What are regulations for Deck Foam used for fire fighting as per FSS code ?

Foam solution and foam concentrate

The rate of supply of foam solution shall be not less than the greatest of the following:
  • 6 l/min per square metre of cargo tanks deck area, where cargo tanks deck area means the maximum breadth of the ship multiplied by the total longitudinal extent of the cargo tank spaces;
  • 6 l/min per square metre of the horizontal sectional area of the single tank having the largest such area; or
  • 3 l/min per square metre of the area protected by the largest monitor, such area being entirely forward of the monitor, but not less than 1,250 l/min.

Sufficient foam concentrate shall be supplied to ensure at least 20 min of foam generation in tankers fitted with an inert gas installation or 30 min of foam generation in tankers not fitted with an inert gas installation when using solution rates stipulated in above paragraph , as appropriate, whichever is the greatest. The foam expansion ratio (i.e. the ratio of the volume of foam produced to the volume of the mixture of water and foam making concentrate supplied) shall not generally exceed 12 to 1.

Where systems essentially produce low expansion foam, but an expansion ratio slightly in excess of 12 to 1, the quantity of foam solution available shall be calculated as for 12 to 1 expansion ratio systems.

When medium expansion ratio foam{ (between 50 to 1 and 150 to 1 expansion ratio) is employed, the application rate of the foam and the capacity of a monitor installation shall be to the satisfaction of the Administration.

Monitors and foam applicators

Foam from the fixed foam system shall be supplied by means of monitors and foam applicators. At least 50% of the foam solution supply rate required in  above paragraphs  shall be delivered from each monitor.

You may also know:

On tankers of less than 4,000 tonnes deadweight the Administration may not require installation of monitors but only applicators. However, in such a case the capacity of each applicator shall be at least 25% of the foam solution supply rate required in Paragraphs above .

 The capacity of any monitor shall be at least 3 l/min of foam solution per square metre of deck area protected by that monitor, such area being entirely forward of the monitor. Such capacity shall be not less than 1,250 l/min. The capacity of any applicator shall be not less than 400 l/min and the applicator throw in still air conditions shall be not less than 15 m.

Points  to pounder :
  1. The arrangements for providing foam shall be capable of delivering foam to the entire cargo tanks deck area as well as into any cargo tank the deck of which has been ruptured.
  2. The deck foam system shall be capable of simple and rapid operation.
  3. Operation of a deck foam system at its required output shall permit the simultaneous use of the minimum required number of jets of water at the required pressure from the fire main.

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From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses) From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses) From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses) From Marine Enclyopedia to MARINE GYAAN ACADEMY in Lucknow - Preparing YOUTH to become SEAFARERS ( for IMU-CET and various courses)