![]() ![]() The definition of STP - Standard Temperature and Pressure and NTP - Normal Temperature and Pressure. ![]() STP - Standard Temperature and Pressure and NTP - Normal Temperature and Pressure Temperature - Imperial Unitsĭensity and specific volume of dry air and water vapor at temperatures ranging 225 to 900 degF (107 to 482 degC). Dry Air and Water Vapor - Density and Specific Volume vs. Thermodynamic properties of dry air - specific heat, ratio of specific heats, dynamic viscosity, thermal conductivity, Prandtl number, density and kinematic viscosity at temperatures ranging 175 - 1900 K. Dry Air - Thermodynamic and Physical Properties Barometer - Altitude CompensationĮlevation compensating manometer. Elevation above Sea LevelĮlevation above sea level - in feet and meter - with barometric and atmospheric pressure - inches mercury, psia, kg/cm 2 and kPa. AltitudeĮlevation above sea level and air temperature, pressure and density. Air Temperature, Pressure and Density vs. temperature correction factor compared to Normal Air Conditions. Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more. Online calculator, figures and tables showing density, specific weight and thermal expansion coefficients of air at temperatures ranging -100 to 1600 ☌ (-140 to 2900 ☏) at atmospheric and higher pressure - Imperial and SI Units. Air - Density, Specific Weight and Thermal Expansion Coefficient vs. Pressure and TemperaturesĪir density at pressure ranging 1 to 10 000 bara (14.5 - 145000 psi) and constant selected temperatures. Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more. Material properties of gases, fluids and solids - densities, specific heats, viscosities and more. ![]() Īir, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves. Involving velocity, pressure, density and temperature as functions of space and time. Moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content. Ρ ref = density reference at elevation 0 ft and temperature 70 oF - (0.075 lb m/ft 3)į = correction factor from the chart above Example - Density at Elevation 4000 ft and Temperature 300 oFįrom the chart above - at elevation 4000 ft and temperature 300 oF the correction factor is approximate 1.7. Ρ = density at the given temperature and elevation (lb m/ft 3) The density at a given temperature and elevation can then be calculated as The chart above can be used to estimate " temperature vs. The specific volume of standard air at a certain altitude can be calculated by multiplying with the volume correction factor below Note! - other definitions of STP and NTP are widely used.
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