CATS terminal site. NGLs from the deethanizer goes successively to a depropanizer and debutanizer which produce Propane and Butane and natural gasoline. The petroleum products are then transferred by pipeline either to liquid storage or to other petrochemical businesses based on Teesside for use as feedstock. Gas processing (SNS) The Southern North Sea pipeline reception and gas treatment facilities include the following. A pig receiver and slug catcher. Vapour from the slug catcher is cooled and chilled in a gas-to-gas heat exchanger, then by a refrigerant system, and a Joule-Thomson pressure reduction valve before the, now two-phase, mixture passes to a separator. Gas is warmed in the gas-to-gas exchanger and flows through a filter and flow meter and is routed to the National Transmission System. Liquid from the cold separator is routed to a condensate separator which separates the liquid into monoethylene glycol MEG, which passes to the rich MEG storage tank, and condensate which flows to the 1st stage condensate separator which also receives liquids from the slug catcher. Gas from the 1st stage separator passes to the flash gas compressor, MEG is routed to the rich MEG tank, and condensate is heated and flows to the 2nd stage condensate separator. Gas from the 2nd stage separator passes to the flash gas compressor, and liquid is pumped through a mercury removal bed to the condensate surge drum. MEG from the rich MEG storage tank is routed though the MEG regeneration plant where water is stripped out. MEG flows to the lean MEG storage tank from where it is pumped to the Breagh Alpha platform via a 3-inch pipeline piggybacked with the 20-inch gas line. The NGLs from all the plants are transported by pipeline to petrochemical companies in the Teesmouth area. Condensate is pumped to Sabic for use as a feedstock or to a tanker loading facility. The propane and butane goes to the Phillips Norsea plant, and the condensate goes to Sabic North Tees on the former ICI site at Wilton and to the Tees Storage site owned by Vopak in Seal Sands. See also Everest gas field List of oil and gas fields in the North Sea Eastern Trough Area Project Teesside oil terminal References External links Central Area Transmission System CATS at BP (PDF) CATS pipeline (BG Group website) BP buildings and structures North Sea energy Natural gas pipelines in the United Kingdom Natural gas terminals