on the welding symbol what does the groove weld size indicate?

Groove Weld Size

On a Groove welding symbol, the groove weld size indicates the desired size or dimensions of the groove weld.

It specifies the width, depth, or other relevant measurements of the groove that needs to be prepared for the weld.

“Groove Weld Size is always given on the left side of the Groove Weld symbol. (See 1/2 in the example below).”

In the below groove welding symbol,

• 1/2 is the groove weld size,
• 1/16 is the root gap or root opening,
• 90 is the groove weld angle.

The groove weld size is typically represented by a dimension or a series of dimensions placed either above or below the reference line of the welding symbol.

Elements of a Groove Weld

The elements of a groove weld include:

1. Groove Angle: The angle formed between the two surfaces being joined by the weld. It determines the shape and preparation of the groove.
2. Root Face: The portion of the joint on each side of the root that is not included in the fusion zone. It helps to control the root penetration and reinforcement of the weld.
3. Root Opening: The gap or space between the two members being joined at the root of the weld. It affects the penetration and strength of the weld.
4. Groove Depth: The depth of the groove preparation, which is the distance from the surface of the base metal to the bottom of the groove. It determines the amount of filler metal required and affects the strength of the weld.
5. Groove Radius: The curved portion at the bottom of the groove. It helps to minimize stress concentration and improve the quality of the weld.
6. Groove Width: The distance between the groove faces, which is usually measured at the widest point of the groove. It determines the amount of filler metal needed and affects the strength of the weld.
7. Weld Size: The size of the finished weld, which is typically specified by a dimension or symbol on the welding symbol. It represents the size of the weld throat or the effective cross-sectional area of the weld.

These elements collectively define the dimensions and characteristics of the groove weld, ensuring the proper preparation and execution of the weld joint.