Exhaust pipe system

An exhaust pipe system for guiding exhaust gas from a combustion device to an exhaust system, comprising:

• a first exhaust pipe with an inlet end and an outlet end, which is formed such that it can be connected to the exhaust system, and
• a second exhaust pipe having a first line end and a second line end which is formed to be connectable to the combustion device,
• wherein the inlet end of the first exhaust pipe is configured to be connected to the first line end of the second exhaust pipe via a detachable coupling connection,
• wherein a locking member is arranged to be movable between a closed position closing a passage from the inlet end to the outlet end and an open position opening the passage within the first exhaust pipe,
• wherein, when the coupling connection is removed, the locking member is automatically arranged in the closed position, and
• wherein the second exhaust pipe has an actuating member which, when the coupling connection is established, urges the locking member into the open position.