Weld Types
There are various types of welds that can be made in each of the basic joints. They include:

Butt joint, Figure 2.
• Square-groove butt weld.
• Bevel-groove butt weld.
• V-groove butt weld.
• J-groove butt weld.
• U-groove butt weld.
• Flare-V-groove butt weld.
• Flare-bevel-groove butt weld.

T-joint, Figure 3.
• Fillet weld.
• Plug weld.
• Slot weld.
• Bevel-groove weld.
• J-groove weld.
• Flare-bevel-groove weld.
• Melt-through weld.

Figure 2: Types of welds that may be made with a basic butt joint

Figure 3: Types of welds that may be made with a basic T-joint.

Figure 4 Types of welds that may be made with a basic lap joint.

Lap joint, Figure 4.
• Fillet weld.
• Plug weld.
• Slot weld.
• Spot weld.
• Bevel-groove weld.
• J-groove weld.
• Flare-bevel-groove weld.

Corner joint, Figure 5.
• Fillet weld.
• Spot weld.
• Square-groove weld or butt weld.
• V-groove weld.
• Bevel-groove weld.
• U-groove weld.
• J-groove weld.
• Flare-V-groove weld.
• Edge weld.
• Corner-flange weld.

Edge joint, Figure 6.
• Square-groove weld or butt weld.
• Bevel-groove weld.
• V-groove weld.
• J-groove weld.
• U-groove weld.
• Edge-flange weld.
• Corner-flange weld.

Double Welds
In some cases, a weld cannot be made from only one side of the joint. When a weld must be made from both sides, it is known as a double weld. Figure  shows common applications of double welds in basic joint designs.

Figure 5: Types of welds that may be made with a basic corner joint.

Figure 6: Applications of double welds.

Figure 7: Types of welds that may be made with a basic edge joint.