Weld Joint Geometry and Welding Symbols
Types of welds Groove welds Welding Technology Lee Co. ATC Images compliments of the American Welding Society
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
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
Types of Welds Groove 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
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
Groove Welds V-and double V-groove welds
•With thicker materials joint accessibility must be provided for welding to ensure weld soundness and strength
Groove Welds Bevel- and double-bevelgroove welds
Bevel- and J- groove welds are more difficult to weld than V- or U- groove welds • Bevel welds are easier in horizontal •
Types of Welds U-groove and Double Ugroove
• Welds in using J- and U-grooves can be used to minimize weld metal • These welds are very useful in thicker sections
Groove Welds J-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
Groove Welds flare-bevel and flare-vgroove welds • Flare -bevel and flare-v-groove welds are used in connection with flanged or rounded member
Groove Welds Scarf • Scarf is used for brazing
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