Double-V groove weld symbol
Also called X weld, Double-V butt weld
A double-V groove weld is a V groove on both sides of the joint. Welding from both sides balances distortion and halves the weld metal on thick plate.
What the double-V groove weld symbol means
A double-V groove weld is a V groove on both sides of the joint. Welding from both sides balances distortion and halves the weld metal on thick plate.
AWS A2.4 and ISO symbols
Double-V butt weld (X weld). The same X. ISO leaves out the dashed line for symmetrical welds.
ISO SVGWhere you see it
Thick plate butt joints that can be reached from both sides, such as ship and offshore structure plating and heavy beams.
What is written next to it
On the welding symbol, the double-V groove weld carries the groove depth on each side, the root opening and the groove angles.
How it is inspected
Inspection of a double-V groove weld usually covers the back gouged root of the first side, checked visually or with MT before the second side is welded, then ultrasonic testing of the finished joint. Each inspection is recorded against the weld, so the joint can be signed off with its evidence. See the ITR guide.
Related symbols
Frequently asked questions
What does the double-V groove weld symbol look like?
On AWS A2.4 drawings: A V above and below the reference line, making an X. In ISO 2553: The same X. ISO leaves out the dashed line for symmetrical welds.
Is the double-V groove weld symbol the same in ISO and AWS?
Yes, it is drawn the same way in most legends.
Where is a double-V groove weld used?
Thick plate butt joints that can be reached from both sides, such as ship and offshore structure plating and heavy beams.
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