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Open the Piping Specification.xls workbook.
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Select the JointQualityFactor sheet.
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Select a row after the Start keyword but before the End keyword, and click Insert > Row.
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In the Spec Name column, type the name of your piping materials class.
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In the Nominal Piping Diameter From column, type the nominal pipe diameter (NPD) that specifies the start of the joint quality factor range.
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In the Nominal Piping Diameter To column, type the NPD that specifies the end of the joint quality factor range.
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In the NPD Unit Type column, type the units for the NPDs. For example, type mm or in.
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In the Joint Quality Factor column, type the joint quality factor, as a percentage, that you want to use for the defined NPD range.
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Save the Piping Specification.xls workbook.
The piping materials class must be defined on the PipingMaterialsClassData sheet.