High Speed Datalogger for Pipe FittingTest Bench - Sponsored Whitepaper

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Rotary Flex Testing on a Pipefitting Test Bench CHESTERLAND OH--May 16, 2011

Data acquisition systems have helped to increase quality control and cut costs in a wide range of manufacturing fields. One particular customer to discover this was a leading hydraulic tube and fitting manufacturer in India. Their company developed many different pipe-fitting systems and exported a full 90% of their products worldwide. With the use of a data acquisition system and its software monitoring a test bench, this company was able to optimize its rotary flex test procedures and guarantee a better product.

In order to ensure high product quality, it was necessary for the customer to perform both pressure and leakage tests on each production lot. The test engineers constantly performed a rotary flexure test of the hydraulic joints and fittings according to the ASTM F-1387 standard. The customer required a universal data acquisition system in order to monitor and automate this test bench application.

These tests were performed in a precise sequence: the hydraulic joints were first mounted to a 12mm-diameter tube which measured 6 inches long. This tube was then mounted to a support rest on one side and to a rotating spindle on the other side. The spindle was rotated at a speed of 1750 RPM. While the spindle was rotating, the pressure inside the tube was raised up to 25 BAR.

This test continued running for 10-15 minutes to measure the twisting forces of the tube and also to measure the pressure level. If the pressure started declining, the test engineer knew there were leakages on the fitting seal rings. The photo to the right shows the test bench setup:
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