BS 7527-2.5:1991

Committees responsible
National foreword
Introduction
Classification
1 Scope
2 Normative references
3 General
4 Natural dust and sand environments
5 Dust and sand in sheltered and enclosed locations
6 Salt mist
Annexes
A Dust and sand concentrations - Examples of high
     concentrations
B Bibliography
Figures
1 Dust and sand particle size cumulative distribution
2 Maximum particle size dependent on wind velocity
3 Occurrence of wind at a moderately windy inland
     site
4 Setting velocities for particles in still air
5 Sea salt distribution over land masses (average
     salt deposition values over the year)
6 Sodium chloride deposition varying with distance
     from the seashore (measured in Africa)
Tables
1 Hardness scale
2 Typical dust and sand concentrations
3 Concentration of dust and sand at increasing
     altitude over deserts
4 Major deserts
5 Typical dust and sand sedimentation intensities
6 Principal constituents of sea-water
A.1 Examples of high dust and sand concentrations

Specifies the characteristics of sand, dust and salt mist appearing in nature, and describes the influences from these environmental factors to which products are liable to be exposed during storage, transportation and use. Although the effect of these factors is often closely associated with and at times enhanced by wind, the environmental factor of wind is not dealt with.

This section of IEC 721-2 presents characteristics of dust, sand and salt mist appearing in nature, and describes the influences from these environmental factors to which products are liable to be exposed during storage, transportation and use. Although the effect of these factors is often closely associated with and at times enhanced by wind, the environmental factor of wind is not dealt with in this section but in IEC 721-2-2.