This video shows how to add new pipe diameters to the pipe database under the available pipe materials. One can either add a completely new size of pipe or expand existing classifications by defining it as needed. To add a new size, one can select the steel pipe menu, click on the add button, and input the required information such as pipe's diameter unit, pressure unit, inside-outside diameter information, and maximum operating pressure. After these steps, the new pipe size is added to the database and accessible in the flow sheet for further work.