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Function of Hooper tank in Bulk carrier ?

  • Hopper tanks are classified into bottom hoppers and top heavy wing tanks.
  • For bottom hoppers, the main purpose is to take ballast, so as to rapidly increase the vessel immersion, simultaneous reduction in metacentric height, and a change in Centre of gravity.
  • For top heavy wing tanks, the idea is to rapidly correct list of the vessel and act as active ballast tanks, for vessels such as Lakers where passages are narrow and cargo loading is often scattered.
  • Except for this, they contribute in cargo loading also because the side slopes allow the cargo to slide off and collect at the centre, thereby making the cargo collection easier at the end
  • Also, the hoppers are strengthened by additional transverse and longitudinal members, thereby supporting the port and starboard fuel tanks, and also distributing the cargo loading in a dynamic way to make sure the load is not concentrated at one point for higher loading speeds

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