公开(公告)号：US20220034453A1

公开(公告)日：2022-02-03

申请号：US17311828

申请日：2019-12-19

Applicant: GAZTRANSPORT ET TECHNIGAZ

Inventor： Maxime CHAMPAGNAC ,  Pierre JOLIV ,  Mathieu PETITPAS ,  Mael BLEOMEL ,  Damlen BRENAC ,  Laurent SPITTAEL ,  Vincent BRIATTE ,  Julien GLORY

IPC: F17C3/02 ,  F17C13/02 ,  G01M3/00 ,  G01M3/22

Abstract: A method for checking the sealing of a sealed tank for storing a liquefied gas at low temperature, the tank having an inner hull and a secondary sealing membrane, a secondary space that is arranged between the inner hull and the secondary sealing membrane, a primary sealing membrane and a primary space that is arranged between the primary sealing membrane and the secondary sealing membrane is disclosed. The method has the following main steps: generating a pressure lower than the pressure of the primary space in the secondary space using a suction device, measuring the temperature of an outer surface of the inner hull, and detecting the location of a sealing defect of the secondary sealing membrane in the form of a cold spot on the outer surface of the inner hull.