The Minimum Pipe Length Rule for Random Length Pipe node (the MinPipeLengthRule sheet in the Piping Specification.xls workbook) defines the minimum pipe length and the preferred minimum pipe length for piping that is available for purchase in random lengths. You define these minimum lengths based on the nominal piping diameter.
The software assumes that the minimum pipe length value includes any length required to address socket depth for socket weld configurations. For example, you intend to insert pipe stock between two socket weld valves, where the socket depth is ½ inch. The minimum pipe length between the two female hubs is to be 2 inch. You must create the minimum pipe length in this rule as 3 inches, 2 + ½ + ½ = 3.
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.
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.