The Isogen pipe wastage facility allows extra tube material to provide for wastage during spool fabrication. When the facility is used, you can manually increase the pipe length entries on the material list.
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The basic pipe wastage allowance is set by the user in the piping model on a plant area number basis. This value is expressed in terms of a percentage wastage factor, such as 10%, and is extracted and held at the pipe component level in the piping data file.
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The basic pipe wastage allowance operates independently of any settings in option switches 43 - 51. For example. a nominal tube length entry of 1,000 mm that has a 10% wastage factor set in the piping model means the actual material list entry would be 1,100 (1,000 + 10%).
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If the pipe wastage allowance value in the piping data file is set to zero, then option switches 43 - 51 will have no effect.
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Any such basic pipe wastage factor set in the piping model may then be overridden and increased (never decreased) by the user with option switches 43 - 51. For example, if the pipe was in PlantArea 2 and the wastage allowance needed to be increased to 20%, then Option Switch 44 would be set to 2.