Butt joints are formed when two plates are butted together. However, the fabrication shop must be capable of producing the deeper penetration level on a consistent basis, so this concept may not always be applicable. The weld symbol for a full penetration weld could look something like this. Here are three examples:. Commmon Joint and Weld Types Arc welding is taking two or more separate pieces of metal and joining them into one continuous or homogeneous section. A cross section of a weld particularly when etched will show you the penetration profile of the weld, including the depth and width of penetration see examples in Figures 3 and 4 , which also name and highlight the various parts of a fillet and groove weld. To keep the article fairly short, the discussion will be limited to arc welding, two common types of weld joints T and butt and two common types of welds fillet and groove.
Weld Fusion vs. Weld Penetration
It is important to match weld materials to the base metals that are being connected. When splicing a pipe column I've seen actually I haven't seen this but I have heard of it weld shops cut off a short piece of the pipe maybe 4" long and they cut a slit in it in the 4" direction. When you have a welding procedure that produces a deeper weld penetration and a resulting wider penetration profile , you increase the chances of still achieving complete fusion at the root, even with welders that have limited skills. The edge of one of the pieces is given a concave treatment and the other is left square. The weld symbol for a full penetration weld could look something like this. Visual inspection is the least expensive method but cannot detect many weld defects. It is also used frequently when welding in a fabrication shop.
CJP - Complete Joint Penetration Welds - Structural engineering other technical topics - Eng-Tips
However, if the weld is significantly deeper than wide, then the shrinkage stresses are unequal and the weld will crack in the center of the bead as a result. Download Now Since the launch of the first iPad in , tablets have become a ubiquitous part of our digital lives. Deeper weld penetration does not produce a fillet weld with more weld strength. The process of welding is quite complex and the strength of welds is highly dependent on metallurgy, welding procedure, and the skill of the welder. The groove weld is commonly used to make edge-to-edge joints, although it is also often used in corner joints, T joints, and joints between curved and flat pieces.
Deciphering Weld Symbols
Description: Here are three examples:. The welding process has been around for thousands of years. There are a couple of points to emphasize. As long as you have achieved complete fusion between the filler metal and the base plates and when appropriate, the steel backing bar , you have successfully joined the metal together into one homogenous piece.