Status:Closed Asked:Jul 06, 2011 - 06:04 AM
What random vibration PSD should I use for ocean shipment? What don’t ISTA Procedures include ocean PSDs?
ISTA Procedures and other industry-standard packaging test protocols don't contain PSD profiles for ocean shipment. This is beacuse numerous studies have shown that vibration during sea transport is so small its negligible. This is not to say that ocean shipment is benign - there are shocks due to loading and unloading, ship motions can cause the shifting of goods, there is potential damage from extreme temperatures and humidites, and compression forces due to stacking can be large - it's just that vibration is not an issue.
Since essentially every ocean shipment also involves other kinds of transport (road, rail, air) to and from the port, it is deemed sufficient to simulate those other transport vibrations and ignore ocean vibration.
Source: ISTA Staff
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