Piping models distributed pipelines in the model using a point-by-point design method. You can also insert piping components, instruments, and splits during design, and then to spool the pipe. Modeling of pipelines is aided by the piping specification, which limits and sometimes automatically selects piping parts. The piping specification contains a grouping of piping materials classes that define the requirements, characteristics, and behavior of the piping commodities for a specific service.