Trans-Siberian Pipeline

Urengoy–Pomary–Uzhgorod pipeline
A Soviet stamp of 1983, dedicated to the Urengoy-Uzhgorod transcontinental export pipeline
Location
Country	Russia, Ukraine
General direction	north-south-west
From	Urengoy gas field
Passes through	Izhevsk, Yelets, Kursk, Romny, Zhmerynka, Bohorodchany, Ivano-Frankivsk
To	Uzhgorod
Runs alongside	Progress pipeline, Soyuz pipeline, Bratstvo pipeline
General information
Type	natural gas
Operator	Gazprom UkrTransGaz
Commissioned	1984
Technical information
Length	4,500 km (2,800 mi)
Maximum discharge	32×10^9 m3 (1.1×10^12 cu ft) per year

The Urengoy–Pomary–Uzhgorod pipeline (also known as the West-Siberian Pipeline, or Trans-Siberian Pipeline) is one of Russia's main natural gas export pipelines, partially owned and operated by Ukraine.

The pipeline project was proposed in 1978 as an export pipeline from Yamburg gas field, but was later changed to the pipeline from Urengoy field, which was already in use. In July 1981, a consortium of German banks, led by Deutsche Bank, and the AKA Ausfuhrkredit GmbH agreed to provide 3.4 billion Deutsche Mark in credits for the compressor stations. Later finance agreements were negotiated with a group of French banks and the Japan Export-Import Bank (JEXIM). In 1981-1982, contracts were signed with compressors and pipes suppliers Creusot-Loire, John Brown Engineering, Nuovo Pignone, AEG-Telefunken, Mannesmann, Dresser Industries, and Japan Steel Works. Pipe-layers were bought from Caterpillar Inc. and Komatsu.

The pipeline was constructed in 1982-1984. It complemented the transcontinental gas transportation system Western Siberia-Western Europe which existed since 1973. The official inauguration ceremony took place in France.

On 19 July 2011, UkrTransGaz started modernization of the pipeline.

The pipeline runs from Siberia's Urengoy gas field through compressor plant in Pomar, Mari El to Uzhgorod in Western Ukraine. From there, the natural gas is transported to Central and Western European countries. Together with Soyuz and Progres pipelines it forms the western transit corridor in Ukraine. It crosses the Russian–Ukrainian border north of Sumy. In Ukraine, it takes gas to the Uzhgorod pumping station on the Ukrainian border with Slovakia and to smaller pumping stations on the Hungarian and Romanian borders. The pipeline crossed the Ural Carpathian mountains and more than 600 rivers including Ob, Volga, Don and Dnepr rivers.