Measurement of ovality in pipe introduced due to bending

A. V. Kale, H. T. Thorat

Abstract

Commonly used pipe bending mechanisms are studied in the small-scale industries. Defects introduced in the pipe due to bending on these mechanisms are observed and reasons behind these defects are studied. Ovality is a main defect in the entire pipe bending techniques. To measure the ovality, experimentation is carried out on the existing compression bender. Out of various sizes and materials available, ten pipes of three different materials with variable thickness are selected. Their maximum and minimum diameters are checked before bending. From these diameters, initial ovality and percentage ovality is computed and recorded. These ten pipes are bent on the existing compression bender. Maximum and minimum diameters of these pipes are measured after bending. Increase in percentage ovality after bending is computed. Average values of the percentage ovality are presented in this paper. From the experimental results, it is observed that bent pipe is almost flattened in the bent portion in the existing mechanism, which reduces strength and aesthetics of the fabrication work and hence required to be controlled.

Keywords

Pipe Bending; Defects in Pipe Bending; Compression Bending

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IMEKO-TC14-2007-51.pdf

DOI

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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