The invention discloses a design method for reference lines for mounting an outfitting
piping system in an inverse segment of a cabin surface. The method comprises the following steps: the first step, establishing a three-dimensional reference, the intersection point of a shipboard side wall and the bow of a
deck, and the intersection point of the shipboard side wall and a
stern of the
deck serve as the first management reference point a and the second management reference point b separately, and the intersection point of a
cross wall and the midship of the
deck serves as the third management reference point c; the second step, drawing
waterline marks, drawing deck minus 1000mm
waterline marks on the shipboard side wall, the
cross wall and a longitudinal bulkhead by using a gradienter; the third step, based on the segment standard three-dimensional measurement data report, drawing corresponding half-width reference lines from the shipboard side wall to the midship by 200mm and 10m straight thatching line auxiliary reference lines on the framework surface of the deck, and drawing bow-end and
stern-end frame plus or minus 200mm end reference lines on the corresponding positions. By adopting the design method, the outfitting
piping system can be highly precisely mounted in the segment of the cabin, and the purposes of cancelling joining and correcting pipes on site are realized for most of the segments. The design method is high in precision and the
piping system can be highly precisely mounted in the segment of the cabin.