If have 1000 SCF of a natural gas, it is based on the natural gas at standard conditions of 60вЏ and 14.7 psia вЂ“ even if the actual temperature and pressure of the gas produced was higher. If gas units are in psig, then to obtain psia, add 14.7 to the gauge pressure to get the absolute pressure (psia).ДЇor oilfield operations, natural gas at standard conditions normally refers to gas volumes measured at: psig = pounds per square inch gauge 0 psig = 14.7 psia (most common units for gas pressure in oilfield).If you are going to communicate effectively with field operations, then you need to be able to convert between pounds (lbs) of gas (weight) to SCF of gas (volume) and also from SCF to lbs.Д«elow is some more useful information to help you do the conversions. pounds or tons) of the gas emitted to the atmosphere. Air quality regulations customarily express limits based on the mass amount (e.g. Oil company field operations and engineering departments think in terms of the volume of gas since the volume produced will be normally be reported as standard cubic feet (SCF) at 60вЏ and 14.7psia (see Reference 1 below). Typically, for air quality regulatory calculations for natural gas and its components, an ideal gas is assumed and compressibility factors ( Z-factors) are not used.

379.3 SCF at standard conditions of 60вЏ and 14.7psia (see Reference 1). The ideal gas law conversion factor used above is based on the relationship of 1 lb-mole of an ideal gas occupies approx. total gas in SCF = (lbs natural gas)*(379.3 SCF/lb-mole)Г·(MW of gas in lbs/lb-mole) Standard cubic feet (SCF) at 60вЏ and 14.7psiaД®quation 1: Weight in lbs of total gas = (SCF)*(1 lb-mole/379.3 SCF)*(MW of gas in lbs/lb-mole)Д®quation 2: Weight in tons of total gas = (lbs of natural gas)(1 ton/2000 lbs)Д¬onverting from pounds (lbs) of natural gas to volume of natural gas in SCFД®quation 3: Vol. Converting from volume of natural gas to pounds (lbs) of natural gas in SCF Below is a sample calculation with equations to use. Below are some equations to use with a more detailed explanation later in this blog topic.Д¬onversion of natural gas volume to weight (mass) requires the volume of gas in standard cubic feet and the molecular weight of the natural gas. People often ask how do convert a volume (e.g., standard cubic feet) of natural gas to pounds (mass) and pounds of natural gas to volume.

Gas volume calculator