IEC 60721-3-2:1997 pdf download.Classification of environmental conditions – Part 3: Classification of groups of environmental parameters and their severities – Section 2: Transportation
1 Scope and object
This section of IEC 60721 -3 classifies the groups of environmental parameters and their
severities to which a product is subjected while being transported from one place to another
after being made ready for dispatch from the manufacturing factory.
The most commonly used methods of transportation have been taken into account, including
the following:
road transport: cars, lorries, trucks, animals, conveyors;
rail transport: trains, trams, conveyors;
water transport, inland and maritime: ships, hovercraft, conveyors;
air transport: aircraft, conveyors;
vertical transport: cranes, transport lifts, cableways.
The environmental conditions specified in this section are those met by the product being
transported. If the product is packed, the environmental conditions apply to the package
containing the product. Only severe conditions, which may be harmful to products, are
included.
Conditions for storage and use are given in other sections of IEC 721 -3.
The object of this standard is to classify groups of environmental parameters and their
severities to which a product will be exposed when being transported on ground, water and in
air, including loading and unloading.
A limited number of classes of environmental conditions are given, covering a broad field
of application. The user of this standard should select the lowest classes necessary covering
each of the conditions of the intended transportation. Some guidance for this is given in
annex A.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 721 -3. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC 721 -3 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 721 -1 : 1 990, Classification of environmental conditions Part 1 : Environmental
parameters and their severities Amendment 1 (1 992) Amendment 2 (1 995)
IEC 721 -2-1 : 1 982, Classification of environmental conditions Part 2: Environmental
conditions appearing in nature Temperature and humidity Amendment 1 (1 987)
IEC 721 -3-0: 1 984, Classification of environmental conditions Part 3: Classification of groups
of environmental parameters and their severities Introduction Amendment 1 (1 987)
3 Definitions
For the purpose of the present section of IEC 721 -3, the following definitions apply, in addition
to the definitions in clause 3 of IEC 721 -1 .
3.1 weatherprotected: The product, packed or unpacked, is contained within an enclosure
which affords some protection from the environment, ranging from a temperature controlled
container to a waterproof cover placed over the product. Ventilation ranges from controlled air
flow to the raising of part of a waterproof cover to allow for natural air flow.
3.2 non-weatherprotected: The product, packed or unpacked, is not protected in any way
from the environment.
4 General
Reference to IEC 721 -3-0 is strongly recommended in order to avoid misuse of the classes
defined in other sections of IEC 721 -3.
The severities specified are those which will have a low probability of being exceeded. All
specified values are maximum or limit values. These values may be reached, but do not occur
permanently. Depending on the situation, there may be different frequencies of occurrence
related to a certain period of time. Such frequencies of occurrence have not yet been included
in this standard, but should be considered for any environmental parameter. They should
additionally be specified, if applicable.Information on the duration and frequency of occurrence is given, as clause 6, in amendment 1
to IEC 721 -3-0.
Attention is drawn to the fact that combinations of the environmental parameters given may
increase the effect on a product. This applies especially to the presence of high relative
humidity in addition to biological conditions, or to conditions of chemically or mechanically
active substances.
IEC 60721-3-2:1997 pdf download
