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Technical Briefs

Effect of Groove Geometry on Weld-Induced Deformation in Full-Welded Ball Valve

[+] Author and Article Information
Xu Zeliang

 Shanghai Neles-Jamesbury Valve Co., 333 Qinqiao Road, Jinqiao Export Processing Zone, Pudong, Shanghai 201206, P.R.C.

J. Pressure Vessel Technol 130(3), 034502 (Jun 12, 2008) (4 pages) doi:10.1115/1.2938515 History: Received June 26, 2006; Revised May 17, 2007; Published June 12, 2008

Welding groove geometry is one of the factors determining the structure’s weld-induced deformation. There are three types of welding groove geometry available for a full-welded ball valve. Multipass butt-welded plate experiments and finite element analysis were applied to determine which is the best of the valve. The experiments and analysis both show that the U-q groove is the best choice for the full-welded ball valve to get the smallest weld-induced deformation.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Configuration of full-welded valve and traditional valve. (1) End piece, (2) weld, (3) center piece, (4) stem, (5) ball, (6) support plate, (7) seal seat, (8) nuts and screws.

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Figure 2

Structure of plate specimens

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Figure 3

Restrain on the plate specimens

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Figure 4

Geometries of welding groove

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Figure 5

Mesh and deformation configuration of butt-welded plate specimen

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Figure 6

Material properties for A350

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Figure 7

Transient temperatures of the U-q and U-p specimens

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Figure 8

Transverse shrinkages of the U-q and U-p specimens

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