Chemical tanker deck unit header area pipeline installation precision control method

The invention discloses a chemical tanker deck unit header area pipeline installation precision control method. The method comprises the following steps that S1, a pipe positioning detection tool is manufactured, and the pipe positioning detection tool is used for detecting the flange surface positions of a transverse upper layer pipeline, a transverse lower layer pipeline and an oil collecting groove pipeline; S2, a transverse upper-layer pipeline, a transverse lower-layer pipeline and an oil collecting tank pipeline are pre-mounted , and precision detection and adjustment are carried out through a pipe positioning detection tool after pre-mounting is completed, and S3, the transverse upper-layer pipeline and the transverse lower-layer pipeline are pre-mounted on the bracket through pipeclamps after the precision meets the requirement, and the transverse upper-layer pipeline, the transverse lower-layer pipeline and the oil collecting tank pipeline are connected through F-shaped pipes. According to the method, the end face degree, the spacing size and levelness of the pipe can be accurately controlled, so the position relation of any three flanges which are adjacent in a triangular shape on the transverse pipeline meets the design requirement, and the situation that the transverse pipeline is not matched with the F-shaped pipe is avoided.