Failure investigation
Failure investigation: scope, limits of use and technical checkpoints.
5 guides
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Root cause investigation form for hose failures
Root cause analysis of a hose failure investigates use, assembly, material and operating conditions together, rather than simply labeling the damage as a product defect. The final point of rupture may not be where the f…
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Kinking or puncture at the base of the fitting
Damage occurring near the fitting requires an examination of the movement and load transfer at the hose's connection exit. Insufficient straight section, torsion, tension, vibration or incorrect routing are among the po…
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Outer surface abrasion and protection
External abrasion can result from the hose rubbing against another surface or from environmental contact. An abrasion-resistant sleeve can reduce the risk; however, it does not eliminate incorrect routing, improper supp…
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Separation, swelling and cracking of the inner layer
Swelling, layer separation and cracking are different signs of damage. Chemical attack, temperature, aging or mechanical stress must be investigated; a single cause or a safe remaining life cannot be determined from ext…
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Non-hose causes of recurring leaks
With a recurring leak, the loads on the system and the compatibility of the connection must be investigated instead of simply retightening the fitting. Pressure surges, vibration, line stress, contamination or the wrong…
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