Of The Years Digits (SYD)
- Depreciation, Unit Of Production
- Deregulation
- Deriming
- Derrick
- Desiccant
- Design Day
- Design Day Availability
- Design Day Temperature
- Design Load
- Design Pressure
- Desulfurization
- Detector, Holiday
- Development
- Development Well
- Devonian Shale
- Diaphragm
- Die, Pipe Thread
- Dielectric Constant
- Dielectric Strength
- Differential Pressure
- Diffusion
- Dig-in
- Diluent
- Dimension Ratio
- Direct Heating Equipment
- Direct Installation Program
- Direct Sale
- Direct Vent Appliance
- Direct-Fired
- Directional Drilling
- Disabling Injury Illness Incidence
- Discount On Capital Stock
- Discounted Cash Flow (DCF)
- Discovery
- Dispatchability Of DSM
- Dispatching
- Dispersion
- Displacement
- Dispute Resolution
- Dissolved (Solution) Gas
- Distillate, Natural Gas
- Distribution
- Distribution Company
- Distribution System, Gas
- Distrigas Method
- Diversity
- Diversity Factor
- Diversity, Demand
- Diverter, Down Draft
- Divertible Gas Supplies
- Dividend Appropriations
- Docket
- Docket Number
- Dollar-Years
- Double Block And Bleed System
- Double Glazing
- Double Leverage
- Double-Breasted Buying
- Down Draft (Back Draft)
- Downstream
- Downstream Pipeline
- Draft
- Draft Fan, Forced
- Draft Fan, Induced
- Draft Hood
- Draft Regulator (Draft Stabilizer)
- Draft, Mechanical
- Draft, Natural
- Drill Pipe
- Drilling
- Drilling Mud
- Drip
- Drip Box
- Drip Oil
- Drip Riser Or Drip Stock
- Dry Gas
- Dry Hole
- DSM Costs, Administrative
- DSM Costs, Equipment
- DSM Costs, Marketing
- DSM Costs, Monitoring And Evaluation
- DSM Costs, Non-Utility
- DSM Costs, Participant
- DSM Costs, Planning
- DSM Costs, Utility
- DSM Potential
- Dual Fuel
- Dual-Fuel Capability
- Duct
- Duct System
- Dutchman
- Dye Penetrant Weld Examination
- Earnings/Price Ratio (E/P)
- Easement
- Economic Out
- Economic Potential
- Economic Regulatory Administration (ERA)
- Economic/Market Clauses
- Economizer
- Edge Water
- Edwards Balance
- EEM
- Efficiency
- Elastomer
- Electric Energy
- Electric Heating Pump And Air-Conditioning Efficie
- Electric Log
- Electric Space Heating
- Electric Well Log
- Electrolysis
- Electronic Data Interchange (EDI)
- Electronic Data Transfer
- Electronic Gas Measurement (EGM)
- Electronic Ignition
- Elevated Temperature Testing
- Eligibility Criteria
- Eligible Firm Sales Service Agreement
- Eligible Market
- Ell Or Elbow
- End-Use
- End-Use Metering
- End-User
- Endothermic
- Energy Audit
- Energy Conservation Measure
- Energy Conservation Practice
- Energy Factor
- Energy Information Administration (EIA)
- Energy-Efficiency Program
- Engine, Reciprocating
- Enhanced Oil Recovery (Eor)
- Enhanced Oil Recovery (EOR) Fields
- Enriching
- Entitlement
- Environment
- Environmental Protection Agency (EPA)
- Environmental Stress Cracking (ESC)
- Epoxy Resins
- Equal Rate Treatment
- Equitable Sharing Mechanism
- Equity
- Equity Capital
- Equity Return
- Equivalent Direct Radiation
- Equivalent Length Of Pipe
- Equivalent Of Fuels Burned
- Equivalent Quantities
