Bulk Carrier Guide Online
Bulk Carrier Guide Online
Home ||| Bulk Cargo ||| Planning ||| Care ||| Safety||| Self unloaders

Petcoke loading in bulk & associated problems for bulk carriers

Petcoke is short for petroleum coke, which is a byproduct of the oil refinery coking process that produces low-cost fuel, often with a high sulphur content. Petcoke may also be known as green delayed coke, sponge coke, needle coke, delayed coke or raw coke-fuel grade.

Black, finely divided residue from petroleum refining in the form of powder and small pieces. The provisions of this schedule should not apply to materials having a temperature below 55 degree C when loaded

Petcoke Characteristics :
Bulk density ( Kg/m3) 599 to 800
Stowage Factor (m3/t) = 1.25 to 1.67

Pet coke definition
Fig: Bulk cargo loading - pet coke

Consideration prior loading

Petcoke Loading Port: New Orlean, USA : Port Elizabeth
Discharging port: Huasco, Chile: Qinzhou , China

Bulk carrier ready for loading
Fig: Side rolling hatch cover opened

Petcoke loading guideline

1. When the cargo is loaded in a cargo space over a tank containing fuel or other material having a flashpoint under 93 degree C, the cargo having a temperature of 55 degree C or higher shall not be loaded in the cargo space, unless part of the cargo having a temperature 44 degree C or lower is loaded in lawyer of at least 0.6 m thickness throughout the cargo space prior to load the cargo having a temperature of 55 degree C or higher.

2. When the cargo having a temperature of 55 degree C or higher is loaded in accordance with the above requirement and thickness of the layer of the cargo to be loaded is bigger than 1.0 m the cargo shall first be loaded within a layer, the thickness of which is between 0.6 m and 1.0 m

3. After completion of loading operation specified in the above paragraphs, the loading operation may proceed.

Trim in accordance with the relevant provisions required under section 4 and 5 of the IMSBC code. As the density of the cargo is extremely high, the tank top may be overstressed unless the cargo is evenly spread across the tank top to equalize the weight distribution. Due to consideration shall be paid to ensure that the tank top is not overstressed during voyage and during loading by a pile of the cargo.

Bulk carrier washing down holds
Fig: Washing down holds

Petcoke - possible problems when washing holds

The MARPOL Convention exists to prevent pollution of the worlds oceans by ships and to protect the marine environment. Petroleum coke (petcoke), is a solid material 95% carbon, wholly insoluble in water and contains no oil in liquid form. Petcoke appears in the 'Gesamp/EHS.* Composite list of Hazard Profiles' which is published by the IMO. This states that it has no bioaccumulative effects, is non hazardous to marine organisms and humans (oral intake or skin, eye contact or inhalation). Finally petcoke does not reduce the value of amenities (eg if petcoke is washed ashore after a discharge the beach does not need to be closed due to hazardous effects). This analysis is obviously not applicable to petcoke dust where it can be hazardous to humans.

Due to the existence of aerial surveillance, especially over european waters, it can be expected that patches of 'discoloured water' will be readily observed, leading to the arrest of errant ships. Owners and Masters must be most cautious in their assessment of the environmental consequences of discharging hold washings at sea under MARPOL regulations. It must also be remembered that disposal at sea within 'Special Areas' is forbidden, these include the Gulf of Mexico, The Caribbean and european waters including all Economic Exclusion Zones (EEZ).

Read more on Petcoak loading & Hold cleaning requirements

Related Information

  1. Hazards of handling copper concentrate

  2. Hazards of handling bulk sulphur

  3. Loading, carrying and discharging of bulk coal

  4. Special precaution & IMSBC code guideline for handling bulk coal

  5. Special arrangements for carrying grain cargo

  6. Grain handling precautions - various limitations

  7. Safety precautions for loading and carriage of iron ores

  8. Risk of carrying high density iron ores in bulk

  9. Salt loading guideline - Precautions & hold preparation

  10. Pig iron preparations for bulk loading

  11. Procedure for fishmeal loading in bulk

  12. Risk of iron ore liquefaction during sea passage & countermeasures

  13. Handling of bauxite - The environmental impact of Jamaica bauxite mining

  14. Carrying gypsum -Toxins, physical reactions & environmental degradation

  15. Preparations, loading, carrying & discharging bulk cement

  16. Cargo liquefaction & potential problem for transporting bulk cargo

Our detail pages illustrated many safety aspects of Bulk carrier

Home page |||Bulk carrier types ||| Handling of bulk coal |||Cargo planning ||| Carriage of grain |||Risk of iron ores |||Self unloading bulk carriers |||Care of cargo & vessel |||Cargoes that may liquefy |||Suitability of ships |||Terminal guideline |||Hold cleaning |||Cargo cranes |||Ballast handling procedure |||Bulk carrier safety |||Fire fighting systems |||Bulk carrier General arrangement

Top articles

  1. Bulk carrier types - Ore carriers, OBO ships, forest product carrier , self unloader and more

  2. Care of cargo during loading- Trimming pours

  3. Checklist for confirming stabilty and hull stress prior loading

  4. Cargo loading agreement between ship and terminal

  5. Bulk carrier loading manual

  6. Handling of deballasting (ship duties) during high loading rate

  7. Cargo and ballast handling guide

  8. Responsibility of ship during cargo operation

  9. Shipboard hazards & bulk carriers safety guideline

  10. Asymmetric cargo and ballast distribution for bulk carriers

  11. Limitations on exceeding load lines

  12. Risk of deviation from the loading limitations

  13. Cargo handling guidance for deck officers

    Ventilation requirement for bulk cargo loaded

  14. Preparation for ships carrying bulk cargo & standard loading condition

  15. Monitoring cargo operation safety checks in a bulk terminal

  16. How to avoid cargo damage by applying proper ventilation methods

  17. Measures against liquefaction of bulk cargo

  18. How to plan cargo discharge in a safe manner ?

Operation of sea going bulk carriers involved numerous hazards . Careful planning and exercising due caution for all critical shipboard matters are important . This site is a quick reference to international shipping community with guidance and information on the loading and discharging of modern bulk carriers so as to remain within the limitations as specified by the classification society.
It is vital to reduce the likelihood of over-stressing the ship's structure and also complying with all essential safety measures for a safe passage at sea. Our detail pages contain various bulk carrier related topics that might be useful for people working on board and those who working ashore in the terminal. For any remarks please Contact us

Copyright © 2010 bulkcarrierguide.com All rights reserved.

Although every effort have been taken to improve the accuracy of content provided the publisher of this website cannot gaurantee for errors. Disclaimer Privacy policy Home page