FLUID CONVEYING TUBE AND FLUID LEAKAGE DETECTING SYSTEM

摘要

A fluid conveying tube and a fluid leakage detecting system which can convey a very low temperature fluid such as LNG and which can quickly and reliably detect leakage of the fluid inside the tube and the position of the leakage. An optical fiber (17) is continuously wound around a flexible tube (1a) along the entire length thereof. Leakage information detected by an optical fiber temperature sensor (21) is transmitted via a terminal (25a) to an externally mounted temperature measuring device. Also, when similar leakage occurs near a connecting section (3), the pressure of LNG in a corrugated tube (11) and pressure occurring when the LNG evaporates raise gas pressure inside a heat insulating layer (13a). When the pressure in the heat insulating layer (13a) increases, gas pressure change information is transmitted to a terminal (25b) via a tube (27). A tube is connected to the terminal (25b) from the outside, and the tube is connected to a pressure meter.