The FLAGS pipeline is a natural gas pipeline in the North Sea

North Sea

In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively...

 which is used to transport liquids and associated gas from the following fields

Oil field

An oil field is a region with an abundance of oil wells extracting petroleum from below ground. Because the oil reservoirs typically extend over a large area, possibly several hundred kilometres across, full exploitation entails multiple wells scattered across the area...

:

• Cormorant A
  Cormorant oilfield
  The Cormorant oilfield is located north east of Lerwick, Shetland, Scotland, in block number 211/26a. It was discovered in September 1972 at a depth of . Estimated recovery is of oil. The oil reservoir is located at a depth of .-Ownership:...
  
  
• North Cormorant
  Cormorant oilfield
  The Cormorant oilfield is located north east of Lerwick, Shetland, Scotland, in block number 211/26a. It was discovered in September 1972 at a depth of . Estimated recovery is of oil. The oil reservoir is located at a depth of .-Ownership:...
  
  
• North West Hutton
• Ninian Central
• Ninian North & South
• Brent
  Brent oilfield
  The Brent field is an oil field located in the East Shetland Basin north-east of Lerwick, Shetland Islands, Scotland at the water depth of . The field operated by Shell UK Limited was once one of the most productive parts of the UK's offshore assets but is now nearing the end of its useful...
  
   'A', 'B', 'C' and 'D'
• Tern
  Tern oilfield
  The Tern oilfield is an oilfield situated north east of Lerwick, Shetland Islands, Scotland, in block numbers 210/25a.-History:The Tern field was discovered in April 1975 in a water depth of . It started production in 1989. Until July 2008, the oilfield was operated by Royal Dutch Shell and...
  
  
• Magnus
  Magnus oilfield
  The Magnus oilfield is a large oilfield in the United Kingdom's zone of North Sea. It is located north-east of the Shetland Islands. The field is located mainly in Block 211/12a. Resources are estimated to total of oil, of which are recoverable reserves....
  
  
• Thistle
• Murchison
• Statfjord
  Statfjord oil field
  The Statfjord oil field is an enormous oil and gas field in the Norwegian sector of the North Sea operated by Statoil.It is a trans-median field crossing the Norwegian and UK North Sea Boundary with approximately 15% being in the UK Continental Shelf waters. At peak production it produced over of...
  
  
• Heather
• Gjøa
  Gjøa oilfield
  Gjøa oilfield is an oilfield in the Norwegian section of the North Sea. It lies about off the Troll field.The Gjøa reserves are estimated to be about 40 billion cubic metres of natural gas and of oil and condensate....
  
  

The pipeline is a 36 inches (914.4 mm) steel pipe to API 5L, X60 specification and is 450.6 kilometres (280 mi) long. It starts at Brent 'A' and terminates at St. Fergus

St. Fergus

St Fergus is a village in Aberdeenshire, Scotland, formerly in the county of Banffshire. St Fergus lies a mile from the North Sea coast and three miles northwest of Peterhead...

 near Peterhead

Peterhead

Peterhead is a town in Aberdeenshire, Scotland. It is Aberdeenshire's biggest settlement , with a population of 17,947 at the 2001 Census and estimated to have fallen to 17,330 by 2006....

 in Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. Pipe laying was completed in April 1978 and finally commissioned in May 1982.

At Brent A, the pipeline is connected with the Northern Leg and Western Leg transmission systems, carrying gas from a number of nearby fields. Natural gas from the Norwegian Statfjord field is fed through the Tampen pipeline, linking Norwegian and UK gas trunkline networks.