1. Insulated equipment
Equipment of which the bodyis built with insulating walls, doors, floor and roof, by which heat exchanges between
the inside and outside of the body can be so limited that the overall coefficient
of heat transfer (K coefficient), is such that the equipment is assignable to one
or other of the following two categories:
IN = Normally insulated equipment - specified by a K coefficient equal to or less than 0.70 W/m2.K
IR: heavily insulated equipment specified by:
a K-coefficient equal to or less than 0.40 W/m2.K and by a side-walls thickness of at least 45 mm in the case of transport equipment
wider than 2.50 m.
The definition of the K coefficient and a description of the method to be used in
measuring it, are given in appendix 2 to this annex.
2. Refrigerated equipment.
Insulated equipment which, using a source of cold (natural ice, with or without the
addition of salt; eutectic plates; dry ice, with or without sublimation control; liquefied
gases, with or without evaporation control; etc.) other than a mechanical or “absorption”
unit, is capable, with a mean outside temperature of +30°C, of lowering the temperature
inside the empty body to, and thereafter maintaining it:
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– At +7°C maximum in the case of class A;
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– At -10°C maximum in the case of class B;
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– At -20°C maximum in the case of class C; and
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– At 0°C maximum in the case of class D.
If such equipment includes one or more compartments, receptacles or tanks for the
refrigerant. The said compartments, receptacles or tanks shall:
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– be capable of being filled or refilled from the outside; and
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– have a capacity in conformity with the provisions of annex 1, appendix 2, paragraph
34.
The K coefficient of refrigerated equipment of classes B and C shall in every case
be equal to or less than 0.40 W/m2.K.
3. Mechanically refrigerated equipment
Insulated equipment either fitted with its own refrigerating appliance, or served
jointly with other units of transport equipment by such an appliance, (mechanical
compressor unit, “absorption” unit, etc.). The appliance shall be capable, with a
mean outside temperature of +30°C, of lowering the temperature inside the empty body
to, and thereafter maintaining it continuously in the following manner at:
-
- In the case of classes A, B and C, any desired practically constant value t1 in conformity with the standards defined below for the three classes:
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Class A.
Mechanically refrigerated equipment fitted with a refrigerating appliance such that
t1 may be chosen between +12°C and 0°C inclusive.
-
Class B.
Mechanically refrigerated equipment fitted with a refrigerating appliance such that
t1 may be chosen between +12°C and –10°C inclusive.
-
Class C.
Mechanically refrigerated equipment fitted with a refrigerating appliance such that
t1 may be chosen between +12°C and –20°C inclusive.
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- In the case of classes D, E and F a fixed practically constant value t1 in conformity with the standards defined below for the three classes:
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Class D.
Mechanically refrigerated equipment fitted with a refrigerating appliance such that
t1 is equal to or less than 0°C.
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Class E.
Mechanically refrigerated equipment fitted with a refrigerating appliance such that
t1 is equal to or less than –10°C.
-
Class F.
Mechanically refrigerated equipment fitted with a refrigerating appliance such that
t1 is equal to or less than –20°C.
The K coefficient of equipment of classes B, C, E and F shall in every case be equal
to or less than 0.40 W/m2.K.
4. Heated equipment.
Insulated equipment, which is capable of raising the inside temperature of the empty
body to, and thereafter maintaining it for not less than 12 hours without renewal
of supply at, a practically constant value of not less than + 12 °C when the mean
outside temperature, as indicated below:
The K coefficient of equipment of class B shall in every case be equal to or less
than 0.40 W/m2.K.