Tài liệu PIPELINE PIGGING TECHNOLOGY- P15 pdf

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[...]... air) 413 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm This page intentionally left blank Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm PART 4 THE CONSEQUENCES OF INSPECTION Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm This page intentionally left blank Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm... plate 420 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Interpretation of pig survey results Fig.l Feature report giving feature size and location 421 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology Fig.2 Frequency distribution of metal-loss features 422 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm... corrosion 423 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology Reporting The analysis and interpretation procedures result in a computer file containing detailed information about pipeline flaws and their geographical positions in the pipeline The final step in the process is then to prepare a report which will provide the pipeline operator with the... SCFM) N/A NO FLOW 38 16.7 FPS (1,293 SCFM) N/A NO FLOW PEAK PIGGING DIFF PRES IN TRANSIT SPOOL(PSI) Table 10 S.U.N.Engineering 'squeegee' cup-type pig (using air) 412 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pigging through Yfittings PEAK PIGGING DIFF PRES IN TRANSIT SPOOL(PSI) TRANSIT SPOOL AVG VEL (FLOW RATE) PEAK PIGGING DIFF PRES IN T(PSI) FLOW IN OPPOSITE SIDE 6 4.50... Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology operators are adopting formalized, quantitative schemes, which can be used to great effect in ensuring that the most appropriate inspection, repair and maintenance programmes are employed over the life of a pipeline Once the decision has been made to perform an on-line inspection survey of a pipeline, considerations... Province of Alberta The system includes 40 compressor station sites, and approximately 15,600km (9,700miles) of buried pipeline, mostly operating in Class 1 locations The pipelines consist of approximately 425 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology Fig.l Nova's Alberta gas transmission division 800 segments, each with its unique characteristics... this paper; however, it is important to understand that for each pipeline segment the method allows the contribution, to the total outage probability, of each significant failure cause to be estimated separately This helps to recognize how pipeline 429 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology Fig.4 Risk spectra for a specific location (accidents.. .Pipeline Pigging Technology PEAK PIGGING DIFF PRES IN TRANSIT SPOOL(PSI) TRANSIT SPOOL AVG VEL (FLOW RATE) PEAK PIGGING DIFF PRES IN T(PSI) FLOW IN OPPOSITE SIDE 5 4.1 FPS (175 SCFM) 5 5.6 FPS (259 SCFM) N/A NO FLOW 6 10.0 FPS (510 SCFM) N/A NO FLOW 6 20.0 FPS (1,477 SCFM) N/A NO FLOW 687 SCFM N/A foam pig (using air) Table 9 TOW 'Redskin' TRANSIT SPOOL AVG VEL (FLOW RATE) PEAK PIGGING DIFF... programme, and to establish knowledgeable support for it 427 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology Alternative approaches We recognize that a number of options are available for rehabilitation and repair methods that may even include replacement of long sections of pipeline The rehabilitation projects performed by the industry in recent years... standard examples works only in a limited number of cases 419 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology For instance, a good weld at one point in a pipeline can produce a very different image from an equally-good weld at a different point on the same pipeline More sophisticated techniques have had to be used Possible faults are analysed using pattern-recognition . 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