Flow Moisture Point

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The Flow Moisture Point (FMP), or flow point, is a moisture content (reported in gross water content by weight) determined in two of the three TML test methods stated in Appendix 2 of the International Maritime Solid Bulk Cargoes Code (IMSBC Code). The Flow Table Test and Penetration Test use the FMP to calculate the Transportable Moisture Limit (TML) of a Group A or liquefiable solid bulk cargo.[1]. Once past the FMP a sample is said to have reached its flow state.

See Also: Identification of a Flow State

Flow Table Test (FTT)[edit]

During the Flow Table Test procedure described in Appendix 2 of the International Maritime Solid Bulk Cargoes Code (IMSBC Code), the FMP is calculated as the average gross water content by weight of the two samples on the flow table, one which shows plastic deformation (above FMP) and one which does not show plastic deformation (below FMP). These two samples must have a maximum difference of 0.5% gross water content by weight to be valid.

See: Flow Table Test,

Equation[edit]

The following equation is derived from the equations given in Appendix 2 of the International Maritime Solid Bulk Cargoes Code (IMSBC Code) which are used to calculate the FMP during the Flow Table Test:

FMPequation.gif

Where:

m1 = mass of wet sample just above the Flow Moisture Point (FMP),
m2 = mass of dry sample just above the Flow Moisture Point (FMP),
m3 = mass of wet sample just below the Flow Moisture Point (FMP) and
m4 = mass of dry sample just below the Flow Moisture Point (FMP).

Penetration Test (PT)[edit]

During the Penetration Test procedure described in Appendix 2 of the International Maritime Solid Bulk Cargoes Code (IMSBC Code), the FMP is calculated as the average gross water content by weight of the two samples in the Penetration Test mould, one which shows penetration by the relevant penetration bit greater than 50 mm (above FMP) and one which does not show penetration by the relevant penetration bit greater than 50 mm (below FMP). These two samples must have a maximum difference of 0.5% gross water content by weight to be valid.

See: Penetration Test

Equation[edit]

The same equation that is used to determine the FMP during the Flow Table Test is used during the Penetration Test.

References[edit]

  1. International Maritime Organisation, International Maritime Solid Bulk Cargoes Code, 2013 Edition, London: International Maritime Organization.

See Also[edit]

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