GB/T 40475-2021Technical requirements for lectotype of refrigerated and insulated vehicles (English PDF)

3.1 Refrigerated and insulated vehicles

Cargo transportation vehicles that are equipped with temperature-regulating equipment and compartments with the function of maintaining a predetermined temperature range, including refrigerated-and-insulated trucks and refrigerated-and-insulated trailers.

3.2 Cooling capacity

When the refrigeration unit is in cooling operation, the total amount of heat removed from the confined space and area per unit time under specified conditions.

Note: The unit is watt (W).

3.3 Cargo hold

The compartment unit that can carry cargo on a refrigerated and insulated vehicle.

6.1 Material requirements for the compartment

6.1.1 The space between the inner and outer panels of the compartment panels shall be filled with thermal insulation materials with low water absorption, low air permeability, low thermal conductivity, good corrosion resistance and flame retardancy. The thermal insulation materials should be environmentally friendly and recyclable. The flame retardancy shall be in accordance with the requirements of GB 8624. The thermal insulation material shall have good temperature stability, and its water absorption, air permeability, and anti-corrosion properties shall not be reduced when used at an ambient temperature of -50 °C~70 °C.

6.1.2 The plates used as the inner and outer panels of the compartment panels shall be made of impermeable, easy-to-clean, rust-proof, and anti-corrosion materials.

6.1.3 The door of the compartment shall be made of impermeable, easy-to-clean, and sturdy material.

6.1.4 Light-colored materials such as white, silver, and light cyan should be used for the outer surface of the compartment.

6.2 Requirements for the leak-proofness of the compartment

6.2.1 The compartment shall have good waterproofness, and there shall be no leakage at the top, side walls, compartment doors, and the connection between the refrigeration unit and the compartment panel.

6.2.2 The compartment shall have drainage holes whose diameters shall be less than 35 mm. For refrigerated and insulated trucks engaged in international road transportation, protective devices that meet the following requirements shall be installed at the ends of the drainage holes:

--- When using a metal plate for protection, the thickness of the metal plate shall be greater than or equal to 1 mm, and the aperture of the metal plate shall be less than or equal to 3 mm;

--- When using a metal net, or a metal plate with the thickness less than 1 mm for protection, the aperture of the metal net or the metal plate shall not be greater than 3 mm, and a metal grille with an aperture of no more than 10 mm shall be used outside the metal mesh or the metal plate for protection.

6.2.3 The door seal (gasket) of the compartment door shall be well sealed; a special device with an air pressure balance function should be installed and used, and the door opening (operation) shall be convenient and reliable.

6.3 Requirements for air circulation in the compartment

6.3.1 The compartment shall have a good cold air circulation system. For refrigerated and insulated trucks with an internal length of greater than 8000 mm, from the cold air outlet of the refrigeration unit, cold air diversion devices should be installed on the top, side walls, and floor of the compartment. The refrigerated and insulated trucks for transporting biological products shall be equipped with diversion grooves in the compartment and the depth of the diversion grooves shall be as follows: on the side walls, rear wall and floor, they shall be greater than or equal to 50 mm; on the front wall, they shall be greater than or equal to 100 mm. For other refrigerated and insulated trucks, the internal floors, side walls, front and rear walls of the compartment should be installed with diversion grooves.

6.3.2 The loading height limit line shall be marked inside the compartment, and the height of the limit line shall not be higher than the lower edge of the air-conditioning outlet of the refrigeration unit.

6.3.3 When the vehicle is fully loaded, the temperature difference between the temperature measurement points in the compartment shall be within ±2 °C.

6.3.4 The maximum size of the vents of refrigerated and insulated vehicles shall be less than 400 mm. For refrigerated and insulated vehicles engaged in international road transportation, the protective devices that meet the following requirements shall be installed at the ends of the vents:

--- When using a metal grid, the aperture of the grid shall be less than or equal to 20 mm; […]

7.2 Driving temperature recorder

7.2.1 The refrigerated and insulated vehicle shall be installed with a driving temperature recorder that meets the requirements of JT/T 1325. The driving temperature recorder shall be fixed and reliable, and its display device shall be installed in a position where the driver can easily see it.

7.2.2 At least 2 temperature sensors shall be installed on the vehicles with the length of the compartment or cargo hold less than or equal to 6000 mm; one shall be installed directly below the air return port of the refrigeration unit and 30 mm~100 mm above the loading height limit line; the other shall be installed at the top of the rear wall of the compartment, in the horizontal middle position, and its longitudinal distance from the inside of the rear door shall be less than 800 mm.

7.2.3 At least 3 temperature sensors shall be installed on the vehicles with the length of the compartment or cargo hold greater than 6000 mm and less than or equal to 9600 mm. The first one shall be installed directly below the air return port of the refrigeration unit and 30 mm~100 mm above the loading height limit line; the second one shall be installed at the top of the compartment, in the horizontal middle position and 1/2 of the longitudinal distance of the compartment; the third one shall be installed at the top of the rear wall of the compartment, in the horizontal middle position, and its longitudinal distance from the inside of the rear door shall be less than 800 mm.

7.2.4 At least 4 temperature sensors shall be installed on the vehicles with a compartment or cargo hold longer than 9600 mm. The first one shall be installed directly below the air return port of the refrigeration unit and 30 mm~100 mm above the loading height limit line; the second one shall be installed at the top of the compartment, in the horizontal middle position, and its distance from the compartment's front part shall be 1/3 of the longitudinal length of the compartment; the third shall be installed at the top of the compartment, in the horizontal middle position, and its distance from the compartment's front part shall be 2/3 of the longitudinal length of the compartment; the fourth shall be installed at the top of the rear wall of the compartment, in the horizontal middle position, and its longitudinal distance from the inside of the rear door shall be less than 800 mm.

7.2.5 The installation of the temperature sensor of the refrigerated and insulated vehicle using a cold air diversion device equipped on the top of the compartment shall meet the following requirements:

--- The installation position and quantity on the front and rear walls of the compartment shall comply with the provisions of 7.2.3 and 7.2.4;

--- The temperature sensors at other positions shall be installed in symmetrical positions on the left and right sides of the compartment.

7.2.6 The driving temperature recorder and its sensors shall be subject to metrological verification/calibration as required.

7.3 Requirements for heating devices

The refrigerated and insulated trucks used in cold areas also shall be equipped with the heating function and able to meet the temperature requirements for transporting goods.

7.4 Requirements for non-mechanical refrigeration units

The non-mechanical refrigeration device shall be reliable, durable and able to reach the corresponding temperature level of the refrigerated truck and achieve the effect of refrigerated transportation. According to the actual structural needs, the load capacity utilization coefficient shall be greater than or equal to 95% of similar vehicles.

7.5 Others

7.5.1 Meat-hanging slides and hooks shall be pre-installed on the top of the compartment for chilled meat refrigerated and insulated trucks. For other special refrigerated and insulated trucks, cargo bolting devices should be installed in the compartment. Applicable standard brackets, hooks and other devices should be selected according to the type of cargo.

7.5.2 The refrigerated and insulated vehicle should be equipped with devices that facilitate the loading, unloading, and protection of goods, such as standardized unit load devices, and lifting tail plates for vehicles.

7.5.3 The rear doors and side doors of refrigerated and insulated vehicles for transporting biological products shall be equipped with air isolation devices, which should be made of thick canvas materials; other refrigerated and insulated vehicles should be installed with this device.