To improve the technology of ship piping systems at the design stage is an actual problem. The authors have analyzed technological features of manufacturing ship piping systems and have also considered the current state of design, manufacture and installation of ship pipeline issues. The review of research in the field of compensation of deviations of pipeline routes is presented. The problem of improving technology of ship piping systems at the design stage is considered providing the possibility of manufacturing pipes without removing dimensions in place. The authors have proposed the solution for the issue within studies of relationship of configuration and compensatory possibilities of pipeline routes. The authors are suggesting the idea of using straight pipes for moving the pipeline route to compensate for errors in the manufacture of pipes and the installation of tightly fixed connections of equipment, saturation products, etc., which ensures collecting the route without changing configuration of ready-made pipes. The proposed development allows to control and reduce at the design stage possible deviations that occur in the manufacture of pipes, to minimize the gaps assigned to the tracing of pipelines. The authors have reached the following research outcomes: mathematical description of the compensation capabilities of pipeline routes by using straight pipes; 3D models of compensation area are constructed; the necessary condition for full compensation of deviations, without the use of measure pipes lies in the presence in the track of two pairs of straight pipes with non-planar directions. The theoretical basis for designing an automated program has been developed that will allow determining the areas of compensatory opportunities for pipeline routes. The authors proposed the idea of replacing bottom pipes for the pipes supplied, which helps to reduce the time for constructing ships.
The article highlights the method of the ship systems pipelines manufacturing according to the drawings, regardless of the readiness of the object under construction. There has been emphasized the effectiveness of the method, which resulted in the reduced construction time of the vessel without additional operations, except for design work. The study aimed to eliminate the reasons limiting the application of the manufacturing method based on the design information, regardless of the readiness of the object under construction has been carried out. A scientific approach to determining the clearances sufficient for mounting pipelines, where the pipes are manufactured according to design dimensions, is presented. The sizes of tolerances and the reasons for setting them are analyzed and the measures on reducing or eliminating them are proposed. There is given the estimation of gaps big enough to fit any pipeline canal under consideration into the allocated corridors. The analysis of route deviations under mounting the ship pipeline systems at the design stage makes it possible to reduce the assigned clearances and to manufacture the pipes into the reserve later. The calculation and methodological base used in the design of pipeline routes for ship systems has been developed. The software AST-SUDOTRUB was developed to calculate the pipeline deviations that occur due to the errors in pipe manufacturing. The software automatically checks the sufficiency of controlled gaps in a particular point of the route studying the pipe deviation in the gap area. The study results prove the need to indicate the date of the start of routing in calculations and give the designer a tool for rational assigning the gaps
The influence of design routing on the possibility of assembling pipelines of ship systems is considered. As a result, it is planned to manufacture pipes for the backlog, ensuring successful installation to reduce the labor intensity of pipeline work and shorten the construction time of the vessel as a whole. To exclude deviations during the installation of ship pipelines systems, it is proposed to use direct pipes made with an admissible mixing and connection. According to the proposed approach, in which the joints are not installed perpendicular to the pipe axis, but mutually parallel, a line consisting only of straight pipes (or having straight sections in its composition) can be moved to eliminate possible deviations of rigidly fixed joints by the actually required value. The process of excluding pipeline deviations when using straight pipes made with an allowable offset of mutual arrangement of joints and pipe turning is simulated.
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