A method for determining a replacement necessity moment of a pipe of an industrial pipeline, in which method - a time between successive measurings of a wall thickness of a pipe to be measured is determined - a measuring device for the wall thickness of the pipe is started and - the wall thickness of the pipe is measured with the measuring device at determined time intervals, characterised in that in the method - the measuring device sends a measuring result regarding the wall thickness of the pipe to a gateway , the sending of which result simultaneously starts a measuring delay, after the expiry of which the measuring device performs the next measuring of the pipe's wall thickness - the gateway sends the measuring result regarding the wall thickness of the pipe to a measuring server - the measuring server receives and stores the measuring result of the pipe wall thickness and that - the measuring server determines if the measuring result of the wall thickness is smaller than a pre-set alarm thickness for the pipe , and if - the measuring result of the pipe falls below the set alarm thickness, the measuring server sends a notification regarding the replacement necessity of the pipe and simultaneously stores the measured wall thickness of the pipe in a database and checks , if a suggestion for the material and dimensions of a replacement pipe is made in connection with the replacement necessity of the pipe , or if - the measuring result of the pipe exceeds the set alarm thickness, the measuring server stores the measured wall thickness of the pipe in the database . - a time between successive measurings of a wall thickness of a pipe to be measured is determined - a measuring device for the wall thickness of the pipe is started and - the wall thickness of the pipe is measured with the measuring device at determined time intervals, - the measuring device sends a measuring result regarding the wall thickness of the pipe to a gateway , the sending of which result simultaneously starts a measuring delay, after the expiry of which the measuring device performs the next measuring of the pipe's wall thickness - the gateway sends the measuring result regarding the wall thickness of the pipe to a measuring server - the measuring server receives and stores the measuring result of the pipe wall thickness and that - the measuring server determines if the measuring result of the wall thickness is smaller than a pre-set alarm thickness for the pipe , and if - the measuring result of the pipe falls below the set alarm thickness, the measuring server sends a notification regarding the replacement necessity of the pipe and simultaneously stores the measured wall thickness of the pipe in a database and checks , if a suggestion for the material and dimensions of a replacement pipe is made in connection with the replacement necessity of the pipe , or if - the measuring result of the pipe exceeds the set alarm thickness, the measuring server stores the measured wall thickness of the pipe in the database . - the measuring result of the pipe falls below the set alarm thickness, the measuring server sends a notification regarding the replacement necessity of the pipe and simultaneously stores the measured wall thickness of the pipe in a database and checks , if a suggestion for the material and dimensions of a replacement pipe is made in connection with the replacement necessity of the pipe , or if - the measuring result of the pipe exceeds the set alarm thickness, the measuring server stores the measured wall thickness of the pipe in the database . <EOS>