Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Import Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers about importing *.NTL files into AutoPIPE Item #1: When importing an *.NTL file, noticed that all the Pipe Properties PipeIDs have Material = NS instead of the material setting shown in the actual NTL file: Why and how to avoid? Answer: 1. Open the NTL file in any text editing program (i.e Notepad, Wordpad, MS Word, Ultra Edit, etc..) . 2. Look at the first 5 lines of data, is there a line that starts with the Word JOB ? Fig #1: To keep up with the new file formats of AutoPIPE, new versions of the NTL fie have been created. If the JOB card is missing in the NTL file ( see Fig #2 below), AutoPIPE will assume the file is in the default version 1.2 format. Fig #2: If the Job card is present, look in column #60 to the far right in order to see the NTL file format version (i.e. version = 1.8, fig #1 above). Depending on the file format version, be sure the data matches the format requirements of that version. Example , the data in Fig #2 above matches the 1.8 file format, but since the JOB card was missing AutoPIPE assume the data was in the default version 1.2 format. For NTL version 1.2, Pipe material should be in 2 nd line of PIPE card. As 2 nd line is empty, therefore default type set to ‘NS’ . In this case, the issue was resolved by adding the JOB card into the file as shown in Fig #3 below. Fig #3: Note: what is the format of this NTL? 2nd line of the Pipe Id (fig #2) is for Pipe Tag. which was added in AP9.5 having NTL version 1.8 or higher. Item #2: On the Command card reference for "Pipe - Pipe Data" for importing NTL files. See CORA and MTOL do not appear to be properly interpreted for PIPID's when importing my file. CORA = 1.0 yet import message file (*.MSG) claims Corrosion thk. Furthermore, "MTOL" should be 10. but when open in AutoPIPE it shows 1.191. Explanation for this apparently anomalous behavior is requested. Answer: In this specific case, your original NTL file had the following: PIPE MATID01 609.6000 9.5250 1.0000 10.0000 Meaning: Pipe of = 609.6 mm Wall thickness = 9.525 mm Corrosion Allow = 1.0 mm Mill Tolerance = 10.0 mm When importing the NTL file the following warning is displayed: PIPE MATID01 609.6000 9.5250 1.0000 10.0000 *** WARNING: Corrosion thk. Corrosion set to 0. Therefore when you open your model: Pipe of = 609.6 mm Wall thickness = 9.525 mm Corrosion Allow = 0.0 mm Mill Tolerance = 1.191 mm You question is where does 1.1961 come from? See the online help for this Mill Tolerance Field on the Pipe Properties Dialog screen: This value is used in the calculation of hoop stress. The default is 12.5% of the pipe thickness. Therefore, 9.525 * 12.5% = 1.190625 rounded up = 1.191mm If you want to know how to correctly update a NTL file to import some user defined values; create an AutoPIPE model (*.DAT) file with the correct values desired during importing an NTL file. Then Export the AutoPIPE file to an NTL file, open the NTL file created by AutoPIPE in any word editing program, and review the NTL format created based on your settings. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
↧