Several different equations have been proposed and are in use for natural gas pipeline flow calculations. This course provides information about four of them, the Weymouth Equation, the Panhandle A Equation, the Panhandle B Equation, and the Darcy Weisbach Equation, along with information about the fluid properties needed and their estimation or calculation. Topics: At the conclusion of this course, the student will: Be familiar with the natural gas properties, density, specific gravity, molecular weight, compressibility factor, and viscosity, and their use in pipeline flow calculations. Be able to calculate the compressibility factor for natural gas with specified average gas pressure and temperature and known specific gravity. Be able to calculate the viscosity of natural gas with specified average gas pressure and temperature and known specific gravity. Be able to obtain a value for the friction factor using the Moody diagram for given Re and /D. Be able to calculate a value for the friction factor for specified Re and /D, using the appropriate equation for f. Be familiar with the guidelines for when it is appropriate to use the Darcy Weisbach equation for natural gas pipeline flow calculations. Be able to use the Darcy Weisbach equation and the Moody friction factor equations to calculate the frictional pressure drop for a given flow rate of a specified fluid through a pipe with known diameter, length and roughness. 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 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 B 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. Intended Audience: for civil, mechanical, petroleum, construction, and hydraulic engineers. Publication Source: Harlan H. Bengtson, PhD, PE