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 Project IndexCurved Wide Plate Tests for X80, X100 and X120 Pipe SpecimensSeventeen curved wide plates were tested in -20˚C to assess the tensile strain capacity of three 30-inch X80 pipes, one 42-inch X100 pipe and one 40 inch X120 pipe. For more information on the project, contact: Randy Petersen, Research Engineer Compressive Strain Capacity in Strong-Weak JointsThe impact of yield strength and wall thickness differentials between adjacent pipe joints on the compressive axial strain capacity of girth-welded pipe was analyzed. A number of strong-weak cases were analyzed using finite element modelling. The results were used to develop a correction factor that can be applied to the strain limits calculated assuming uniform pipe properties to account for this effect. Northern Pipeline Buckling Tests, Phase 3Seven full-scale bend tests and a number of material coupon tests were performed on samples of X100 linepipe in both the as-received and thermally treated condition. Full scale testing included internal pressure and the presence of girth welds as test variables. For more information on the project contact: Chris Timms , Manager, Design & Construction Reliability Based Design and Assessment Standard DevelopmentA reliability based design and assessment standard for natural gas transmission pipelines was drafted and submitted to CSA Z662 and ASME B31.8 pipeline standard committees. This project involves working with the standard committes to incorporate this methodology as an alternative to conventional design and assessment methods. For more information on the project contact: Qishi Chen, Director, Pipelines & Structures Biaxial Tension Tests of 10-inch Pipes (Phase 3)Full-scale low-temperature tensile tests were conducted on two pressurized girth welded pipe specimens to verify the tensile strain capacity of the Mackenzie Gas Project natural gas liquids (NGL) pipeline. For more information on the project, contact: Randy Petersen, Engineer in Training In-Service Pipe Specimen Burst TestA pipe segment obtained from an in-service liquid pipeline was pressure tested to burst to determined the pressure resistance associated the defect features in the electric-resistance-welded long seam weld. For more information on the project, contact: Mohamed Chebaro, Engineer in Training Calibration of Strain Measurement DeviceA bi-axial test frame that subjected the pressurized pipe specimen to a displacement-controlled axial load was used to calibrate a strain measurement device. For more information on the project, contact: Mohamed Chebaro, Engineer in Training Determination of the Effect of Temperature on X52 Yield StrengthMaterials testing was performed at various temperatures to evaluate the stress strain behaviour of X52 linepipe For more information on the project contact: Qishi Chen, Director, Pipelines & Structures Line Pipe Fatigue TestsTwo pipe specimens with axial defects were tested to failure under internal pressure loading cycles representative of the pipeline operating conditions. The number of cycles to failure was compared to the values calculated from state-of-the art models to evaluate the acuracy of these models in predicting the remaining fatigue life. For more information on the project, contact: Randy Petersen, Engineer in Training Biaxial Tests of 14 Inch PipeSix full scale tensile tests were carried out on 14 inch pressurized girth-welded pipe specimens. The purpose of the tests was to reproduce gound-movement-induced failures that occurred in the field and to determine the axial tensile strain capacity of the welded pipe. For more information on the project contact: Qishi Chen, Director, Pipelines & Structures |
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