Patent ID: 7597008

Claim:
A method, comprising: measuring a density of a material flowing through a Coriolis flow meter ( 602 ); determining a pressure of the flowing material from the measured density by following the steps of: (a) setting a value of compressibility z to 1 in the equation P = ρ * R * T * z M and calculating a value for a pressure P ( 604 ) where T is the temperature, M is a molar weight of the material flowing in the Coriolis flow meter, ρ is the density, and R is a constant; (b) using the calculated value of the pressure P to determine a new more accurate value for the compressibility z ( 606 ); (c) using the new more accurate value for the compressibility z to recalculate a value for the pressure P ( 608 ); (d) repeating steps (b) and (c) until the value for the pressure has converged to within a predefined limit.