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.
Issue Section:
Technical Briefs
1.
API 6D Specification for Pipeline Valves (Gate, Plug, Ball, and Check Valves).
2.
ANSI/ASME B 16.34 Valves, Flanged, Threaded End, Welding End.
3.
ASTM A350 Standard specification for carbon steel forgings for piping components.
4.
Abid
, M.
, and Siddique
, M.
, 2005, “Numerical Simulation to Study the Effect of Tack Welds and Root Gap on Welding Deformations and Residual Stresses of a Pipe-Flange Joint
,” Int. J. Pressure Vessels Piping
0308-0161, 82
, pp. 860
–871
.5.
Fricke
, S.
, Keim
, E.
, and Schmidt
, J.
, 2001, “Numerical Weld Modeling—A Method for Calculating Weld-Induced Residual Stresses
,” Nucl. Eng. Des.
0029-5493, 206
(2-3
), pp. 139
–150
.Copyright © 2008
by American Society of Mechanical Engineers
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