What are the common types of welds?

Common weld types are mainly divided into the following categories, which you can choose from based on different welding needs and scenarios:

I. Classified by Spatial Position
Flat weld: A weld performed above the horizontal position with a weld angle of 0°–5° and a weld rotation angle of 0°–10°.
Horizontal weld: A weld where the weld axis forms a certain angle with the horizontal plane (usually 70°–110°).
Vertical weld: A weld where the weld axis is perpendicular to the horizontal plane.
Overhead weld: A weld located below the workpiece, requiring the welder to weld from below.
II. Classified by Joining Method
Butt weld: A weld made between the bevelled surfaces of the workpieces or between the bevelled surface of one part and the surface of another part.
Fillet weld: A weld made along the intersection line of two perpendicular or nearly perpendicular parts.
Edge weld: A weld formed by an edge joint.
Plug weld: A weld formed by overlapping two parts, with a circular hole in one of them, and welding the two plates together in the circular hole.
Slot weld: A weld formed by overlapping two plates, with a long hole in one of them, and welding the two plates together in the long hole.
III. Classified by the Position of the Weld in Space During Welding
Flat welding: A weld performed above the horizontal position with a weld angle of 0°–5° and a weld rotation angle of 0°–10°.
Horizontal welding: A weld where the weld axis forms a certain angle with the horizontal plane (usually 70°–110°).
Vertical welding: A weld where the weld axis is perpendicular to the horizontal plane.
Overhead welding: A weld located below the workpiece, requiring the welder to weld from below.
IV. Classified by Weld Continuity
Continuous weld: A weld that is continuously welded.
Intermittent weld: A weld that is welded with certain intervals.
Tack weld: Short welds made before welding to assemble and fix the position of the joint of the components. V. Classification by Force and Structure
Butt welds: Classified into full penetration butt welds and partial penetration butt welds based on the degree to which the weld metal fills the base material.
Fillet welds: The edges of the connected plates do not require precise machining, there are no gaps between the plates, and the weld metal directly fills the right-angle or oblique-angle area formed by the two welded parts.
Plug welds: A weld formed by welding two plates together through a circular hole in one of the overlapping plates.
Slot welds: A weld formed by welding two plates together through an elongated hole in one of the overlapping plates.
End welds: Welds formed in the construction of end joints.
VI. Classification by the Role of the Weld in the Structure
Working welds (load-bearing welds): The weld and the welded parts are connected in series to form a whole, mainly bearing the load.
Connecting welds (non-load-bearing welds): The weld and two or more welded parts are connected in parallel to form a whole; the weld does not directly bear the load.