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In the tree view, click Piping > Piping Specification > Piping Materials Classes.
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In the Piping Materials Classes branch, open a specification and click Piping Materials Class Rules > Field Lining Thickness Rule.
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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 From column, type the lower boundary for nominal pipe diameter.
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In the Nominal Piping Diameter To column, type the upper boundary for nominal pipe diameter.
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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 Liner Thickness Inside Diameter column, enter the thickness of the lining material at the inside diameter of field-lined fittings.
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In the Liner Thickness on Face of Flange column, enter the thickness of the lining material at the face of the flange at any field-lined bolted fittings.
The Field Lining Thickness sheet in the Piping Material Class.xls workbook corresponds to the Field Lining Thickness Rule node in the Catalog task. See Piping Reference Data.