After being extracted, natural gas is piped to refineries for the removal of unwanted chemicals, such as carbon dioxide, hydrogen sulfide, and sulfur dioxide, as well as water vapor, which can corrode pipelines.
Setelah dikeluarkan, gas alam dialirkan melalui pipa ke pabrik pemurnian untuk menyingkirkan zat kimia yang tidak diinginkan, seperti karbon dioksida, hidrogen sulfida, dan sulfur dioksida, serta uap air, yang dapat membuat pipa berkarat.