Weld Joint Geometry and Welding Symbols

1
Weld Joint Geometry and Welding Symbols

• Types of welds
• Groove welds
• Welding Technology
• Lee Co. ATC
• Images compliments of
• the American Welding Society

2
Types of Welds

• Numerous welds can be applied to the various
  types of joints
• Considerations when choosing joint geometry and
  weld types
• accessibility to the joint for welding
• type of welding process being used
• suitability to the structural design
• cost of welding

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Types of Welds

• There are nine categories of welds associated
  with weld symbols
• Groove welds
• Fillet Welds
• Plug or Slot welds
• Stud welds
• Spot or projection welds
• Seam welds
• Back Or Backing welds
• Surfacing welds
• Flange Welds

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Types of WeldsGroove Welds

• A groove weld is a weld made in a groove
  between the work pieces
• There are eight types of groove welds
• Square-groove
• Scarf
• V-groove
• Bevel-groove
• U-groove
• J-groove
• Flare-v-groove
• Flare-bevel-groove

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Groove Welds Square and double square-groove
welds

• Square-groove welds are the most economical to
  use, but are limited by thickness of the members
• Welds for one side are normally limited to a 1/4
  inch or less

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Groove WeldsV-and double V-groove welds

• With thicker materials joint accessibility must
  be provided for welding to ensure weld soundness
  and strength

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Groove WeldsBevel- and double-bevel-groove welds

• Bevel- and J- groove welds are more difficult to
  weld than V- or U- groove welds
• Bevel welds are easier in horizontal

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Types of Welds U-groove and Double U-groove

• Welds in using J- and U-grooves can be used to
  minimize weld metal
• These welds are very useful in thicker sections

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Groove WeldsJ-and double-J-groove welds

• J-groove are more difficult to weld because of
  the one vertical side (except in horizontal)
• J-and U- are used when economic factors outweigh
  the cost of edge preparation

10
Groove Weldsflare-bevel and flare-v-groove welds

• Flare -bevel and flare-v-groove welds are used in
  connection with flanged or rounded member

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Groove WeldsScarf

• Scarf is used for brazing

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Groove Welds

• Their names imply what the actual configurations
  look like when viewed in a cross section
• Single groove welds are welded from only one side
• Double groove welds are welded on both sides
• Groove welds in many combinations are used
  selection is influenced by accessibility,
  economy, adaptation to structural design