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| Operation • Hazardous Cargoes • Dangers • Handling • Cleaning • Gas Blanketing • Heating • Miscellaneous • Fault Finding |
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| Hazardous Cargoes |
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| Hazardous materials are classified according to the nature of the hazard involved. The most widely accepted system is that promulgated by the United Nations and which is incorporated in the International Maritime Dangerous Goods Code (IMDG) and provides the foregoing classificarions for tank containers. | ||||||
| Class 1 Explosives | Class 2 Gases | |||||
| 1.1 Substances
and articles which have a mass explosion hazard (a mass explosion is one
which affects virtually the entire load almost instantaneously) 1.2 Substances and articles which have a projection hazard but not a mass explosion hazard 1.3 Substances and articles which have a fire hazard and either a minor blast hazard or a minor projection hazard or both, but not a mass explosion hazard 1.4 Substances and articles which present no significant hazard 1.5 very insensitive substances which have a mass explosion hazard |
Compressed: liquefied or dissolved under
pressure or liquefied by refrigeration 2.1 Inflammable* gases 2.2 Non-inflammable gases 2.3 Poisonous gases** * 'inflammable' has the same meaning as flammable ** Poisonous gases which are also inflammable should be segregated as Class 2.1 gases.  |
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| Class 3 Inflammable Liquids | Class 4 Inflammable solids or substances | |||||
| 3.1
Low flashpoint group of liquids having a flashpoint below - 18 deg C (0
deg F), closed cup test 3.2 Intermediate flashpoint group of liquids having a flashpoint of - 18 deg C (0 deg F) up to, but not including 23 deg C (73 deg F), closed cup test 3.3 High flashpoint group of liquids having a flashpoint of 23 deg C (73 deg F) up to, and including, 61 deg C (141 deg F), closed cup test |
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| 4.1 Inflammable
solids 4.2 Substances liable to spontaneous combustion 4.3 Substances emitting inflammable gases when wet (Certain inflammable solids, when molten, may be carried in tank containers. An example is molten sulphur which is in hazard Class 4.1) |
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| Class 5 Oxidising substances (agents) and organic peroxides | Class 6 Poisonous (toxic) and infectious substances | |||||
| 5.1
Oxidising substances (agents) 5.2 Organic peroxides (These are similar to oxidising substances but are additionally extremely unstable and heat sensitive in that an explosive reaction can occur if exposed to heat or if contaminated by reducing agents. Because of the facility to control temperature in transit, tank containers are an effective means of transporting organic peroxides). |
6.1
Poisonous (toxic) substances 6.2 Infectious substances (The majority of toxic substances require a Type 1 tank. For certain products a bottom opening is prohibited and a bursting disc may be required in series with the pressure relief device). |
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| Class 7 Radioactive substances | Class 8 Corrosives | |||||
| (The majority of corrosive substances require a Type 1 tank. For certain products a bottom opening is prohibited and a bursting disc may be required in series with the pressure relief device). | ||||||
| Class 9 Miscellaneous dangerous substances | ||||||
| This is an abbreviated summary. The UN 'Orange Book' or the IMDG code should be consulted for full information. | ||||||
| printing:
for best results use these links to download as PDF |
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