- Equivalent Volumes
- Escalator Clause
- Established Reserves
- Estimated Bill
- Estimated Proved Recoverable Reserves
- Ethane
- Ethane (C2H6)
- Ethylene (C2H4)
- Eudiometer
- Evaporative Cooling
- Evaporator
- Evergreen Clause
- Ex Parte Communications
- Excess Air
- Exchange Agreement
- Exchange Gas
- Exchange Transactions
- Exhaust Port
- Exit Temperature
- Exothermic
- Expander Cycle
- Expander Turbine
- Expansion Loop
- Expansion Ratio
- Expansion Valve
- Expectancy
- Exploration
- Exploratory Well
- Explosion Head
- Explosive Limits
- Exposures
- Extender
- Extension (of Gas Reserves)
- Exterior Zones
- Externality, Environmental
- Extraction Loss
- Extraction Plant
- Extraordinary Property Losses
- Extrusion
- F&E
- Failure, Adhesive
- Fair
- Fair Value
- Farm Tap
- Farmout
- Favored Nation Clause
- Federal Energy Regulatory Commission (FERC)
- Federal Power Commission
- Feed Points
- Feeder (Main)
- Feedstock
- FERC Out
- FHLMC/Freddie Mac
- Fiber Stress
- Field
- Field And Gathering Lines
- Field Pressure
- Field Price
- Field Sales
- Field Uses
- FIFO
- Filed Rate Doctrine
- Filed Rates
- Filler
- Fin
- Fin-Fan Cooler
- Fire Brick
- Fire Clay
- Fire Point
- Firing Rate
- Firm Service
- Firm Transportation Service (FTS)
- First Come, First Served
- First Hour Rating
- Fish
- Fitting
- Five Light Meter
- Fixed Cost
- Fixed Variable
- Fixed-Variable Method
- Flame
- Flame Detector
- Flame Front
- Flame Geometry
- Flame Test
- Flame Velocity
- Flammable Limits
- Flange
- Flange, Insulated
- Flaring
- Flash Back
- Flash Gas
- Flash Point
- Flex Rates
- Flexible Connector
- Flexible Coupling
- Flexural Strength
- Flow Formulas
- Flow Prover
- Flow Restrictor
- Flow-Through Method
- Flue
- Flue Collar
- Flue Exhauster
- Flue Gas
- Fluidized Bed Combustion
- Fly Ash
- FNMA/Fannie Mae
- Foam Generation
- Foaming
- Force Majeure
- Formation
- Forward Haul
- Fossil Dismantlement
- Fossil Fuel
- FRAC
- Fractionation
- Fracturing
- Fracturing (Or Fracing)
- Franchise Gas
- Franchises And Consents
- Free Driver
- Free Gas Reservoir
- Free Rider
- Free Service
- Fuel And Shrinkage
- Fuel Cell
- Fuel Gas
- Fuel Price Adjustment Clause
- Fuel Substitution
- Full Requirements
- Full Scale Program
- Functional Accounts
- Functionalization
- Fungi Resistance
- Furnace
- Furnace (Condensing)
- Furnace, Downflow
- Furnace, Duct
- Furnace, Forced-Air
- Furnace, Horizontal
- Furnace, Upflow
- Fuse
- Futures Market
- Gas
- Gas Absorption
- Gas Bag
- Gas Balance Report
- Gas Bubble
- Gas Cap
- Gas Central Furnace And Boiler Efficiency Measures
- Gas Conditioning
- Gas Controller
- Gas Cycling
- Gas Day
- Gas Detector
- Gas Generator
- Gas Imbalance
- Gas Impurities
- Gas In Place (GIP)
- Gas Injection
- Gas Inventory Charge (GIC)
- Gas Lift
- Gas Plant
- Gas Processing Plant
- Gas Research Institute (GRI)
- Gas Reservoir
- Gas Sand
- Gas Supply Coordinator
- Gas Transmission Systems
- Gas Transported For Others
- Gas Turbine
- Gas Used
- Gas Well
- Gas Zone
- GAS*FLOW
- Gas, Associated
- Gas, Blast Furnace
