| 摘要 |
This process is characterised in that: - at least on certain points 6 on its length, there is carried out at least one of the methods ensuring respectively the conductibility and the mechanical strength of an electric circuit 43, 44, 45. - when the pipe 1 is used, in the event of a leak, by the active fluid 21 which escapes at the point of leakage 5 and which attacks the aforesaid material 7 which it meets first, on at least one circuit 43, 44, 45 of the line 4 the destruction of this material 7 is caused and at least one break point 60 in the electrical conductibility of this circuit 43, 44, 45 is created, and - at any place 41, 42 where the circuit is accessible a remotely detectable signal 411, 421 is sent into at least one of the lengths delimited by the breaking of the circuit. Application to the surveillance equipment industry. <IMAGE>
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