Moisture damage is the source of a significant number of cargo claims. Claimants allege that this is brought about by the ship’s failure to ventilate correctly, resulting in the development of condensation (known as “sweat”). This sweat can lead to the deterioration of a number of bulk cargoes such as grain, seedcake and steel surfaces. All modern bulk carriers are fitted with some form of ventilation, either natural or mechanical, which can be used to minimize the formation of sweat.
Cargo Sweat
Cargo sweat is condensation forming on the surface of a “cold” cargo as warm, moist air enters the cargo hold. For example, if a cargo of steel is loaded in winter in North China for discharge in Singapore, the temperature of the cargo will be low. If warm moist air is later introduced in the cargo hold, condensation takes place as soon as it comes into contact with “cold” cargo.
See attached file: Bulk Carrier Ventilation.pdf
有关散货船的通风问题
湿损是大量货损索赔的主要原因。索赔方通常声称这是由于船舶未能保持良好的通风所致，导致冷凝形成(通常也叫“汗湿”)。这些水汽将导致散装货物品质恶化，例如谷物、种子饼及钢材货物表面。所有现代化的散货船均配备了自然或机械通风设备，从而最大限度降低水汽的形成。
货物水汽
当暖湿空气进入货舱后，“汗”通常形成于温度较低的货物表面。例如，冬季在中国北方装载钢材，而在新加坡卸货，装船时货物温度通常较低。如果暖湿空气进入了货舱并遇到表面温度较低的货物，通常便易于产生水汽。
详细信息请参阅附件。
