Astart ® 25-Dec-2013 19:47

Master's Guide for Hatchcovers Maintanance


Language: english
Format: PDF
Quality: eBook
Number of pages: 24
Description:
It is generally accepted that leaking hatch covers are a principal cause of cargo wetting.
The Standard Club has investigated numerous cargo wetness claims and has discovered that hatches leak
for a variety of reasons, but mainly because of poor maintenance or failure to close them properly. These two
problems are addressed in this guide.
During investigation and discussion we have found a degree of confusion throughout the industry as to
whether hatches are constructed to be watertight or weathertight. This is apparent when surveyors check
for watertightness during statutory inspections. Minor leakage during a test is often accepted as being within
the standard for weathertightness; in fact, no leakage is the requirement. For this reason, we include
guidance on procedures for conducting leak detection tests.
From our research we have the impression that many mariners think hatches are robust, monolithic
structures, thereby failing to appreciate the small tolerances on panel alignment and gasket compression.
For example, 4mm wear on the steel-to-steel contact is sufficient to damage rubber sealing gaskets beyond
repair; 5mm sag along the cross-joint can cause a large gap between the compression bar and gasket. It is
better to think of hatches as complex, finely-made structures, to be handled with care.
It is the aim of this guide to explain the key issues of hatch cover security and to steer mariners towards active
maintenance. In the Club’s opinion, it is less expensive to keep hatch covers watertight by regular maintenance
and attention to detail, than to pay claims for wet-damaged cargo.
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