FLUID CONNECTION/HEATING DEVICE, FLUID TRANSFER CIRCUIT INCORPORATING SAID DEVICE, METHOD OF ASSEMBLY OF THE DEVICE AND CIRCUIT

The invention relates to a fluid connection and heating device, to the method of assembly thereof, to a fluid transfer circuit, e.g. "SCR", incorporating said device, and to the method of assembly thereof. This device (1) comprises: - an outer connector (40), inside which the following are formed: * a first axial channel (41) from a first port (O1) of the connector for a fluid that is to be heated, and * a second channel (42) that surrounds said first channel, is intended for a coolant and comprises a radial portion (44) and an axial portion (45) that extends said radial portion as far as a second port (O3) of the connector that is coaxial to the first port; and - an insert (50) that is mounted in the connector and connects the first port to a first pipe (20) via the first and second insert ends (51 and 52) that are adjacent to the first and second ports, the insert defining the first channel and the annular axial portion formed between the insert and a tubular wall (46) of the connector as far as the second port. The insert is mounted by sliding (F) through the second port from an intermediate position to a final position in which the second end of said insert is outside and inside the second port, respectively.