Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. [...]... inspection pig Paper for Conf Pipeline pigging and integrity monitoring, organized by Pipes & Pipelines International, Aberdeen, Feb 5 J.A.de Raad, 1990 Cable and other ultrasonic pigs Pipes & Pipelines International, March, 35, 2 302 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Assessment of pipeline defects THE ASSESSMENT OF PIPELINE DEFECTS DETECTED DURING PIGGING OPERATIONS THE... the integrity of a corroding pipeline or, alternatively, allow an operator to instigate improved or alternative methods of controlling corrosion Mechanical damage is the major cause of service failures in onshore and offshore pipelines handling petroleum or gas[3] However, as pipelines age 303 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology Fig.l Some... www.verypdf.com to remove this waterm Pipeline Pigging Technology Fig 12 The stripper technique being used in the 10-in test loop pipeline as shown in Fig 12 The system proved its capabilities over the full length of the pipe (400m) and several 3D bends (up to 360°) We assume that the current cable length (2000m) is the only range limit for this technique when applied in an almost-straight pipeline Probably the combination... of corrosion (Fig 1) along an entire pipeline length The data can be processed to focus attention on sections of the pipeline or individual pits in individual pipeline spools, Fig.2 The accuracy of some tools is such that readings from a later on-line inspection can be superimposed on those from the early inspection, and corrosion rates obtained for sections of the pipeline, Fig.3(a) Additionally, it... be expected Application to field data In a pipeline, each spool can have several hundred metal-loss readings Therefore, a variety of wall-thickness measurements are available: (a) mean metal loss in each spool or the entire pipeline; (b) maximum metal loss in each spool or the entire pipeline; (c) distribution of maximum and mean metal loss for the entire pipeline; (d) distribution of metal loss in... for the J-tube inspection Fig 19 RPIT application on the Cormorant Alpha riser 301 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology The operation went smoothly; the RPIT did not stop, passing all pipeline features without problems, and no mechanical damage to the pig occurred The tool was successfully triggered by the source, and the memory thereafter... found in oil and gas pipelines Fig.2 Types of corrosion data available from an OLTV run 304 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Assessment of pipeline defects and they are inspected with intelligent pigs, corrosion is proving to be a major problem, causing repair and replacement bills of hundreds of millions of dollars in European[6] and American[7] pipelines Therefore,... onshore lines, can be in excess of £.100,000 per defect This paper presents a methodology for the assessment of corrosion in pipelines, with particular reference to on-line inspection of heavily-corroded pipelines The use of on-line inspection for the condition monitoring of corroding pipelines is discussed and safety factors for use in the assessment methods proposed ON-LINE INSPECTION DATA Introduction... this waterm Pipeline Pigging Technology Fig 10 PIT prior to lowering into the subsea manifold at Taranto of the conventional cable, and the same reel as used for the 2000-m conventional cable can store the 6000-m optical cable The reel will be equipped with optical rotary joints for uninterrupted rotation The PIT 6000, to be completed in the second half of 1991, will be suitable for inspecting pipelines... readings in individual spools to check for 305 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Pipeline Pigging Technology Fig.3 Metal-loss readings from on-line inspections 306 Please purchase PDF Split-Merge on www.verypdf.com to remove this waterm Assessment of pipeline defects preferential corrosion around the pipe circumference, Fig.3(b) The ability of the tools to accurately