Automatic Ultrasonic Inspection of Pipeline Girth （管道环缝的自动超声波检查）.pdfVIP

th th th 12 A-PCNDT 2006 – Asia-Pacific Conference on NDT, 5 – 10 Nov 2006, Auckland, New Zealand AUTOMATIC ULTRASONIC INSPECTION OF PIPELINE GIRTH WELDS WITH A CORROSIVE RESISTANT ALLOY (CRA) LAYER 1 2 3 4 5 6 Jan van der Ent ; Niele Findlay ; Niels Portzgen ; Oddbjørn Nupen ; Geir Endal ; Olav Førli 1RTD Rotterdam The Netherlands 2RTD Perth Australia 3RTD Rotterdam The Netherlands 4Technip Oslo Norway 5Statoil Stavanger Norway 6DNV Oslo Norway Abstract Development of the Norne Satellite Field comprises the connection of the two oil fields Stær and Svale to the Norne FPSO (see Figure). A unique solution, a common, single pipeline was selected by Statoil for transport of the multiphase well stream from the two oil reservoirs. The Norne field is located at 66° North and subjected to strict environmental requirements. Therefore a Carbon steel pipeline, built with a corrosive resistant alloy layer ( CRA ), had been selected for the resistance against the corrosive fluid without the use of chemicals. An implication of this construction method is that the pipeline girth welds have to be made with an austenitic welding consumable (typically Inconel), which is very difficult to inspect using ultrasonic testing method. Furthermore the reeling process used for the pipeline install