Pressure loss data for large pipe ells, reducers and expansions


Reports the determination of pressure loss coefficients for long radius ells, concentric pipe reducers and concentric pipe expansions. States forged steel welded fittings were tested in the sizes of 12 in., 6 in., 20 in. and 24 in. (30.5 cm, 40.6 cm, 50.98 cm and 61 cm) for the ells, reducers and expansions. Notes a total of 32 individual fittings from four different manufacturers were tested to determine loss coefficient values. Each test fitting was examined at a specified range of pipe velocities to determine mean and variation of loss coefficients. Summarises the loss coefficients from the test results in a table and illustrates how each vendor performed relative to one another.

Primary Author(s): Rahmeyer W J

Source: ASHRAE Trans., 2002, vol.108, part 1, paper number 4533 (RP-1034) 360-375, 9 figs, 22 tabs, refs.

             BSRIA Abstract Doc 000103788 Abs 20020758

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