You can set a different bore on part or all of a pipeline on-the-fly, such as when you need to introduce a component such as a reducer.
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Create a sketch similar to the one shown below. The bore size of the section of pipe labeled 1 is 6-inches:
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Select a pipe or component in the Detail window, and then select Tools > Change Bore Command > <Bore Size>. For example, select the pipe marked 1, and then select Tools > Change Bore > 8".
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Review the warnings in the Errors window.
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As the software changes the bore of each component, it looks for the default material for that bore and component type in the specification. If it does not find a default, it uses a generic material. The software reports each of these actions as a warning in the Errors window. In the example below, the software has replaced the fitting tees (T1RCFST-BW) with generic material because it was unable to find a default defined in the attached specification. The default sketch color for generic material is blue, indicating that no length has been defined.