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Tuesday, 29 March 16
BULK CARRIER VENTILATION - CAPTAIN PAUL R. WALTON
 KNOWLEDGE TO ELEVATE
Moisture damage is a source of many cargo claims. Claimants allege that it is brought about by the ship’s failure to ventilate correctly, resulting condensation (known as ‘sweat’). This sweat can seriously damage the quality of bulk cargoes like grain, seedcake and steel surfaces. Cargo sweat is condensation forming on the surface of a ‘cold’ cargo as warm, moist air enters the cargo hold.
To avoid the possibility of cargo sweat, ventilators should be closed and no ventilation carried out. However, if the moisture content of the cargo is high, extraction of the moist air from within the cargo holds may be required. Ship’s sweat is the result of condensation forming on the ship’s structure as the ship becomes colder moving from a hot to a cold climate. For ship sweat to occur, the dew point in the cargo hold must exceed the temperature of the ship’s structure. To prevent this, cargo should be ventilated if the ship is moving from a warm to a cold climate. The shipper’s declaration should contain sufficient information about the cargo, particularly its moisture content (MC), transportable moisture limit (TML) and ventilation requirements, especially if the commodity is not normally carried or the areas of trade are uncommon.
Claims for moisture damage to cargo can only be defended if supported by properly maintained documentation. Records of hold temperatures, humidity and durations of ventilation are essential. The dew point temperature of the cargo hold and outside air should be compared. If the outside dew point temperature is lower or equal to the cargo hold, then ventilation should be continued. Ventilation not only controls sweating, it can also control gases or odours emitted from cargo. If there is a risk of seawater spray or rain entering the cargo holds, ventilation should be stopped and times noted until conditions change, allowing resumption of ventilation, even at night if required. If possible, there should be regular inspections of the cargo space for any signs of condensation and a complete record of cargo hold temperatures and ventilation should be kept.
Source: IUMI Eye, By Captain Paul R. Walton, Director, London Offshore Consultants, Hong Kong.
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Monday, 11 April 16
BDI ROSE TO ITS HIGHEST LEVEL IN FOUR MONTHS
COALspot.com: The Baltic Exchange, tracking rates for ships carrying dry bulk commodities continued to rose this week.
The freight market was ...
Friday, 08 April 16
COASTAL ENERGEN CROSSES GENERATION OF 1068 MW AND EXPORT OF 1004 MW FROM ITS 1200 MW IPP
COALspot.com: Coal & Oil (C&O) Group, an India centric Energy & Infrastructure company announced that their Coastal Energen' ...
Friday, 08 April 16
WEEKLY US COAL PRODUCTION ESTIMATES DIP 5.4% TO 11 MMST
COALspot.com – United States the world’s second largest coal producer has produced approximately totaled an estimated 11 million short ...
Friday, 08 April 16
MINISTER OF ENERGY AND MINERAL RESOURCES OF INDONESIA TO ISSUE REGULATION TO GUARANTEE THE COAL SUPPLY TO ITS 35K POWER PLANT PROJECTS
COALspot.com: In order to guarantee the supply of coal for 35,000 megawatt (mw) coal based power plants ( still in planning stage), the Minister of ...
Thursday, 07 April 16
CHINA STEEL CAPACITY CUTS FACE SOCIAL, FINANCIAL HURDLES - FITCH RATINGS
Fitch Ratings says today that the Chinese government's supply-side reform of the steel sector faces immense social and financial challenges. Th ...
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