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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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Sunday, 31 January 16
BDI CONTINUED ITS FALL AND CLOSE AT A FRESH RECORD LOW ON FRIDAY
COALspot.com: The Baltic Dry Index, which gauges the cost of shipping dry bulk including iron ore, cement, grain, coal and fertilizer, continued it ...
Friday, 29 January 16
INDONESIAN BENCHMARK COAL PRICE SETTLES DOWN $ 0.31, OR 0.58%, AT $ 53.20 A TON
COALspot.com: Low coal demand and excess supplies sent Indonesian benchmark coal price further down in January 2016. HBA has slumped by 0.58 ...
Friday, 29 January 16
U.S. COAL PRODUCTION OFF 2 PERCENT FROM LAST WEEK - EIA
COALspot.com – United States the world’s second largest coal producer has produced approximately totaled an estimated 13.1 milli ...
Thursday, 28 January 16
COAL REMAINS THE NO.1 FUEL FOR POWER GENERATION - EXXONMOBIL
COALspot.com: Energy demand trends from 2010 to 2040 are expected to vary significantly around the world, as countries move along very different tr ...
Thursday, 28 January 16
WHAT ARE THE PROSPECTS FOR COAL IN LIGHT OF THE PARIS CLIMATE AGREEMENT? - GERMAN COAL IMPORTERS ASSOCIATION
This depends – says the VDKi – to a very great extent on who you want to believe more, the United Nations or the International Energy A ...
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