Subscribe to our Mailing Lists (It's free!)
Saturday, January 28, 2023
SAFETY4SEA
  • Home
  • Safety
    • All
    • Accidents
    • Alerts
    • Loss Prevention
    • Maritime Health
    • Regulation
    • Safety
    • Seafarers
    • Security
    worker injures finger

    Lessons learned: Be aware of the risks around you

    pilot ladder

    Lessons learned: Safety critical equipment should always be inspected before use

    port of rotterdam accidents

    Port of Rotterdam: Small decrease in accidents in 2022

    uae Harmonized System of Survey and Certification for ships

    UAE: Adoption of Harmonized System of Survey and Certification for ships

  • SEAFiT
    • All
    • Intellectual
    • Mental
    • Physical
    • Social
    • Spiritual
    Meditation

    What happens when you meditate daily: 10+1 benefits

    kidney stones

    Preventing kidney stones: How to stay hydrated onboard

    sleep schedule

    Feeling tired? Tips to reset your sleep schedule

    seasickness

    Tips for managing seasickness onboard

  • Green
    • All
    • Arctic
    • Ballast
    • Emissions
    • Fuels
    • Green Shipping
    • Pollution
    • Ship Recycling
    • Technology
    us ferries zero emissions

    US: Funding to accelerate ferries’ transition to zero emissions

    mol ammonia bulker

    ClassNK approves ammonia-powered bulker

    port of rotterdam maritime bunkers

    Port of Rotterdam: Demand for maritime bunkers increase in 2022

    poseidon principles annual report

    Poseidon Principles: Annual Disclosure Report

  • Smart
    • All
    • Connectivity
    • Cyber Security
    • E-navigation
    • Energy Efficiency
    • Maritime Software
    • Smart
    allianz cyber risks

    Allianz: Cyber risks the most important risk globally

    ig clubs electronic bills of lading

    IG Clubs approve blockchain system for electronic bills of lading

    port of rotterdam drones

    Port of Rotterdam: Airspace organized for drone use

    port of tilbury portchain

    Port of Tilbury: Digital solution to create reliable berth plans

  • Risk
    • All
    • CIC
    • Detentions
    • Fines
    • PSC Focus
    • Vetting
    fmc delay and disruption claims

    FMC: Increase in “Delay and Disruption” claims

    crew jail illegal sell of marine gas oil

    Singapore: 11 crew jailed due to Illegal sale of marine gas oil

    uk mca ships detentions

    UK MCA: Five new foreign flagged ships detained during December 2022

    shipowner operator fined

    US: Shipowner and operator fined $2m over illegal discharges

  • Others
    • All
    • Diversity in shipping
    • Maritime Knowledge
    • Offshore
    • Ports
    • Reports
    • Shipping
    • Sustainability
    • Videos
    underwater noise

    Clean Arctic Alliance: Underwater noise progress welcome, but more action necessary

    energy crisis

    Energy crisis: New global risk causes disruption in 2023

    ukraine low grain exports

    Ukraine: Slow pace of Russian inspections responsible for low grain exports

    port of rotterdam accidents

    Port of Rotterdam: Small decrease in accidents in 2022

  • Columns
    Maritime Just Transition Task Force: Engaging industry in social dialogue

    Maritime Just Transition Task Force: Engaging industry in social dialogue

    Career Paths: David Tournay, Maritime Skills Alliance

    Career Paths: Sinikka Hartonen, One Sea Association

    Career Paths: David Tournay, Maritime Skills Alliance

    Career Paths: David Tournay, Maritime Skills Alliance

    Trending Tags

    • Career Paths
    • Industry Voices
    • Maripedia
    • Maritime History
    • Resilience
    • Seafarers Stories
    • SeaSense
  • Events
  • Plus
No Result
View All Result
  • Home
  • Safety
    • All
    • Accidents
    • Alerts
    • Loss Prevention
    • Maritime Health
    • Regulation
    • Safety
    • Seafarers
    • Security
    worker injures finger

    Lessons learned: Be aware of the risks around you

    pilot ladder

    Lessons learned: Safety critical equipment should always be inspected before use

    port of rotterdam accidents

    Port of Rotterdam: Small decrease in accidents in 2022

    uae Harmonized System of Survey and Certification for ships

    UAE: Adoption of Harmonized System of Survey and Certification for ships

  • SEAFiT
    • All
    • Intellectual
    • Mental
    • Physical
    • Social
    • Spiritual
    Meditation