- Gas, Casinghead
- Gas, Conventional
- Gas, Dissolved
- Gas, Dry
- Gas, Extraneous
- Gas, Field
- Gas, Flue
- Gas, Foreign
- Gas, Illuminating
- Gas, Liquefied Petroleum (LPG)
- Gas, Manufactured
- Gas, Natural
- Gas, Non-Associated
- Gas, Oil
- Gas, Sour
- Gas, Stack
- Gas, Sweet
- Gas, Synthesis
- Gas, Unconventional
- Gas, Vent
- Gas, Waste
- Gas, Wet
- Gas-Oil Ratio
- Gasification
- Gasoline Plant
- Gate Station
- Gatherer
- Gathering
- Gathering Agreement
- Gathering Line
- Gathering Station
- Gathering System
- Gauge, Pressure
- General Plant
- General System Supply
- Generation, Non-Utility
- Geological Trap
- Geophysical Survey
- Geophysics
- Geopressured Brines
- GIC
- Glycol Dehydrators
- Go-Devil
- Golden Rule
- GOR
- Gouge-Pipe
- Governor, Zero Gas
- GRADE (Gas Revenue Accounting Data Exchange)
- Grandfather Clause
- Gravity Survey
- Greenhouse Effect
- Greenhouse Gases
- Grid
- Grille (Grill)
- Ground Temperature
- Groundbed
- Groundwater
- Guideline Lives
- Gum
- Gun Perforator
- Head
- Head Up
- Header
- Headstation
- Hearing
- Heat Balance
- Heat Capacity
- Heat Exchanger, Direct
- Heat Exchanger, Indirect
- Heat Fusion Joint
- Heat Gain
- Heat Joining
- Heat Liberation Rate
- Heat Loss
- Heat Of Combustion
- Heat Of Fusion
- Heat Of Vaporization, Latent
- Heat Pump
- Heat Transfer
- Heat Transfer Coefficient
- Heat, Latent
- Heat, Sensible
- Heat, Specific
- Heater, Construction
- Heater, Infra-Red Radiant
- Heater, Make-Up Air
- Heater, Room
- Heater, Unit
- Heater, Vented Recessed
- Heating Degree Day
- Heating Season Method
- Heating System, High-Pressure Steam
- Heating System, High-Temperature Water
- Heating System, Hot Water
- Heating System, Low-Pressure Steam
- Heating System, Medium-Temperature Water
- Heating System, Steam
- Heating Value
- Hedging
- Helium (He)
- Henry Hub
- Herfindahl-Hirschman Index (HHI)
- Hexane
- High Btu Gas
- High Btu Oil-Gas Process
- High Fire
- High Pressure Distribution System
- High Sulphur No. 6 Oil
- High Wall
- High-Density Polyethylene
- High-Priority Customers
- High-Priority Use
- Highest Allowed Regulated Rate Clause
- Hinshaw Amendment
- Historical Cost
- Hob
- Holder, Gas
- Hole
- Holiday
- Holiday Detector
- Hoop Stress
- Horizontal Drilling
- Horsepower (hp)
- Horsepower Hour
- Horsepower, Boiler (Bhp)
- Horsepower, Brake (bhp)
- Horsepower, Compressor
- Horsepower, Indicated
- Hot Tap
- Hot Work
- Hourly Peak
- House Riser, Gas
- Hub
- Humidifier
- Humidistat
- Humidity
- Humidity, Relative
- HVAC System
- Hydrafrac
- Hydrate
- Hydrocarbon
- Hydrocarbon, Saturated
- Hydrocarbon, Unsaturated
- Hydrocarbons
- Hydrocracking
- Hydrodesulfurization
- Hydrogasification
- Hydrogen (H2)
- Hydrogen Sulfide (H2S)
- Hydrogen Sulphide (H2s)
- Hydrogenation
- Hydronics
- Hydropyrolysis
- Hydrostatic Design Stress
- Hydrostatic Strength (Quick)
- Hydrostatic Test
- Hygas
- Hygrometer
- Ideal Gas Law
- Ignition Temperature
- Ignition, Automatic
- Ignition, Continuous
- Ignition, Intermittent
- Ignition, Interrupted
- Ignition, Manual
