Abstract
Pressure losses were determined for nine 4-inch steel, 90° pipe bends of radii from 6 to 80 inches. The results are discussed in relation to those found by previous investigators under comparable test conditions. For bends having radii of four pipe diameters or less, all the results which are discussed may be correlated on the basis of pipe roughness. Further data are needed to establish a working formula. No correlation could be obtained for the bends of larger radii. For such bends the maximum published values should be used in engineering work until more comprehensive data become available.- Introduction
- Pipes and bends
- Apparatus
- Experimental results
- Discussion of results
- Future Work
- References
PURPOSE OF WORK
The 90° pipe bend is perhaps the most frequently used fitting in piping systems. The pressure losses in such bends fire therefore of considerable engineering importance. However, although many investigators have studied the problem, the results which they have obtained have not been satisfactorily correlated. The work discussed in this paper was undertaken to obtain information which would assist in the correlation of ~revious results, and further, to furnish data for engineering usc. ThIS work forms part of an extended study of pipe bends in progress at the National Hydraulic Laboratory, another part of which has already been published.
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