The Minimum Pipe Length Rule for Purchase Length Pipe node (the MinPipeLengthPurchasePerSpec sheet in the Piping Specification.xls workbook) defines the minimum pipe length and the preferred minimum pipe length for piping that is only available for purchase in fixed lengths. You define these minimum lengths based on the nominal piping diameter. Use this sheet to override the settings on the Model Rules > Minimum Pipe Length Rule for Purchase Length Pipe rule (MinPipeLengthPurchase sheet) on a per piping materials class basis.

The length information defined here should be considered design rules. The actual minimum length of pipe that can be purchased is defined at the pipe stock part level in the Minimum Pipe Length box (each pipe part has its own minimum pipe length as part of its definition).

Spec Name (Required)

Type the name of the pipe specification for which you are defining valid bend angles. The piping materials class that you enter must be defined on the Piping Materials Classes.

Nominal Piping Diameter (Required)

Type the nominal diameter for which the minimum pipe length applies.

Nominal Piping Diameter Units (Required)

Specify the units for the nominal pipe diameter value you entered in the Nominal Piping Diameter column. For example, type mm or in.

Purchase Length (Required)

Specify the purchase length for the piping for which the minimum pipe length applies.

Minimum Pipe Length (Required)

Type the minimum length for the pipe that you want to allow for this nominal diameter. The software will not let you place pipe shorter than this value. Be sure to include the units, for example, 0.5in or 1.375mm.

Preferred Minimum Pipe Length (Required)

Type the preferred minimum pipe length for this nominal diameter. Be sure to include the units, for example, 0.5in or 1.375mm. The software generates a warning that results in an inconsistency when you place pipe shorter than this value, but does not prevent placement of the pipe.

The value in the Minimum Pipe Length column should be less than the preferred minimum pipe length that you enter here.