Science & Technology
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Optimize Glycol Circulation
During the glycol regeneration process, absorbed methane is vented at a rate directly proportional to the glycol circulation. Optimization of glycol circulation rates can reduce methane emissions at negligible cost.
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Pipeline Pig Launching and Receiving
Pipeline pigging is the practice of cleaning and/or inspecting pipelines. During pigging operations, the pig is inserted into the pipeline and is forced through by pipeline pressure or by using compressed gas.
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Reciprocating Compressors
A reciprocating compressor is used to increase the pressure of natural gas in pipelines. Reciprocating compressors vent natural gas from piston rod packing systems during normal operation.
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How to Activate
The Advisory Team provides guidance on protection actions during an radiological emergency. The A-Team is activated through the EPA Emergency Operations Center.
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Managing the Quality of Environmental Data at EPA Region 7
Information from Region 7 about managing the quality of environmental information
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Methane Challenge Continuous Improvement - Equipment Leaks
Presentation from the April 2020 Methane Challenge webinar.
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Natural Gas STAR Partner Update Newsletters
Past issues of the Natural Gas STAR Program Partner Update newsletters.
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Natural Gas STAR Program Historical Accomplishments
This page provides historical accomplishments reports for the Natural Gas STAR Program.
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Liquids Unloading
Accumulation of liquids (i.e., water and hydrocarbons) in a mature gas well can slow down gas production. To increase gas production, the liquids must be cleared from the well. Removing the liquids is commonly referred to as “liquids unloading.”
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Pneumatic Controllers
Natural gas-powered pneumatic controllers are used in the natural gas industry to operate valves that control liquid level, pressure, and other processes. Some controllers are designed to bleed continuously, while others may bleed gas only when actuated.
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Pipeline Blowdowns
Pipeline blowdowns are routine operations on transmission and distribution systems to allow operators to safely perform maintenance. This practice involves isolating and depressurizing a section of the pipeline and venting the gas to the atmosphere.
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Reroute Glycol Skimmer Gas
Some glycol dehydrators use condensate separators to recover natural gas liquids and the non-condensable gas (or skimmer gas) is often vented to the atmosphere. Rerouting the skimmer gas to the reboiler firetubes can reduce emissions.
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Route Blowdown Gas to Low Pressure System
Rerouting blowdown gas (from stations, equipment, or pipelines) to an existing low-pressure gas system can reduce the amount of high-pressure natural gas that would otherwise be emitted to the atmosphere.
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Centrifugal Compressors
A centrifugal compressor is used to increase the pressure of natural gas in pipelines. Centrifugal compressors contain rotating shafts that require seals to prevent the high-pressure natural gas from escaping the compressor casing.
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CRP - ID Hold Fitment While Turning
ASTM Type Index
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CRP - XIA Squeeze Two Specific Points Simultaneously
child resistant packaging
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CRP - IXG (1) Push Tab Down, Rotate Valve Counterclockwise
child resistant packaging
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CRP - IM Localized Push In While Turning, Force Must Be Applied To Designated Place On Closure
child resistant packaging
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CRP - IVC Requires Tool
child resistant packaging
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CRP - IXB (1) Press down on a Point to Release Lock
child resistant packaging