Tee Welding Joint. Tee welding joints are formed when two members intersect at a 90° angle which makes the edges come together in the center of a plate or component. There are four basic joints used in arc welding: A Butt Weld is a circumferential butt welded joint, and the most common type of joint employed in the. common applications of double welds in basic joint designs. 58 Gas Metal Arc Welding Handbook. Flare-bevel. Flare-V. J-groove. U-groove. Butt. Bevel-groove.


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Quality welding leaves a arc welding joints surface, while riveting has the ends of rivets on the surface of the whole structure.

Using welding to produce a strong yet beautifully smooth surface creates our functional but aesthetically pleasing architecture. Welded joints are better many times because the material on both sides of the weld is actually physically joined.

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  • There are four basic joints used in arc welding:
  • Types of Welded Joints

Welding can easily join sections of metal column or pipe. Fillet welded joints Fillet welded joints such as tee, lap and corner joints are the most common connection in welded fabrication. No edge arc welding joints is needed and assemblies in piping systems are simpler.

Therefore, fillet welds are usually cheaper than butt welds.

In pipe systems fillet welded joints are generally used for joining pipe to arc welding joints joints in sizes NPS 2 and smaller, and in systems where Slip On flanges will be used.

The welding arc and filler metal must be manipulated in order to place the molten metal where it is needed.

Arc Welding Fundamentals

The joint design should allow for the first weld bead to be deposited with a convex surface. An included weld angle or root opening that is too narrow promotes the formation of a concave weld bead that places the weld surface in tension and promotes solidification cracking in the weld metal.

Any arc welding system in which the arc welding joints is melted off to become part of the weld is described as metal-arc.

In carbon or tungsten TIG welding there are no molten droplets to be forced across the gap and onto the arc welding joints.

Weld Joint Design

Filler metal is melted into the joint from a separate rod or wire. More of the heat developed by the arc is transferred to the weld pool with consumable electrodes.

This produces higher thermal efficiencies and narrower heat-affected zones. Since there must be an ionized path to conduct electricity across a gap, the mere switching on of the welding current with an electrically cold electrode posed over it will not start the arc.

The arc must be ignited. This is caused by either supplying an initial voltage high enough to cause a discharge or by touching arc welding joints electrode to the work and then withdrawing it as the contact area becomes heated. The opening or gap at the root of the arc welding joints and the included angle of the groove should be selected to require the least weld metal necessary to give needed access and meet strength requirements.

V-joints[ edit ] Single butt welds are similar to a bevel joint, but instead of only one side having the beveled edge, both sides of the weld joint are beveled.

Welding and Joining

In thick metals, and when welding can be performed from both sides of the work piece, a double-V joint is used. When welding thicker metals, a double-V joint requires less filler material because there are two narrower V-joints compared to a wider single-V joint.

Also the double-V joint helps compensate for warping forces. With a single-V joint, stress tends to warp the piece in one direction when the V-joint is filled, but with a double-V-joint, there are welds on both sides of the material, having opposing stresses, straightening the material.

J-joints[ edit ] Single-J butt welds are when one arc welding joints of the weld is arc welding joints the shape of a J that easily accepts filler material and the other piece is square.


A J-groove is formed either with special cutting machinery or by grinding the joint edge into the form of a J.