A four-layer structure of the mild steel pipe, the inner layer is extruded thermoplastic tube, the liquid in the transmission from the seal; intermediate layers lining the carbon-filled polyethylene tube, which is resistant to long-term ability of UV radiation , and to exclude external static. The outermost layer is the thickness of the extruded outer shield to protect the pipe from external influences bottom. Flexible pipe for standard pressure ratings to ANSI classification.
Canada a long 2km, 6in diameter of the pipe, was shut down due to corrosion problems. The pipeline's route to go through 5 to 6 zone landowners apply for the construction of a new pipeline particularly difficult, therefore, decided to repair the pipeline. Wellstream adoption repair method is a mild steel pipe to the old, so you can not re-apply for the purchase of new pipe, which saves costs and reduces damage to the environment. The repair pipeline transporting liquid carbon dioxide is used to inject the wellhead to increase oil production. Wellhead in place leading to a 90 ° bend with two and a highway through the office. Pipe penetration to elapse before the pigging operation, removal of obstacles such work.
Terminal fitting is designed to be able to maintain structural integrity to meet, to ensure the inner and outer extruded layer of the sealing requirements, and to ensure the tension and pressure load transfer to the tube structure. Terminal parts of the sample after blasting and axial tensile test.
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