The St. Anthony Falls Hydraulic Laboratory was engaged by Kaiser
Aluminum and Chemical Sales, Inc., to determine the friction factors for
fully developed flow in 24 and 12 in. helical corrugated pipes flowing full
and to make qualitative observations of the pipe joint characteristics.
These pipes are unique in that the pipes were manufactured by customary
procedures for helical pipe and then the ends re-corrugated with four annular
rings using a special machine. The pipe characteristics are given in Fig. 1
and the physical features are shown in Figs. 2 and 3. The purpose of the re-corrugated
pipe ends is to make it more convenient to connect the pipes together
under field conditions.
Dahlin, Warren; Silberman, Edward.
Further Studies of Friction Factors for Helical Corrugated Aluminum Pipes with Re-Corrugated Annular Rings on Each End.
St. Anthony Falls Hydraulic Laboratory.
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