Weld Joint Geometry and Weld Symbols

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Weld Joint Geometry and Weld Symbols

• Parts of a Weld Joint
• Welding Technology
• Lee Co. ATC
• Graphics compliments of AWS

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Submitted by Craig Herald Welding Instructor Lee
County Area Technology Center
To the AWS Welding Educators Electronic File
Library www.aws.org/Educators
Graphics provided compliments of the American
Welding Society Education Department
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It may be necessary to describe the exact joint
design

• Once you can identify the types of joints, you
  must be able to identify individual features that
  make up the joint geometry for a particular joint
• These features and elements are often essential
  variables in welding procedure, as well as
  production welding
• Welding personal may required to apply this
  knowledge once in the industry

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Parts of a weld

• Joint root
• Groove face
• Root face
• Root edge
• Root opening
• Bevel
• Bevel angle
• Groove angle
• Groove radius

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Joint root is that portion of a joint to be
welded where the members are closest to each other

• The joint root may be either a point, line, or an
  area
• The joint roots are shown as shaded areas in
  (A)-(D) and lines in (E) (F)

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Groove Face, Root Face, and Root Edge

• Groove face is that surface of a member
  included in the groove
• Root face (land) is that portion of the groove
  face within the joint root
• Root edge is a root face of zero width

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Root Opening and Bevel

• Root opening is the separation between the work
  pieces at the joint root
• Bevel (chamfer) is an angular edge preparation

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Bevel Angle, Groove Angle, and Groove Radius

• Bevel angle is the angle between the bevel of a
  joint member and a plane perpendicular to the
  surface of the member
• Groove angle the total included angle of the
  groove between members
• Groove radius applies only to J-U- groove welds

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Extra information is necessary to describe the
exact joint design

• For a single-bevel-groove-weld, the bevel angle
  and the groove angle are equal
• Groove radius is the radius used to form the
  shape of a J- or U- groove weld. Normally the
  weld configuration is specified by both an angle
  and a radius