![]() Symbols for double-sided butt welds are drawn on the opposite side of each other. If the symbols are not clear enough, meaning that they cannot provide the information needed, there may be a drawing of the cross-section of the weld with its dimensions. These symbols are combined so as to convey certain configurations. You can usually find them marked at the midpoint. Their purpose is to indicate the type of weld. Elementary SymbolsĮlementary symbols are usually added to the reference line. The complete set of welding symbols is published by the American National Standards Institute (ANSI) and the American Welding Society (AWS). The joint is the basis for reference for welding symbols. These are a set of symbols that describe the weld, the weld leg size, as well as giving processing and finishing information. You are more than likely going to come across welds on engineering and fabrication drawings. The most important symbols that you do have to memorize are the fillet weld symbol and the groove weld symbol. However, you should know how to read a welding chart as it is much more important than trying to memorize all of them by heart. Learning all the welding symbols may be hard as there are a lot of them. Contour – These symbols designate the final weld end product contour.Weld all around – It signals that the weld is to be made over the entire circumference. ![]() Spacer – This symbol indicates the type and the dimension of the spacer that is inserted between the welded pieces.If it has R in it, it should be removed after welding. Backing bar – Designates the backing bar to be used on the back of the weld.Surfacing – Specifies the welds that are made over the entire surface of the piece.Melt-thru – Indicates that the root of the weld needs to be reinforced.Something like giving the weld a good back. The back weld on another hand goes after the actual weld. The backing weld is deposited before the actual weld in the groove. Back/Backing – They use the same symbol but are different.The article below covers others as well and in more detail. These are some of the supplemental weld symbols. Production of this article took a long time and if you decide to take an image and upload it on your website please add a link back with a source to this original article. I drew all of the drawings myself in vector-based software. Useful Literature to Help You Understand Symbols.Location of Elements of a Welding Symbol.While I highly recommend you read it all and see all of the images, here is a handy small table of contents that links to the top sections of the article: If you don’t have the time or you don’t have an internet connection at your workplace you have a free downloadable PDF file (e-book) with all the welding symbols and their short explanation. This is a Massive article with well over 4000 words, over 50 subheadings, and symbol drawings. We break down all the important pieces about this topic right here. If your goal is to become a pro one day (read bigger salary!), then you better sit down and study. It might be for amateurs, but professional welders have to have exact knowledge about welding symbols. Some people think that just knowing the welding process is enough.
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