Baseline conditions for orifice meter calibration, Topical report, February 1990-July 1992

Technical Report · Thu Oct 01 00:00:00 EDT 1992

OSTI ID:6949792

Morrow, T B; Park, J T

The study analyzes nominal 102 mm (4') baseline orifice discharge coefficient, data for Beta ratios between 0.2 and 0.75 from several independent laboratories in the United States and Europe. Graphs of Cd vs. Reynolds number are presented for each data set, and each data set was analyzed to determine the statistical mean deviation and standard deviation from the American Gas Association (A.G.A.) Report No. 3 orifice coefficient equation. Baseline orifice Cd data taken in the Gas Research Institute Metering Research Facility (MRF) flowing nitrogen agree well with comparable high accuracy baseline data from the other laboratories. For Beta ratio values between 0.2 and 0.67, the mean deviation of MRF baseline data from the A.G.A. Report No. 3 orifice equation ranges from 0.05% to 0.20%. Vertical and horizontal profiles of mean axial velocity and axial turbulence intensity were measured in the MRF under typical baseline flow conditions for meter run lengths of 45 D and 100 D. The baseline profiles of mean axial velocity satisfy the International Standards Organization (ISO) 5167 requirement of less than + or - 5% variation from a fully developed, turbulent flow velocity profile.

• Research Organization: Southwest Research Inst., San Antonio, TX (United States)
• OSTI ID: 6949792
• Report Number(s): PB-93-147346/XAB; CNN: GRI-5086-271-2197
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ACCURACY
BETA RATIO
CALIBRATION
DATA
DEVELOPED COUNTRIES
ELEMENTS
EUROPE
FLOWMETERS
FLUID FLOW
GAS FLOW
INFORMATION
INTERNATIONAL ORGANIZATIONS
ISO
LABORATORIES
MEASURING INSTRUMENTS
METERING
METERS
NITROGEN
NONMETALS
NORTH AMERICA
NUMERICAL DATA
OPENINGS
ORIFICES
REYNOLDS NUMBER
STANDARDS
STATISTICAL DATA
TURBULENCE
TURBULENT FLOW
USA
VELOCITY