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Pressure Drop Testing of Corrugated Stainless Steel Pliable Gas Tubing (PLT)

[+] Author Affiliations
Bharadwaj Srinivasan, Stephen A. Idem

Tennessee Tech University, Cookeville, TN

Paper No. IMECE2014-36668, pp. V007T09A021; 8 pages
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering Systems and Technologies
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4954-5
  • Copyright © 2014 by ASME


Pressure loss tests were conducted on straight corrugated stainless steel pliable gas tubing (PLT) per I.S. EN 15266:2007 [1]. A power law least-squares curve fit was used to relate pressure loss per unit length as a function of volume flow rate. For every case considered the calculated coefficient of determination values exceeded 0.90, indicating suitable correlation. Based on the curve fit expressions gas discharge graphs for the volume flow that would yield a pressure loss of 1 mbar were generated as a function of PLT length and diameter. Darcy friction factors were calculated from test data for each case and plotted on the Moody diagram as a function of Reynolds number based on the minimum PLT cross section. For Reynolds numbers less than 2300 the pressure loss data for PLT yielded an inverse relationship between the Darcy friction factor and the Reynolds number. In those instances the proportionality coefficient equaled 49, which differs from the value of 64 that can be derived analytically for steady laminar flow in a uniform cross section horizontal pipe.

Copyright © 2014 by ASME



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