    What happens when you meditate daily: 10+1 benefits

    kidney stones

    Preventing kidney stones: How to stay hydrated onboard

    sleep schedule

    Feeling tired? Tips to reset your sleep schedule

    seasickness

    Tips for managing seasickness onboard

  • Green
    • All
    • Arctic
    • Ballast
    • Emissions
    • Fuels
    • Green Shipping
    • Pollution
    • Ship Recycling
    • Technology
    us ferries zero emissions

    US: Funding to accelerate ferries’ transition to zero emissions

    mol ammonia bulker

    ClassNK approves ammonia-powered bulker

    port of rotterdam maritime bunkers

    Port of Rotterdam: Demand for maritime bunkers increase in 2022

    poseidon principles annual report

    Poseidon Principles: Annual Disclosure Report

  • Smart
    • All
    • Connectivity
    • Cyber Security
    • E-navigation
    • Energy Efficiency
    • Maritime Software
    • Smart
    allianz cyber risks

    Allianz: Cyber risks the most important risk globally

    ig clubs electronic bills of lading

    IG Clubs approve blockchain system for electronic bills of lading

    port of rotterdam drones

    Port of Rotterdam: Airspace organized for drone use

    port of tilbury portchain

    Port of Tilbury: Digital solution to create reliable berth plans

  • Risk
    • All
    • CIC
    • Detentions
    • Fines
    • PSC Focus
    • Vetting
    fmc delay and disruption claims

    FMC: Increase in “Delay and Disruption” claims

    crew jail illegal sell of marine gas oil

    Singapore: 11 crew jailed due to Illegal sale of marine gas oil

    uk mca ships detentions

    UK MCA: Five new foreign flagged ships detained during December 2022

    shipowner operator fined

    US: Shipowner and operator fined $2m over illegal discharges

  • Others
    • All
    • Diversity in shipping
    • Maritime Knowledge
    • Offshore
    • Ports
    • Reports
    • Shipping
    • Sustainability
    • Videos
    underwater noise

    Clean Arctic Alliance: Underwater noise progress welcome, but more action necessary

    energy crisis

    Energy crisis: New global risk causes disruption in 2023

    ukraine low grain exports

    Ukraine: Slow pace of Russian inspections responsible for low grain exports

    port of rotterdam accidents

    Port of Rotterdam: Small decrease in accidents in 2022

  • Columns
    Maritime Just Transition Task Force: Engaging industry in social dialogue

    Maritime Just Transition Task Force: Engaging industry in social dialogue

    Career Paths: David Tournay, Maritime Skills Alliance

    Career Paths: Sinikka Hartonen, One Sea Association

    Career Paths: David Tournay, Maritime Skills Alliance

    Career Paths: David Tournay, Maritime Skills Alliance

    Trending Tags

    • Career Paths
    • Industry Voices
    • Maripedia
    • Maritime History
    • Resilience
    • Seafarers Stories
    • SeaSense
  • Events
  • Plus
No Result
View All Result
SAFETY4SEA

How to ensure safe operation when carrying hazardous chemical cargoes

by The Editorial Team
October 26, 2022
in Loss Prevention
hazardous chemical cargoes
FacebookTwitterEmailLinkedin

In collaboration with CWA International, the Swedish Club has produced cargo advice to assist operators in the daily operation of their vessels, in relation to hazardous chemical cargoes.

A large range of chemical commodities is carried on board chemical tankers, totalling more than 5,000 different chemical products and grades. These chemical products often have a high minimum purity due to their intended end uses.

The contamination of chemical cargoes can often affect the suitability for their intended end use, and this can play a significant role in the cargo’s value. As a result, special consideration should be given towards these sensitive cargoes in order to ensure their proper carriage.

Guidelines for the shipment of hazardous chemical cargoes

RelatedNews

How to ensure optimal efficiency of purifiers onboard

Watch: How can personal mobile devices affect attention onboard

#1 Pre-loading: The large variety of different chemical cargoes carried by chemical tankers means that there is a possibility of incompatible products being carried consecutively. As a result, special attention must be paid to ensuring cargo tanks are thoroughly cleaned. Very large industry standard cleaning matrices are available covering the various grade changeover combinations.

In order to ensure sufficient tank preparation has been carried out, thorough pre-loading surveys of a vessel’s cargo tank/pump/heating equipment/ lines will be performed, including visual inspection of tanks together with wall-wash tests, when appropriate, prior to the loading of a ‘first foot’ trial quantity of cargo.

