Longest Pipelines Length Comparison (KM Operational)
Compare the 10 longest pipelines by operational length, from West-East Gas at 8,704 km to Trans-Alaska at 1,287 scale. Lengths in km with operator specs listed.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| West-East Gas Pipeline Longest pipeline in the world. | 8,704 kilometers | Xinjiang to Shanghai, China, gas | PetroChina West-East spec: 8,704 km operational |
| West-East Gas II 4 under West-East I. | 8,700 kilometers | Xinjiang to Guangdong, China, gas | PetroChina West-East II spec: 8,700 km operational |
| ESPO Pipeline 3,843 under West-East II. | 4,857 kilometers | East Siberia to Pacific, Russia, oil | Transneft ESPO spec: 4,857 km operational |
| Keystone Pipeline System Longest in North America here. | 4,340 kilometers | Canada to USA, oil system total | TC Energy Keystone spec: 4,340 km system total |
| Yamal-Europe Pipeline 233 under Keystone. | 4,107 kilometers | Siberia to Germany, gas | Gazprom Yamal-Europe spec: 4,107 km operational |
| Druzhba Pipeline 107 under Yamal-Europe. | 4,000 kilometers | Russia to Central Europe, oil | Transneft Druzhba spec: 4,000 km operational |
| Kazakhstan-China Oil Pipeline 1,200 under Druzhba. | 2,800 kilometers | Caspian to Xinjiang, oil | KazMunayGas spec: 2,800 km operational |
| Trans-Mediterranean Pipeline Subsea anchor. | 2,475 kilometers | Algeria to Italy, gas, kept for scale | Transmed operator spec: 2,475 km operational |
| Baku-Tbilisi-Ceyhan Pipeline Caspian export anchor. | 1,776 kilometers | Azerbaijan to Turkey, oil | BTC operator spec: 1,776 km operational |
| Trans-Alaska Pipeline Smallest row here. | 1,287 kilometers | Prudhoe Bay to Valdez, oil | Alyeska Trans-Alaska spec: 1,287 km operational |
About this converter
West-East Gas runs 8,704 km in China, 4 clear of West-East II at 8,700. ESPO at 4,857, Keystone system at 4,340, Yamal-Europe at 4,107, Druzhba at 4,000, Kazakhstan-China at 2,800, Trans-Mediterranean at 2,475 for scale, BTC at 1,776 and Trans-Alaska at 1,287 follow. Lengths count operational mainline km per operators. Abandoned spurs stay out. Gas versus oil splits rows since products differ. That product split is noted per row.
How to use it
Pick two pipelines and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try West-East against Trans-Alaska to see the near seven times gap. The bars below scale to West-East so Trans-Alaska looks thin next to it. Switch the unit to miles for US figures. Ratios are exact divisions of the operational lengths.
Kazakhstan-China at 2,800 ranks above Trans-Mediterranean at 2,475 in true order here. System totals like Keystone 4,340 count branches per operator. Figures follow PetroChina, Transneft, Gazprom, TC Energy and Alyeska specs. New loops add km yearly.
FAQ
What is the longest pipeline?
West-East Gas at 8,704 km in China. West-East II follows at 8,700.
How long is Keystone?
4,340 km system total. Longest in North America here.
Do spurs count?
System totals count branches per operator. Abandoned spurs stay out.
Why list Trans-Mediterranean?
For scale at 2,475 km. Subsea anchor from Algeria to Italy.
Sources
- Operator specs operational mainline: West-East Gas PetroChina 8,704; West-East II 8,700; ESPO Transneft 4,857; Keystone TC Energy 4,340 system; Yamal-Europe Gazprom 4,107; Druzhba Transneft 4,000; Kazakhstan-China 2,800; Trans-Mediterranean 2,475 scale; BTC 1,776; Trans-Alaska Alyeska 1,287 km
Last verified: 2026-10-09 · 10 entries
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