List of cargoes which generate heat, gases and moisture:

  1. Wood, paper pulp and agricultural products may result in rapid and severe oxygen depletion and formation of carbon dioxide.
  2. The IMSBC code lists the following cargoes as potentially oxygen depleting: coal, direct reduced iron, sponge iron, sulphide concentrates, ammonium nitrate based fertilisers, linted cotton seed. Various gaseous products are formed including carbon monoxide, carbon dioxide, hydrogen sulphide and hydro carbons.
  3. Some cargoes like coal and sulphur can cause severe damage due to corrosion.
  4. Common cargoes like coal, sulphur, cotton, and fishmeal are liable to spontaneous heating. Coal also emits methane which is a flammable gas. When mixed with air it can form an explosive mixture.
  5. Dust created by certain cargoes may constitute an explosion hazard. Sulphur dust can readily ignite causing an explosion.
  6. Friction between cotton bales can cause spontaneous combustion and produce heat.
  7. Ammonium nitrate-based fertilisers support combustion. If heated, contaminated or closely confined, they can explode or decompose to release toxic fumes and gases.
  8. Metal sulphide concentrates. Some sulphide concentrates are prone to oxidation and may have a tendency to self-heat, leading to oxygen depletion and emission of toxic fumes. Some metal sulphide concentrates may present corrosion problems.