- Illuminants
- Imbalance
- Immersion Length
- Impact Evaluation
- Impact Resistance
- Impact, Izod
- Impact, Tup
- Impermeable
- Impounding Area
- Imputed Capitalization
- In Situ Coal Gasification
- In-line Inspection Tools
- Incentive
- Incentive Or Industrial Sales Programs (ISP)
- Incentive Program
- Incentive Rate Of Return (IROR)
- Inch Of Mercury
- Inch Of Water
- Incineration
- Inclinometer
- Incremental Cost
- Incremental Pricing
- Indefinite Price Clauses
- Independent
- Independent Petroleum Association Of America (IPAA
- Independent Power Producer (IPP)
- Index
- Index, Constant-Pressure Compensating
- Index, Meter
- Index, Temperature Compensating
- Indexing
- Indicator, Demand
- Indicator, Engine
- Indicator, Volume
- Indirect Oven Thermostat System
- Indirect-Fired
- Industrial And Railroad Generating Stations
- Industrial Fuel Switching
- Industrial Service
- Inert
- Infield Exchange Agreement
- Infill Drilling
- Infill Well
- Infiltration
- Infra-Red Radiation
- Inhibitor
- Initial Delivery
- Injectability
- Injected Gas
- Injection Molding
- Injury/Illness Incidence Rate, Disabling
- Injury/Illness, Disabling
- Input Rate
- Input Rating
- Inserts
- Instantaneous Technical Potential
- Instrument Piping
- Insulation (Thermal)
- Intangible Plant
- Integrated Company
- Integrated Gasification Combined Cycle
- Integrated Resource Planning
- Integrating Device
- Integrating Pressure-And-Temperature Instrument
- Integrating Pressure-Instrument
- Interactive Effects
- Interchangeability
- Interconnection, System
- Interest Charged To Construction-Credit
- Interested Parties
- Intergeneration
- Interim Bill
- Interim Relief
- Interior Zones
- Interlock
- Internal Combustion
- Interruptible Service
- Interruptible Transportation Service (ITS)
- Interstate
- Interstate Gas
- Interstate Natural Gas Association Of America (ING
- Intervenor
- Intrastate
- Intrastate Gas
- Inverter
- Investment Tax Credit (ITC)
- Investment Tax Credit Adjustments, Net
- ISO Equation
- Isobutane (C4H10)
- J&R
- Jacket
- Jars
- Jet
- Jetting
- Joint
- Joint Compounds
- Joint Costs
- Joint, Leaded
- Joint, Mechanical
- Joint, Screwed (Threaded Joint)
- Joint, Welded
- Joule-Thomson Effect
- Joule-Thomson Expansion
- Jurisdiction
- Jurisdictional
- Just And Reasonable
- Kansas-Nebraska (KN) Method
- Kelly
- Kerogen
- Kerosene, Also Kerosine
- Key Bed
- Key Seat
- Kicker-Line
- Killing A Well
- Kilowatt (KW)
- Kinetic Energy
- Knockout
- Known Change Adjustments
- Lagging
- Lampblack
- Land
- Land Man
- Landfill
- Landfill Gas
- Landman
- Lap
- Latch-On
- Latent Heat
- Lateral
- Laws, Physical - AMAGAT'S.
- Laws, Physical - AVOGADROS'.
- Laws, Physical - BOYLE'S.
- Laws, Physical - CHARLES'.
- Laws, Physical - DALTON'S.
- Laws, Physical - GRAHAM'S.
- Laws, Physical - IDEAL GAS.
- Laws, Physical - JOULE'S.
- Laws, Physical - JOULE-THOMSON EFFECT.
- Laws, Physical - LEDUC'S (AMAGAT'S).
- Laws, Physical - MARRIOTTE'S.
- Laws, Physical - PASCAL'S.
- Laws, Physical - PERFECT GASES.
- Laws, Physical - RAOULT'S.
