Method for checking pipes or pipe networks for leaks

摘要

A method is provided for leak checking pipes or pipe networks wherein the leak check is effected by means of liquid under pressure in that a pressure change is determined. To improve the leak check by excluding temperature caused pressure changes, the liquid pressure in the pipes, pipe networks or pipe sections thereof is set to at least two different pressure levels as initial pressure for at least one respective pressure change determination. From the time standardized pressure changes associated with different initial pressures, a time standardized pressure change difference is formed and is compared with an allowed value with reference to the unit of time. A leak is determined to exist if the pressure change difference is greater than the allowed value.