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Is there a loss of head pressure in HDPE pipe due to the inner bead resulting from the butt fusion process?

April 26, 2017bead butt Fusion HDPE Head inner loss pipe pressure

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Is there a loss of head pressure in HDPE pipe due to the inner bead resulting from the butt fusion process?

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No. For pressure applications the Hazen-Williams C-factor of 150 already accounts for losses caused by the inner weld bead. Field tests confirm that the 150 C-factor used in the Hazen- Williams equation properly models the actual flow and that the bead is of no hydraulic significance.