PT rating interpolation calculation is approximate linear interpolation calculation from two known pressures and temperatures to calculate the value between two points.Īpproximate linear interpolation calculation is based on assumption of linear change between two known pressures and temperatures. Also, different materials used will have different values. Generally, the higher the temperature, the lower the pressure allowed for use. PT rating is pressure-temperature criteria, which expresses the relationship between fluid temperature and its allowable pressure. PT Rating Interpolation Calculation ■What is PT Rating Interpolation Calculation? Open description There may be differences with the actual fluid. ※ Since it is converted as an ideal gas, there may be a difference with the actual fluid.KITZ will not responsible for any problems that may arise as a result of the calculation. ※ Due to the relationship between the significant digits, accurate values are not guaranteed.Therefore, for gases, normal flow rate based on atmospheric pressure and temperature of 0☌ is often used.Īctual flow rate, which is actual temperature and pressure used, and unit conversions between normal flow rate above are tend to be relatively common. With the case in gases, it is slightly more complicated due their volume changes in temperature and pressure. The concept differs slightly between liquid flow rate unit conversion and gas flow rate unit conversion. Kinematic Viscosity = Viscosity / Density ![]() Kinematic viscosity is viscosity divided by density. Viscosity and kinematic viscosity have the following relationship. In addition to unit conversion in viscosity and unit conversion in kinematic viscosity, unit conversion is also performed between viscosity and kinematic viscosity. Viscosity and kinematic viscosity represents different matters. Among these, unit conversion is performed between absolute temperature based on absolute zero degrees and the temperature in degrees Celsius used in everyday life.Ībsolute temperature and temperature in degrees Celsius have the following relationship.Ībsolute Temperature = Celsius Temperature + 273.15 The relationship exists between absolute pressure and gauge pressure as below.Ībsolute Pressure = Gauge Pressure + Atmospheric Pressure With pressure unit conversions, unit conversion between absolute pressure based on absolute vacuum and gauge pressure based on atmospheric pressure tends to be relatively common.
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