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In the tree view, click Piping > Piping Specification > Model Rules > Minimum Pipe Length Rule for Random Length Pipe.
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Click the Insert Row Command to insert a blank row in the grid view.
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In the Nominal Piping Diameter column, type the nominal pipe diameter for which you are defining minimum values.
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In the Nominal Piping Diameter Units column, type the units for the NPD. For example, type mm or in.
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In the Minimum Pipe Length column, type the minimum pipe length that you will allow for the specified NPD.
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In the Preferred Minimum Pipe Length column, type your preferred minimum pipe length for the specified NPD.
The Minimum Pipe Length Rule sheet in the Piping Specification.xls workbook corresponds to the Minimum Pipe Length Rule for Random Length Pipe node. See Piping Reference Data.