Control method for installation precision of piping system unit

The invention relates to the technical field of pipe system unit precision detection, and discloses a pipe system unit installation precision control method, which is characterized by comprising the following steps of: drawing a datum line in a site according to a design drawing; marking the X and Y coordinates of each reference tube according to the reference line, and then mounting the reference tubes according to the height coordinates of the corresponding reference tubes; detecting the position of the reference tube; fixing the reference tube; installing a connecting pipe connected with the reference pipe according to the position of the reference pipe; and the other pipe fittings connected with the connecting pipe are installed, and if the pipe fittings which cannot be connected are found, the pipe fittings are rectified under the condition that it is guaranteed that the reference pipe and the connecting pipe are not moved. The operability of precision control is high, the measurement difficulty is low,