Pipe connection arrangement, high-pressure fluid line system of a double internal combustion engine, double internal combustion engine and use of a tension nut

The invention relates to a pipe connection arrangement (1) which is arranged in a high-pressure fluid line system (2) of a double internal combustion engine (3), comprising a first pipe element (4) with an outer sealing cone (6) and with a conical shoulder (7) adjoining said cone, comprising a further pipe element (8) with an inner sealing cone (10) and with an external thread (11), comprising a screw nut element (17) with a clamping sleeve region (31) having an inner clamping cone (20) and with a threaded sleeve region (32) having an internal thread (19), in which the outer sealing cone (6) of the first pipe element (4) is arranged at least partially in the inner sealing cone (10) of the further pipe element (8) and in which the internal thread (19) of the screw nut element (17) is screwed on the external thread (11) of the further pipe element (8), with the result that the inner clamping cone (20) of the screw nut element (17) is pulled against the conical shoulder (7) of the first pipe element (4) in such