Flexible Line High Temperature Exposure Test is a test to determine the maximum temperature that a flexible choke and kill line would withstand. This test also called Survival Test because both the line structure and the end terminations are exposed to high temperature excursions representing severe, survival conditions. Similarly to previous tests, it is carried out in the protecting tube because in the end the flexible line shall be heated from the inside until it bursts or starts to leak. Once the flexible line is assembled and in the protecting tube its pressurized with water to reach the manufacturer’s rated working pressure. The working pressure is 345 to 1380 bar, depending on the pressure rating of the flexible line. Then the heating of the flexible line can start with a rate not exeeding 2,8 C° per hour to 177 C° and held for one hour. At that point if there is no pressure drop or fluid leak, the test is positive. After this, it is to determine the maximum temperature the line can withstand on working pressure by raising the temperature at a rate not exceeding 2,8 C° per hour until faliure.
Flexible line test station