- Laying Mains
- Leaching
- Leak Clamp
- Leak Detector
- Leak Limiter
- Leakage Survey
- Lease
- Lease And Plant Fuel
- Lease Condensate
- Lease Hound
- Lease Separator
- Leased Storage
- Leasehold Costs
- Least-Cost Planning
- Length
- Lens
- Life-of-the-Field Contract
- Lifeline Rates
- LIFO
- Lift
- Line Loss
- Line Pack
- Line Pack, Gas Delivered From
- Line Packing
- Line Pipe
- Line Rider
- Linerider
- Liquefaction Of Gases
- Liquefied Natural Gas (LNG)
- Liquefied Petroleum Gas (LPG)
- Liquids, Natural Gas
- Live Oil
- Load
- Load Center
- Load Curve
- Load Density
- Load Dispatching
- Load Diversity
- Load Duration Curve
- Load Factor
- Load Profile
- Load Research
- Load Shape Effects
- Load Water
- Load, Base
- Load, Connected
- Load, Net
- Local Distribution Company (LDC)
- Lock In (Unlock)
- Lock Out (Lock)
- Lock-Up Or Lock-Off
- Locked-In Period
- Lockout Timing
- Log
- Log, Electric
- Logging, Mud Analysis
- Logging, Radioactive
- Logs
- Long-term Burst
- Long-term Hydrostatic Strength
- Longitudinal Seams
- Looping
- Loss Of Load Risk
- Lost Opportunity
- Lost Opportunity Resources
- Lost Revenues
- Louvers
- Low Btu Gas
- Low Pressure Distribution System
- Low Priority Users
- Low Sulphur No. 6 Oil
- Low Water Cut-Off
- Low-impact Seismic
- LP Gas
- LP Gas--Air Mixtures
- LPG
- LTV
- Lubricated Plug Valve
- Lurgi Process
- Main
- Main Extension
- Main System
- Mains, Distribution
- Mains, Field And Gathering
- Mains, Gas
- Mains, Transmission
- Major Natural Gas Company (Pipeline)
- Make Up
- Make-Up Air
- Make-Up Gas
- Make-Up Water
- Mandatory Carriage
- Manhole
- Manifold
- Manometer
- Mantle
- Manufactured Gas
- Marginal Cost
- Market Area
- Market Out
- Market Potential
- Market Requirement
- Market Sensitive Contract
- Market-Based Pricing
- Market-Responsive Pricing
- Marketer
- Marketer (Broker)
- Marketing Affiliate
- Marsh Gas
- Massachusetts Formula
- Materials Transportation Bureau (MTB)
- Maximum Actual Operating Pressure
- Maximum Allowable Operating Pressure
- Maximum Daily Quantity
- Maximum Day Allocation
- Maximum Efficient Rate (MER)
- Maximum Gas In Storage
- Maximum Transportation Rate
- Maximum Working Pressure
- Mcf
- MDQ
- Measuring And Regulating Station
- Mechanical Equivalent Of Heat
- Mechanical Rig
- MEGA-NOPR
- Mercaptans
- Merchant Obligation
- Meter Bar
- Meter Book
- Meter Class
- Meter Cock
- Meter Density
- Meter Index (Meter Register)
- Meter Manifold
- Meter Seal
- Meter Set (Meter Installation)
- Meter Stop
- Meter Swivel
- Meter, Diaphragm
- Meter, Gas
- Meter, Hard Case
- Meter, Orifice
- Meter, Positive Displacement
- Meter, Proportional
- Meter, Rotary Displacement
- Meter, Temperature Compensated
- Meter, Tinned Case
- Meter, Turbine
- Meter, Venturi
- Meter, Wet Test
- Methanation
- Methane
- Methane (CH4)
- Methanogenesis
- Methyl Ethyl Ketone (MEK)
- Midstream
- Migration
- Mile Post Location
- Mill
- Mined Cavern
- Mineral Right
- Mineral Rights
- Minimum Bill Clause (Minimum Charge)
- Minimum Commodity Bill
- Minimum Federal Safety Standard--Part 192
- Minimum Transportation Rate
- Minor Items
- Mixed Gas
- Mixer
- Mixer Face
- Mixture, Lean
- Mixture, Rich
- MMBtu
- MMcf
- Modified Btu Method
- Modified Fixed Variable
- Modified Fixed-Variable (MFV) Method
- Modified Seaboard Method
- Molecular Weight
- Molecular Weight Distribution
- Molecular Weight, Weight Average (Abbreviation Mw)
- Monitor
- Monitoring Regulator
- Monthly Service
- Moody's
- Moody's Bond Ratings
- Moody's Bond Yield (Annual Averages Of Monthly Yie
