Air duct is a pipe system to transmit the air between the air-conditioner host to the air outlets on the train.

Railway vehicle’s air duct normally adopts aluminum bended into shape, cooperated with riveting and gluing sealing. The air duct surfaces are covered with thermal insulation materials. The installation brackets are designed to connect with the car body.

The connection of air duct’s parts adopts sealing riveting, and the connecting parts are sealed by special sealing material, to ensure no any air leakage. The riveting connection must be with enough strength, to ensure that the air duct have no abnormal shape and to reduce the air resistance. The welding process complies with relevant requirements of TB / T 3259-2011.