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sector:energy:fugitive:gas:start [2022/03/08 08:41] – [Table] boettchersector:energy:fugitive:gas:start [2022/03/08 08:43] – [Table] boettcher
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 In pipeline inspection and cleaning, tools known as pipeline inspection gauges ("pigs") are used. In a pipeline system, a pig moves, driven by the gas flow, from a launching station to a receiving station (pig trap). Systems for launching and catching pigs can be either fixed or portable. Small quantities of methane are emitted in both insertion and removal of pigs. In addition, pig traps can develop leaks. Normally, however, such traps are regularly monitored for leaks and repaired as necessary. Not all types of pipelines can be pigged; diameter reductions, isolation valves, bends, etc. in pipelines can block pigs. These emissions have been estimated in the framework of a study carried out by the firm of DBI Gas- und Umwelttechnik GmbH [(GROSSE2019)]. In pipeline inspection and cleaning, tools known as pipeline inspection gauges ("pigs") are used. In a pipeline system, a pig moves, driven by the gas flow, from a launching station to a receiving station (pig trap). Systems for launching and catching pigs can be either fixed or portable. Small quantities of methane are emitted in both insertion and removal of pigs. In addition, pig traps can develop leaks. Normally, however, such traps are regularly monitored for leaks and repaired as necessary. Not all types of pipelines can be pigged; diameter reductions, isolation valves, bends, etc. in pipelines can block pigs. These emissions have been estimated in the framework of a study carried out by the firm of DBI Gas- und Umwelttechnik GmbH [(GROSSE2019)].
  
-^                                   ^  Unit        ^  1990    ^  1995    ^  2000    ^  2005    ^  2010    ^  2015    ^  2018    ^  2019    ^ +^                                   ^  Unit        ^  1990    ^  1995    ^  2000    ^  2005    ^  2010    ^  2015    ^  2019    ^  2020    ^ 
-| Length of transmission pipelines  |  km          |  22,696  |  28,671  |  32,214  |  34,086  |  35,503  |  34,270  |  34,996  |  34,476  | +| Length of transmission pipelines  |  km          |  22,696  |  28,671  |  32,214  |  34,086  |  35,503  |  34,270  |  34,476  |  33,809  | 
-| Cavern reservoirs                 |  Billion m³  |  2.8     |  4.8     |  6.1     |  6.8     |  9.2     |  14.3    |  12.4    |  15.3    | +| Cavern reservoirs                 |  Billion m³  |  2.8     |  4.8     |  6.1     |  6.8     |  9.2     |  14.3    |  15.3    |  15.0    | 
-| Porous-rock reservoirs            |  Billion m³  |  5.2     |  8.5     |  12.5    |  12.4    |  12.1    |  9.8     |  9.1     |  8.6     |+| Porous-rock reservoirs            |  Billion m³  |  5.2     |  8.5     |  12.5    |  12.4    |  12.1    |  9.8     |  8.6     |  8.6     |
  
 Most of the gas extracted in Germany is moved via pipelines from gas fields and their pumping stations (either on land or off the coast). Imported gas is also transported mainly via pipelines. Most of the gas extracted in Germany is moved via pipelines from gas fields and their pumping stations (either on land or off the coast). Imported gas is also transported mainly via pipelines.