Insulated wagon

Covered wagon, the body of which is built with insulating walls, doors, floor and roof, to limit heat exchange between the interior of the wagon and the outside, so that the overall coefficient of heat transfer (K coefficient) allows the equipment to be assigned to one or the other of the following two categories: - IN = normally insulated, characterised by a K coefficient equal to or less than 0.7 W/m2°C; - IR = heavily insulated, characterised by a K coefficient equal to or less than 0.4 W/m2°C. An insulated wagon is commonly used to transport perishable freight (meat, fish, oil, vegetables, fruit, etc.). There are two primary types of insulated wagons: refrigerated wagons (using water ice or salt ice and heating by temporary ovens) (see A.II-19.1) and mechanically refrigerated wagons (with mechanical refrigeration and electric heating) (see A.II-19.2) depending on the refrigeration and heating methods. Also referred to as ‘insulated car’