1. Insulated equipment
Equipment of which the body2) In the case of tank equipment, the term “body” means, under this definition, the tank itself.is 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 - characterized by a K coefficient equal to or less than 0.70 W/m2.K
IR: heavily insulated equipment characterized by:
a K-coefficient equal to or less than 0.40 W/m2.K;
a wall thickness of at least 45 mm in the case of transport equipment wider than 2.50 m.
However, this second condition is not required for the transport equipment designed before the date of entry into force of this amendment and manufactured before that date or during the period of three years following that date'.
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.
with the aid of appropriate refrigerants and fittings. Such equipment shall comprise 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 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:
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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.
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Class B.
Mechanically refrigerated equipment fitted with a refrigerating appliance such that t1 may be chosen between +12°C and –10°C inclusive.
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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.
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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 fitted with a heat-producing appliance which is capable of raising the temperature inside 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 of the body is that indicated below for the two classes:
The K coefficient of equipment of class B shall in every case be equal to or less than 0.40 W/m2.K.
5. Transitional provisions
For a period of 3 years following the date of entry into force of this Agreement in conformity with the provisions of article 11, paragraph 1 thereof, the overall coefficient of heat transfer (K coefficient) may, in the case of equipment already in service at that date, be equal to or less than
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0,90 W/m2.K
in the case of insulated equipment in category In, refrigerated equipment in class A, all mechanically refrigerated equipment, and heated equipment in class A; and
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0,60 W/m2.K
in the case of refrigerated equipment in classes B and C and heated equipment in class B.
Moreover, after the period of 3 years referred to in the first subparagraph of this paragraph and until the equipment is finally withdrawn from service, the K coefficient of the mechanically refrigerated equipment in question of classes B, C, E and F may be equal to or less than 0.70 W/m2.K.
These transitional provisions shall not, however, preclude the application of any stricter regulations enacted by certain States for equipment registered in their own territory.