The present invention relates to a main and accompanying
pipe for improving steam in a ship, comprising a main and accompanying
pipe, one end of the main and accompanying
pipe is fixedly connected with a
flange, the outer side of the
flange is provided with a fixing groove, a
ferrule joint is placed on the inner wall of the fixing groove, the outer wall of the
ferrule joint matches the inner wall of the fixing groove, one end of the
ferrule joint is fixedly connected with a fixing hole, the other end of the ferrule joint is fixedly connected with a fixing piece, the outer wall of the main and accompanying pipe is fixedly connected with a protective pipe, the inner wall of the protective pipe is fixedly connected with a
thermal insulation layer, and the inner wall of the
thermal insulation layer is fixedly connected with a connecting layer. The main and accompanying pipe are wrapped around the outer wall of an equipment pipeline, and the equipment pipeline is fixed by using a fixing belt, the fixing belt is inserted into the inner wall of the fixing groove after being wrapped around the equipment pipeline, a positioning pin is inserted into the fixing hole, the fixing belt is positioned, and the main and accompanying pipe are positioned and fixed by inserting the connecting belt into the inner wall of the positioning groove, thereby facilitating the fixing of equipment pipelines of different sizes.