on Tees) on the North Sea coast, and occupies a 29-hectare site. It is situated in the middle of Teesmouth's petrochemical area, between an oil terminal to the north, and a chemical works and the former Teesside Oil Refinery (to the south). The facility processes the gas through processing trains that ensure that its quality meets the requirements for entry to the National Transmission System (NTS). Natural Gas Liquids (NGLs) are removed and the processed natural gas is fiscally metered before leaving the terminal and being fed directly into the NTS. The NGLs are then separated into propane, butane and condensate. In 2018, CATS delivered over 5 billion cubic metres of gas to UK markets, representing approximately 14% of UK gas production and 7% of demand. Gas processing The CATS gas terminal has the capacity to process about 34 million standard cubic metres of natural gas a day in two parallel processing trains. The pipeline reception and gas treatment facilities comprise: Inlet reception – pig receiver, slug catcher and filter. From the inlet reception fluids flow to the CATS or to the TGPP terminal. Gas treating – mercury removal and hydrogen sulphide H2S/mercury treaters Dewpoint control units – Joule-Thomson valve chilling then into separator vessel, gas is metered prior to export, liquid passes through a H2S removal vessel prior to metering and export Gas dehydration (2 trains) – counter current contact with tri-ethylene glycol (TEG) facility which includes a TEG cold finger regeneration system Cold separation – dehydrated gas undergoes Joule-Thomson valve cooling then flows to a low temperature separator, gas from the separator is heated and metered prior to export to the National Transmission System (NTS), liquid from the separator passes to the stabiliser column Stabilization and compression – stabilizer overhead vapour (methane and ethane) is compressed and is routed to NTS, liquid from the stabilizer flows to the depropanizer Fractionation – depropanizer overhead vapour (propane) is cooled, passes through a H2S removal vessel, and is metered prior to sale as propane, the bottom product from the depropanizer is routed to the debutanizer, overhead product from the debutanizer (butane) is cooled, metered and sold as butane, bottom product from the debutanizer is cooled, metered and sold as natural gas liquids (NGL). The propane and butane are produced to the following specification. Propane and butane are supplied to Norsea. Gasoline (C5+) is supplied to Navigator and Sabic. Distribution The purified