Method analyzes buckling for reeled insulated line pipe

A method has been developed that identifies critical parameters for reeling coated or insulated line pipe and thereby avoid local buckling at tie in welds. Local buckling in thick-coated line pipe occurred during reeling trials with 13%Cr pipe and hot polyurethane field-joint coating (Fig. 1).Click here to enlarge imageCalled a "Reeling Parameter Study," the method identifies the relative importance of these parameters and documents the effect of possible remedial measures. Experience during reeling of pipelines with thick insulation coatings has shown that the combination of this type of coating with small changes of pipeline wall thickness or material properties across tie-in welds can...

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