- Moody's Stock Quality Groups
- Motion Rates
- Moving-Bed Gasifier
- NAECA
- Name Plate Rating
- Naphtha
- Naphtha Stripper
- National Association Of Regulatory Utility Commiss
- National Energy Act Of 1978 (NEA)
- National Energy Board (Neb)
- National Fuel Gas Code
- National Gas Transportation Association (NGTA)
- National Historic Preservation Act (NHPA)
- National Transportation Safety Board (NTSB)
- Native Base Gas
- Native Gas
- Natural Gas
- Natural Gas Act Of 1938
- Natural Gas Condensate
- Natural Gas Design Stress
- Natural Gas Distillate
- Natural Gas Liquids
- Natural Gas Liquids (Ngls)
- Natural Gas Pipeline Safety Act Of 1968 (Amended B
- Natural Gas Reserves
- Natural Gas Shrinkage
- Natural Gas Supply Association (NGSA)
- Natural Gas Vehicle (NGV)
- Natural Gasoline
- Needle, Fixed
- Net Plant
- Net Salvage
- Net-Back Pricing
- Netback Pricing Basis
- Network
- Neutron Log
- New Construction Program
- New Field Discoveries
- New Gas
- NGA
- NGPA
- Nipple
- Nitrogen (N2)
- Nitrogen Purge
- No-Bump Rule (or Flowing Gas No-Bump Rule)
- No-Notice Delivery Service
- Nominal Pipe Size (NPS)
- Nominal Wall Thickness
- Nominated Volume
- Nomination
- Nomination Allocation
- Nominations
- Non-associated Gas
- Non-Core Customers
- Non-Hydrocarbon Gases
- Non-Operating Interest
- Non-Operator
- Non-Participant
- Non-Performance
- Non-renewable Resources
- Noncombustible
- Nondestructive Testing
- Nonfirm Gas
- Nonjurisdictional
- Nonmajor Natural Gas Company
- Nonutility Property
- Normal Recovery Capacity
- Normal Test Pressures
- Normalization, Accounting
- Normalization, Weather
- Notice Of Inquiry (NOI)
- Notice Of Proposed Ruling (NOPR)
- Nozzle, Flame Retaining
- Nylon Plastics
- Oakum
- Observation Well
- Observed-Life Table
- Obsolescence
- Occupational Safety And Health Act (OSHA)
- Odorant
- Off-Peak
- Off-Peak Service
- Office Of Fuels Programs
- Offset Well
- Offshore Block
- Oil Fogging
- Oil Gas
- Oil Gravity
- Oil Parity Clause
- Oil Reforming
- Oil Ring
- Oil Scrubbing
- Oil Shale
- Oil, Heavy
- Oil, Light
- Oil, Live
- Oil, White
- Oil-Gas Parity Pricing
- Oilless Bearing
- Old Gas
- Old Gas Subsidy Cushion
- Olefin Resin
- On-Site Generation
- Open Access
- Open Access Transporter
- Open Pressure
- Open Season
- Open-Flow Test
- Operating Costs
- Operator
- Opportunity Cost
- Optimum Air Supply
- Optional Expedited Certificate
- Order 636
- Order To Show Cause
- Organic Sulfur
- Organic Theory
- Orifice
- Orifice Cap (Hood)
- Orifice Meter
- Orifice Plate
- Orifice Plug
- Orifice Spud
- Original Cost
- Orphan Wells
- Orsat Analysis
- Other Entries (To Utility Plant)
- Other Property And Investments
- Outcrop
- Outdoor Exposure
- Outer Continental Shelf (OCS)
- Oven, Indirect
- Overburden
- Overfire Air
- Overpressuring
- Overrun, Authorized
- Overrun, Unauthorized
- Owner
- Oxygen (O2)
- Oxygen Deficiency
- Pack
- Packers
- Panhandle Formula
- Paper Hearing
- Paraffin
- Parking
- Partial Looping
- Partial Participant
- Participant
- Particulate Matter
- Particulates
- Pay Zone
- Payback Period
- Payout Ratio
- Peak Day
- Peak Day Allocation
- Peak Day Curtailment
- Peak Day Design
- Peak Day Method
- Peak Day Sendout
- Peak Hour
- Peak Load
- Peak Responsibility
- Peak Shaving
- Peaking
- Peat
- Penetration Rate
- Pentane
- Percentage Of Proceeds Sales
- Perfluorocarbon Tracer Technology
- Perforate
- Permanent Set
- Permeability
- Persistence
- Persistence Study
- Petroleum
- Phenolic Resin
- Photosynthesis
- PIDX
