# Weymouth equation pdf

Be able to use the Weymouth equation to calculate gas flow rate through a pipe with known diameter and length, elevation difference between pipeline inlet and outlet, specified inlet and outlet pressure and enough information to calculate gas properties. Be able to use the Panhandle A equation to calculate gas flow rate. In Imperial units, the Weymouth equation is. Tsc and Psc are the temperature and pressure at standard conditions, in absolute Fahrenheit. Tm is the average temperature of the gas line, in absolute Fahrenheit. P1 and P2 are the pressures at the pipe entrance and exit, in absolute psi. L is the length of the pipe, in miles. PDF | Direct calculations of unsteady- state Weymouth equations for gas volumetric flow rate occur more frequently in the design and operation analysis. | Find, read and cite all the research you. Weymouth Equation ( flow with elevation change) LT Z f P e P d P T q 3.

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## Equation weymouth

s 1 s s s where q = Gas flow rate ( Mcfd) at temperature s T and pressure s P s T = Base temperature ( ºR) s P = Base pressure ( psia) s P = Upstream pressure ( psia) 1 P = Downstream pressure ( psia) 2 s = T Z 0. 0375 h h = Change in elevation ( outlet minus inlet) ( ft). and if the Moody friction factor for Weymouth equation is. 032 f D ( 3) All these friction factors below will be substituted into Equations ( 1) and ( 2) respectively to calculate the in- stantaneous volumetric gas flow rate in horizontal and inclined pipes. Panhandle A Equation. The Panhandle A pipeline flow equation assumes that. In this work, the developed model equations in [ 11] will be applied to other friction factor equations producing different flow rate from the unsteady- state Weymouth equations. Use of fundamental equation for calculating flow requires the numerical evaluation of friction factor. These equations have generally been published in the English system of units. Where appropriate, the alternate equations in metric units have been included, with the names of the metric units being shown in italic type. Since the Pole, Spitzglass, and Weymouth equations are included only for historical interest,