Applies To Product(s): OpenPlant Modeler Version(s): 08.11.09.XXX Environment: Windows 7 64 bit Area: Properties Subarea: Original Author: Harpreet Singh, Bentley Technical Support Group Introduction This article will provide the information on how to calculate the bottom of pipe i.e. BOP in OPM. For that first we need to add calculated property in the schemas under Class PIPE which will calculate the Bottom of Pipe automatically based on the formula Z-OD/2-Insulation thickness. Where Z=Elevation of pipe centerline OD= Outside Diameter of pipe Steps to Accomplish User need to map Pipe OD from the spec to OUTSIDE_DIAMETER property on PIPE class, as it is not mapped by default: Open OpenPlant_CustomAttributes.08.11 schema in class editor. Open OpenPlant_3D.01.04 schema & supplement it with O penPlant_3D_Supplemental_Modeling.01.04 schema. Go to PIPE class and select its OUTSIDE_DIAMETER property. Add a custom attribute OPENPLANT_PHYSICAL_CATALOGUE_PROPERTY_MAP on this property. Add PIPE_OD_M in property name field as shown below in the picture. Assuming the Horizontal Pipe: Add a new Property BOP_M on PIPE class. Add custom attribute ‘Calculated ECProperty Specification’ on it. Add this expression as shown below in the picture: ((this.TRANSFORMATION_MATRIX.M11/1000 - this.OUTSIDE_DIAMETER/2 - this.INSULATION_THICKNESS)+0.5)\1 4. Save the changes in schema and verify the results in OPM. Note that in all calculations 1000 is hardcoded value, which should be changed to the current UOR used in your dgn files/project. 1000 per millimeter is default for a Metric project.
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