• Corner-flange weld.
• Flare-V-groove weld.
Welds made for edge joints, Figure 6-6, include:
• Butt weld or square-groove weld.
• Bevel-groove weld.
• J-groove weld.
• V-groove weld.
• U-groove weld.
• Edge-flange weld.
• Corner-flange weld.
Double Welds
Many groove welds are made from both sides of the
joint. The advantages of double-groove welds are:
• Less distortion of the final weldment.
• Less weld metal is needed, lowering cost.
• Preparation cost may be lower.
• Complete penetration through the joint.
Many fillet welds are also made from both sides of
the joint. The advantages of double-fillet welds are:
• Less distortion of the final weldment.
• Smaller fillet welds without loss of strength.
• Added protection for joints that contain fluids.
Applications for double welds are illustrated in
Figure 6-7.
Weldment Configurations
Basic weld-joint configurations are often modified
to assist in the assembly of the component parts, improve
joint access, or change the metallurgical and physical
properties of the weld. Some common weldment designs
are described here.
Joggle-type joints are used in tanks (cylinder-to-
head assemblies) where backing tooling or backing bars
are not effective or cannot be used, Figure 6-8. The auto-
motive industry uses this joint type in the manufacture of
unibody automobiles where one side of the panel must be
flush. One side of the panel is joggled with special joggle
tools. The unit is assembled, clamped, and the welding is
completed as required.
The tubular butt joint with built-in backing bar
design is used in tubular assemblies where tooling cannot
be inserted into the pipe diameter or where overall dimen-
sions are precise. In this case, the pipes are assembled
Chapter 6 Weld Joints and Weld Types 49
Figure 6-5. Types of welds that can be made with a basic
corner joint.
Butt
Fillet J
Spot V Edge
Corner
flange
Flare-V
Figure 6-6. Types of welds that can be made with a basic edge
joint.
Butt Bevel J
V-groove U-groove
Corner flange Edge flange