Dry gas is a natural combustible hydrocarbon methane dominated gas, with relatively low ethane content and low content of heavy hydrocarbons. The gases classified as dry are associated gases of oil deposits (petroleum gases) that have undergone oxidation. Under field conditions they are obtained by natural gas purification from heavy hydrocarbons, water vapor, hydrogen sulfide and mechanical impurities at gas processing facilities and gas processing plants. Dry gas pumped into gas trunklines must contain no more than 20 grams per cubic meter of hydrogen sulfide and its relative humidity must not exceed 60 to 75 per cent.