Record Display for the EPA National Library Catalog


Main Title Angular flow insensitive pitot tube suitable for use with standard stack testing equipment /
Author Mitchell, W. J. ; Blagun, B. E. ; Johnson, D. E. ; Midgett, M. R.
Other Authors
Author Title of a Work
Mitchell, W. J.
CORP Author Environmental Monitoring and Support Lab.-Cincinnati, OH.
Publisher Environmental Monitoring and Support Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1979
Report Number EPA-600/4-79-042
Stock Number PB80-102007
OCLC Number 45666119
Subjects Pitot tubes ; Flue gases--Testing
Additional Subjects Flue gases ; Flow measurement ; Pitot tubes ; Gas flow ; Sampling ; Velocity measurement ; Field tests ; Air pollution ; Angular flow ; Cyclonic flow ; Air pollution monitors
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600/4-79-042 Headquarters Library/Washington,DC 04/14/2014
EKBD  EPA-600/4-79-042 Research Triangle Park Library/RTP, NC 08/22/2003
ELBD ARCHIVE EPA 600/4-79-042 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 600-4-79-042 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB80-102007 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vii, 78 p. : ill. ; 28 cm.
Five pitot tube designs were tested under various gas flow conditions for accuracy in measuring static and total pressure. The static- and impact-pressure measuring tubes least affected by angular flow were combined and then evaluated in the presence of standard particulate sampling nozzles. Tests were performed on 'S', 'L', Kiel and cylinder pitot tubes and a shielded static-pressure pitot tube. The percent error for each pitot tube was determined as a function of yaw, pitch, orifice size, orifice location, pitot tube size, and velocity. A pitot tube was developed that is accurate within 5% when yawed and pitched + or - 30 degrees even while attached to a standard EPA Method 5 sampling assembly. This pitot tube was field tested at a sewage sludge incinerator, a clay crushing plant and a power plant. Also included in the report are: a summary of the existing literature on design of 'L' pitot tubes; a summary of the present state-of-the-art in sampling stacks with cyclonic flow and the errors involved in such sampling; a recommendation for straightening cyclonic flow by insertion of a venturi throat; and the effect of Reynolds Number on pitot tube accuracy.
"June 1979"--Cover. Includes bibliographical references. "EPA-600/4-79-042."