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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 > Corrosion Allowance.
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Click the Insert Row Command
to insert a blank row in the grid view.
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In the Materials Category column, enter the materials code for which you are defining corrosion allowance.
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In the Fluid Code column, enter the fluid code for which you are defining corrosion allowance.
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In the Corrosion Allowance column, specify the corrosion allowance for the specified material and fluid codes. Be sure to include the units of measurement, in or mm, when specifying this value.
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Valid material codes are defined in the Material Grade select list.
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Valid fluid codes are defined in the Fluid Code select list.
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The Corrosion Allowance sheet in the Piping Materials Class.xls workbook corresponds to the Corrosion Allowance node in the Catalog task. See Piping Reference Data.