A Pipe Size library contains the acceptable pipe sizes that will be used by the pipe autosize calculations. Libraries can be saved as .XPPIPX files so that they can be shared/reused.
By selecting this option you will be able to edit / create a pipe size library. Simply enter the required pipe diameters in the spreadsheet. The values must be in ascending order of size and note that if the largest pipe in the file is not big enough for the flow then the program will continue based on the Additional Increment specified (75 mm by default) until sufficient capacity is reached.
The Default button loads the details of the Standard pipe size library supplied with the software.