October, 2017

201711OctAll DayFailure of High Density Polyethylene storage tank primary and secondary containments resulting in leakage into a bunded delivery areaPSF Safety Alert 011 Origin: PSF Lessons:Asset integrityLanguage:EN TagsHDPE

Summary

On the 4th of April 2016, a leak was reported coming from the secondary containment wall of a High Density Polyethylene (HDPE) storage tank containing Sodium Hypochlorite into its surrounding bunded delivery area. No Sodium Hypochlorite leaked from its final containment into the surrounding environment, however if this had been the case it could have presented an environmental hazard.

As a result of the leak, plant systems using the Sodium Hypochlorite were shut down. Over time this could lead to an increase in the potential of marine growth in various plant systems, resulting in those systems becoming less effective. Once inspected, it became apparent that the leak stemmed from weld failures on both the secondary and primary containments of the tank. A temporary tank was put in place until a permanent replacement was commissioned and installed


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Origin

PSFProcess Safety Forum

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