In addition to the pre-loading surveys often carried out by shippers’ surveyors, first foot sampling methods can give a good indication of the cleanliness of cargo tanks and lines. This is because any contaminants present in the shore or vessel lines or the cargo tanks will be concentrated in the first foot samples.

However, tanks coated with epoxy type coating systems can absorb light solvent species, such as aromatics, which may not immediately be detected during pre-loading inspections.

As with residues of previous cargoes, water is undesirable in high purity chemical cargoes. Moisture can enter a cargo via insufficient tank/line ventilation and draining of wash water, although this will typically be detected in the pre-loading survey and first foot samples.

#2 Risks associated with carriage: Many cargoes carried on board chemical tankers are prone to undergoing chemical reactions, either by themselves or with impurities or air. These reactions reduce the purity of the products and in some cases can generate large amounts of heat which presents a safety risk.

Depending on the exact cargo involved, there are several factors which must be considered when stowing cargoes with a limited ‘shelf-life’, such as:

  • Oxygen content
  • Inhibitor content
  • Temperature

In addition, high temperatures generally increase the rate of chemical reactions – an increase in 10°C is often said to double the rate of many chemical processes, and therefore increased storage temperatures lead to a reduced ‘shelf-life’ of the chemical.

Nevertheless, some cargoes require heating to ensure fluidity during cargo operations to prevent short delivery. In order to prevent overheating, strict control of temperatures is required to ensure a balance between fluidity and chemical stability in order to prevent both shortage and quality disputes.

Moreover, some chemical cargoes are particularly reactive towards oxygen and, as such, control of tank atmosphere may also be required by way of nitrogen blanketing for partial or total exclusion of oxygen (for example with propylene oxide/hexamethylene diamine-HMD). Partial reduction of oxygen is also warranted for a range for oxygen dependent inhibited cargoes, such as styrene and isoprene monomers, to prevent selfpolymerisation.

Lessons learned

  • Ensure that the stowage plan is suitable. When stowing cargo in adjacent tanks pay attention to cargo carriage temperature restrictions. This is especially important when the vessel is loading cargo at several ports.
  • Comply with charterers’ carriage instructions, paying particular attention to temperature and oxygen content. If these are unclear, seek clarification.
  • Monitor the temperature of the cargo at upper, middle and lower levels through the cargo column at least once a day during the voyage to ensure compliance with heating rates and carriage temperatures, where appropriate.
  • Recirculate the cargo if required. This is important for inhibited cargoes which depend on dissolved oxygen content to maintain inhibition.

EXPLORE the guidance ON Hazardous chemical cargoes

Tags: chemicalshazardous materialsloss preventionreportssafety measuresSwedish Club

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Recommended

underwater noise

Clean Arctic Alliance: Underwater noise progress welcome, but more action necessary

January 27, 2023
energy crisis

Energy crisis: New global risk causes disruption in 2023

January 27, 2023

SEAFiT Poll

What is the biggest obstacle for the social life onboard?

MARITIME EVENTS

Explore

  • Safety
  • Green
  • Smart
  • Risk
  • Others
  • Events
  • Plus

Useful Links

  • About
  • Disclaimer
  • Editorial Policies
  • Advertising
  • Contact

RISK4SEA Facts

Did you know how many Managers got detentions in Australia? 87 managers with Bulk Carriers got detentions during 2020.

Learn more risk4sea.com

© 2021 SAFETY4SEA

No Result
View All Result
  • Safety
    • Alerts
    • Accidents
    • Loss Prevention
    • Maritime Health
    • Regulation
    • Safety
    • Seafarers
    • Security
  • Green
    • Arctic
    • Ballast
    • Emissions
    • Fuels
    • Green Shipping
    • Pollution
    • Ship Recycling
    • Technology
  • Smart
    • Connectivity
    • Cyber Security
    • E-navigation
    • Energy Efficiency
    • Maritime Software
    • Smart
  • Risk
    • CIC
    • Detentions
    • Fines
    • PSC Focus
    • Vetting
  • Others
    • Diversity in shipping
    • Maritime Knowledge
    • Offshore
    • Ports
    • Reports
    • Shipping
    • Sustainability
    • Videos
  • Columns
    • Opinions
    • Career Paths
    • Industry Voices
    • Maripedia
    • Maritime History
    • Seafarers Stories
    • SeaSense
  • Events
  • Plus

© 2021 SAFETY4SEA

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Disclaimer.