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Million standard cubic feet per day is a unit of measurement for gases that is predominantly used in the United States. It is frequently abbreviated MMSCFD, where "MM" means million (Roman numeral M = 1,000 so MM = 1,000,000). MMSCFD is commonly used as a measure of natural gas, liquefied petroleum gas (LPG), compressed natural gas (CNG) and other gases that extracted, processed or transported in high quantities.
A related measure is Mega standard cubic metres per day (MSm3/d), which equals to 103 MMSm3/d used in many countries outside the United States. One MMSCFD equals 1180 Sm3/h.
When converting to mass flowrate, the density of the gas should be used at Standard temperature and pressure.
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