MARPOL Annex II – Category X Products – Exemption from a Pre-Wash

MARPOL Annex II – Category X Products – Exemption from a Pre-Wash

MARPOL states that after discharging, all tanks must be pre-washed and the resulting residues discharged to a reception facility: – Regulation 16 4 A tank which has carried a Category X substance shall be prewashed in accordance with regulation 13.6. The appropriate entries of these operations shall be made in the Cargo Record Book and endorsed by the surveyor referred to under paragraph 1 of this regulation. However, there are still ports where an approved MARPOL surveyor is not available…

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MDI / PMDI / MMDI

MDI / PMDI / MMDI

Most owners / operators of chemical tankers that are able to carry such products will already have procedures in place for the handling of these chemicals. The most important item is to ensure that the tanks, lines and pumps are completely free of any moisture, purging with nitrogen to a dewpoint of -40C being the most common method of ensuring this requirement. However, there are cases where moisture has entered the tank, causing polymerisation with dried residues remaining on the…

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Coating Failures and Defects

Coating Failures and Defects

A Comprehensive Field Guide A guide containing many examples of failures and defects, together with descriptions, probable causes, and suggested preventative measures. Compiled by two of the leading experts in this field, Brenden Fitzsimons, the author of both volumes of Fitz’s Atlas, and Trevor Parry, the UK appointed expert to International Standards Organisation Committees. Use the link below to view or download the Guide.

IBC Code – The 2021 Changes

IBC Code – The 2021 Changes

The 2021 revision to the IBC Code follows a prolonged (20 plus years) effort by the Evaluation of Safety and Pollution Hazard of Chemicals (ESPH) Working Group. The 2007 revision to the Code overhauled the pollution requirements, with the A, B, C & D groups, becoming the now familiar X, Y, Z & OS groups. This 2021 revision now addresses the updates to the safety aspects of the Code, with a redrafted Chapter 21 – Criteria for assigning carriage requirements…

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Molasses – Foaming

Molasses – Foaming

Normally, stored molasses seldom shows any unusual behaviour, however like all such extracts from plant-based production, it can deteriorate over time, and at elevated temperatures resulting in a loss of sugars. This results in fermentation, shown as a ‘gassing’ reaction, producing volumes of CO2 and Ethyl Alcohol. Mostly CO2. The ‘gassing’ reaction consists in small bubbles in the molasses which are retained in the bulk liquid for some time and which  manifests itself in frothing, and an increase in volume…

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Dye Discolouration

Dye Discolouration

Dye discolouration caused by the carriage of dyed gasoline (for example) can be removed by recirculation washing with a Sodium Hypochlorite (Bleach) Solution. Sodium Hypochlorite is normally supplied as a 12% solution. Make a 2% solution of this supplied 12% solution in water (freshwater preferred, otherwise seawater) and recirculation wash at a maximum temperature of 40 deg C. 2% of a supplied 12% solution is 200 liters in 10,000 liters of water.

PTT (Improving Test Results)

PTT (Improving Test Results)

Oxidized residues of previous cargoes can cause a failure of the PTT. To improve the results, wash with a Sodium Hypochlorite Solution (Bleach) in freshwater. Sodium Hypochlorite is normally supplied as a 12% solution. Make a 2% solution of this supplied 12% solution in water (freshwater preferred, otherwise seawater) and recirculation wash at a maximum temperature of 40 deg C. 2% of a supplied 12% solution is 200 liters in 10,000 liters of water. Also used to remove red/yellow dye…

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Sodium Hydroxide (Caustic Soda Solution) – Cleaning with

Sodium Hydroxide (Caustic Soda Solution) – Cleaning with

Sodium Hydroxide may react with the calcium and magnesium in seawater during tank cleaning operations to form calcium and magnesium hydrates which shows as white powdery deposits left on the cargo tank surfaces, especially when using hot water washing. A freshwater rinse following a caustic recirculation wash prior to the final seawater wash will assist in the prevention of such deposits. Such deposits may be removed by washing with an acid-based cleaner. Washing with a Potassium Hydroxide Solution instead of…

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Charter Party Abbreviations

Charter Party Abbreviations

AAOSA ALWAYS AFLOAT OR SAFE AGROUND ACCT ACCOUNT AD ARRIVAL DRAFT ASAP AS SOON AS POSSIBLE     BACTAP BUT AS CLOSE TO AS POSSIBLE B4 BEFORE OR BEAUFORT BBB BEFORE BREAKING BULK BBLS BARRELS, 1 BARREL = 159 LITRES BCM BOW TO CENTER MANIFOLD BLT BUILT     CAD CASH AGAINST DOCUMENTS CBM CUBIC METER CBT CLOSED BALLAST TANK C&F COST, INSURANCE AND FREIGHT C&F FO COAT AND FREIGHT FREE OUT CGO CARGO CHOPT CHARTERERS OPTION CHOPTFCNDFCAPMQS CHARTERERS OPTION…

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Geographical Abbreviations

Geographical Abbreviations

AARA – AMSTERDAM ANTWERP ROTTERDAM AREA AG – ARABIAN GULF A-H RNG – ANTWERP HAMBURG RANGE ARA – AMSTERDAM ROTTERDAM ANTWERP B-H – BORDEAUX HAMBURG RANGE C/O – CUBA AND ORINOCO RIVER PORTS DEN – DENMARK ECC – EAST COAST CANADA ECI – EAST COAST INDIA ECM – EAST COAST MEXICO ECMEX – EAST COAST MEXICO ECSA – EAST COAST SOUTH AMERICA ECUK – EAST COAST UNITED KINGDOM ESSA – EAST COAST CENTRAL AMERICA GBS – GERMAN BALTIC SEA G-H…

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