- Piezometer
- Pig
- Pile, Sacrificial
- Pilot
- Pilot Program
- Pilot, Continuous
- Pilot, Expanding
- Pilot, Intermittent
- Pilot, Interrupted
- Pipe
- Pipe Coating
- Pipe Tongs
- Pipe, Coated
- Pipe, Direct Burial Plastic
- Pipe, Drill
- Pipeline
- Pipeline Capacity
- Pipeline Condensate
- Pipeline Fuel
- Pipeline Marketing Affiliate
- Pipeline Patrol
- Pipeline Peaking Service
- Pipeline Quality Gas
- Piping
- Piping, Trapped
- Pitot Tube
- Pitting
- Plant Acquisition Adjustments
- Plant Protection Gas
- Plant Thermal Reduction (PTR)
- Plastic Insert
- Plastic Pipe
- Plastic Tubing
- Plastic(s)
- Plasticizer
- Platform-Offshore
- Plenum Chamber (Plenum)
- Plug
- Plug Back
- Point Balancing
- Pollution, Atmospheric
- Polybutylene
- Polyethylene
- Polymer
- Polymerization
- Polyolefin
- Polypropylene
- Polypropylene Plastics
- Polyvinylchloride (PVC)
- Polyvinylchloride (PVC) Plastics
- Pool, Oil Or Gas
- Pooling Point
- Population Density
- Population Density Index, One Mile
- Porosity
- Port
- Positive Displacement Pump
- Postage Stamp Rates
- Posted Field Price
- Pot Life (Working Life)
- Potential
- Potential Energy
- Potential Resources
- Potential, Pipe To Soil
- Power Combustion Furnaces
- Powerplant And Industrial Fuel Use Act Of 1978 (PI
- Pre Tax Return
- Precipitator
- Preferred Stock Dividends Or Preferred Dividend
- Preferred Stock Or Preferred Capital Stock - 331
- Pregranted Abandonment
- Preliminary Determination
- Premium On Capital Stock
- Prepayments
- Presiding Administrative Law Judge (PALJ)
- Pressure
- Pressure And Temperature Relief Valve
- Pressure Base
- Pressure Control
- Pressure Differential
- Pressure Drop
- Pressure Gauge
- Pressure Limiting Station
- Pressure Loader
- Pressure Losses
- Pressure Rating
- Pressure Regulating Station
- Pressure Regulator
- Pressure Relief Station
- Pressure, Absolute (PSIA)
- Pressure, Atmospheric
- Pressure, Boiler
- Pressure, Bottom Hole
- Pressure, Critical
- Pressure, Field
- Pressure, Gauge (PSIG)
- Pressure, Maximum Actual Operating
- Pressure, Maximum Allowable Operating
- Pressure, Open
- Pressure, Standard Service
- Pressure, Static
- Pressure, Suction
- Pressure, Total
- Pressure, Trap
- Pressure, Velocity
- Pressure, Working
- Pressure-Decline-Curve Method
- Preventive Maintenance
- Price Ceiling
- Price Earnings Ratio
- Price Elasticity Of Demand
- Primary Air
- Prime Mover
- Priming
- Prior Period Correction
- Priorities Of Service
- Priority
- Pro Forma
- Pro Rata Allocation
- Probable Life
- Probable Reserves
- Process Gas
- Processing Plant
- Processor
- Producer
- Producer Contracted Reserves
- Producer Gas (Also Manufactured Gas)
- Producing Sand
- Producing Zone
- Production
- Project Financing
- Propane
- Propane (C3H8)
- Proper And Adequate
- Property Retired
- Proppant
- Proprietary Capital
- Proration
- Prospect
- Proved Reserves
- Proven Acreage
- Proven Reserves
- Prover
- Prover, Bell
- Prover, Critical-Flow
- Prover, Low Pressure Flow
- Prover, Piston
- Prover, Transfer
- Provisions For Deferred Income Taxes
- Psi
- Psychometric
- Psychrometer
- Public Consultation
- Public Convenience And Necessity
- Public Interest
- Public Utility
- Public Utility Regulatory Policies Act Of 1978 (PU
- Pulse Combustion
- Pumpkin
- Purchase Deficiency Methodology
- Purchased Gas Adjustment (PGA)
- Purchased Gas Adjustment Clause
- Purchaser
- Pure Volumetric
- Purge
- Purge Cycle
- Purging
- Purification
- PURPA
- PVR
- Pyrite
- Pyrolysis
- Pyrometer
- Quad
- Qualification Test
- Quick Burst
