Permeability i.e. leakage inspection method for liquid or gas pipelines, involves using manometer for measuring temperature-dependent pressure change of liquid or gas in pipeline

摘要

A manometer (4) is arranged near the pipeline carrying gas or liquid such as water, and the pressure change of the liquid or gaseous medium in response to the change in temperature, is measured. An independent claim is also included for permeability i.e. leakage inspection device.