Chapter 6:

machinery


CHAPTER SUMMARY
Chapter 6 identifies requirements for ensuring that the machinery installations used on board ships operating in Polar Regions are capable of functioning under low temperatures and anticipated environmental conditions. These are clearly set out in the Chapter 6 wording below, and in the Part 1B Additional Guidance.


SUBMISSIONS


CHAPTER 6 –  MACHINERY INSTALLATIONS:
Full Polar Code text
As adopted from IMO - Full Polar Code text

6.1 Goal
The goal of this chapter is to ensure that, machinery installations are capable of delivering the required functionality necessary for safe operation of ships.

6.2 Functional requirements
6.2.1 In order to achieve the goal set out in paragraph 6.1 above, the following functional requirements are embodied in the regulations of this chapter.
  • 6.2.1.1 Machinery installations shall provide functionality under the anticipated environmental conditions, taking into account:
    • .1 ice accretion and/or snow accumulation;
    • .2 ice ingestion from seawater;
    • .3 freezing and increased viscosity of liquids;
    • .4 seawater intake temperature; and
    • .5 snow ingestion.
  • 6.2.1.2 In addition, for ships intended to operate in low air temperatures:
    • .1 machinery installations shall provide functionality under the anticipated environmental conditions, also taking into account:
      • .1 cold and dense inlet air; and
      • .2 loss of performance of battery or other stored energy device; and
    • .2 materials used shall be suitable for operation at the ships polar service temperature.
  • 6.2.1.3 In addition, for ships ice strengthened in accordance with chapter 3, machinery installations shall provide functionality under the anticipated environmental conditions, taking into account loads imposed directly by ice interaction.
6.3 Regulations
6.3.1 In order to comply with the functional requirement of paragraph 6.2.1.1 above, taking into account the anticipated environmental conditions, the following apply:
  • .1 machinery installations and associated equipment shall be protected against the effect of ice accretion and/or snow accumulation, ice ingestion from sea water, freezing and increased viscosity of liquids, seawater intake temperature and snow ingestion;
  • .2 working liquids shall be maintained in a viscosity range that ensures operation of the machinery; and
  • .3 seawater supplies for machinery systems shall be designed to prevent ingestion of ice, or otherwise arranged to ensure functionality.
6.3.2 In addition, for ships intended to operate in low air temperatures, the following apply:
  • .1 in order to comply with the functional requirement of paragraph 6.2.1.2 above, exposed machinery and electrical installation and appliances shall function at the polar service temperature;
  • .2 in order to comply with the functional requirement of paragraph 6.2.1.2.1 above, means shall be provided to ensure that combustion air for internal combustion engines driving essential machinery is maintained at a temperature in compliance with the criteria provided by the engine manufacturer; and
  • .3 in order to comply with the functional requirements of paragraph 6.2.1.2.2 above, materials of exposed machinery and foundations shall be approved by the Administration, or a recognized organization accepted by it, taking into account standards acceptable to the Organization, 11 or other standards offering an equivalent level of safety based on the polar service temperature.
6.3.3 In addition, for ships ice strengthened in accordance with chapter 3, in order to comply with the functional requirements of paragraph 6.2.1.3 above, the following apply:
  • .1 scantlings of propeller blades, propulsion line, steering equipment and other appendages of category A ships shall be approved by the Administration, or a recognized organization accepted by it, taking into account standards acceptable to the Organization10or other standards offering an equivalent level of safety;
  • .2 scantlings of propeller blades, propulsion line, steering equipment and other appendages of category B ships shall be approved by the Administration, or a recognized organization accepted by it, taking into account standards acceptable to the Organization11 or other standards offering an equivalent level of safety; and
  • .3 scantlings of propeller blades, propulsion line, steering equipment and other appendages of ice-strengthened category C ships shall be approved by the Administration, or a recognized organization accepted by it, taking into account acceptable standards adequate with the ice types and concentration encountered in the area of operation.


administration1   participants1
 


POLAR CODE CHAPTERS:
EXPLANATION AND SUBMISSIONS





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