MEASURING METHOD OF LENGTH OF PIPELINE

摘要

PURPOSE:To obtain a method which achieves a measurement of the length of a pipeline prior to the installation of a cable having a connector mounted at both ends of the cable by inserting the cable through the existing pipeline. CONSTITUTION:A line of float 1 made up of floats 1-1 containing a gas lighter than air in them linked together is supplied to be inserted through a pipeline 3 by a driving means or an air flow from one end of the pipeline 3. The length of the pipeline is measured from the length of the line of float.