| abstract |
The invention relates to a flexible tubular pipe comprising an internal tube made of flexible material ensuring sealing, an external protective coating of flexible material, at least one annular zone comprising reinforcing reinforcements between the internal tube and the protective coating. external, and usually an internal metal carcass.n n n It comprises a passage means (6,7,7a; 9) putting said annular zone in communication with the external environment, said means being provided with a rapid opening and closing valve (8) arranged to open and close. close at determined differential pressures in said annular zone. |