Residual deformations of pipe-flange joints due to thermal strains caused by the multi-pass welding procedure in a manufacturing process are investigated both experimentally and numerically (FEM). To avoid any risk of leakage between two mounted pipes using flange joints, geometrical distortions (twisting) of the flange must be prevented. How the flange is distorted depends both on the groove shape and the weld sequence used. However, to be spared from machine work after the welding process, the distortions have to be minimized. A casting-technique has been developed in order to measure the twisting of the flange after each weld pass. Also, measurements of the residual radial deflection of the pipe have been performed.

Issue Section:
Research Papers
Topics:
Flanges, Pipes, Welding, Casting, Deflection, Deformation, Finite element model, Leakage, Machinery, Manufacturing, Risk, Shapes
1.
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2.
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3.
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4.
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5.
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6.
Troive L., and Jonsson M., 1994, “Numerical and Experimental Study of Residual Deformations due to Double-J Multi-Pass Butt-Welding of a Pipe-Flange Joint,” Proceedings of the IEMS ’94, Annual International Conference on Industry, Engineering and Management Systems, Cocoa Beach, FL pp. 107–114.
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 by The American Society of Mechanical Engineers
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