Pipeline flow efficiency test data are reported for 16 natural gas transmission pipelines ranging from 12 to 55 inches in diameter. The data were taken in accordance with recommended procedures developed for obtaining maximum data reliability. For each pipe line section, data were obtained at several flow rates so that the effect of flow rate on transmission factor and flow efficiency could be determined. It is concluded that, within experimental error, pipeline transmission factors are independent of flow rate for fully-developed turbulent flow, which is represented by the operating conditions...
Pipeline flow efficiency test data are reported for 16 natural gas transmission pipelines ranging from 12 to 55 inches in diameter. The data were taken in accordance with recommended procedures developed for obtaining maximum data reliability. For each pipe line section, data were obtained at several flow rates so that the effect of flow rate on transmission factor and flow efficiency could be determined. It is concluded that, within experimental error, pipeline transmission factors are independent of flow rate for fully-developed turbulent flow, which is represented by the operating conditions normally encountered. At lower turbulent flow rates, smooth-pipe behavior is encountered. Insufficient eviderce exists for assumption of any particular type of transition from smooth-pipe to fully-turbulent behavior.