The Oil, Gas & Chemicals unit designs and builds liquefied natural gas (LNG), oil, pipeline, petrochemicals, natural gas, and water treatment facilities.[66][145][146][147] Since the company's founding, it has built approximately 50,000 miles (80,000 km) of pipeline systems, more than 50 major oil and gas field developments, and completed over 380 major chemical and petrochemical projects.[5] The unit also constructs and tests tanks for LNG storage.[148] Bechtel has built a third of the world's LNG liquefaction capacity.[149]