149CHAPTER 10 Advanced Welding SymbolsWeld all aroundField weldWeld lengthIntermittent weldSkip weldKEY TERMSSpacerConvex contourConcave contourFlush contourMelt-throughLEARNING OBJECTIVE•Be able to interpret AWS welding symbols that include all of the information that could be used on themOVERVIEWMany additional elements can be added to the basic parts of the AWS welding symbol. The additional elements and their placement, along with the basic parts of the welding symbol, are shown in Figures 10-1 and 10-2. They are described throughout the remainder of this chapter.WELD ALL AROUNDThe specification to weld all aroundrequires that the weld be made to encapsulate the entire joint. In the case of a circular joint, the weld all around symbol is not required. The weld all around symbol consists of a circle that is placed over the intersection where the end of the reference line meets the arrow. Examples of weld all around welds and welding symbols are shown in Figures 10-3 and 10-4.PitchChain intermittent weldStaggered intermittent weldConsumable insertBacking
150CHAPTER 10Figure 10-1 AWS Standard Locations of the Elements of a Welding Symbol (AWS A2.4:2012, Figure 3 reproduced and adapted with permission from the American Welding Society (AWS), Miami, FL.)Figure 10-2 AWS Supplementary Symbols (AWS A2.4:2012, Figure 2 reproduced and adapted with permis-sion from the American Welding Society (AWS), Miami, FL.)
Advanced Welding Symbols 151FIELD WELDA field weldis defined by the American Welding Society (AWS) as “[a] weld made at a location other than a shop or the place of initial construction.”1The field weld symbol consists of a flag that is placed at the intersection where the end of the reference line meets the arrow (see Figure 10-5).1AWS A3.0M/A3.0:2010, reproduced with permission from the American Welding Society (AWS), Miami, FLField Weld SymbolsFigure 10-5 Field Weld Symbol ExamplesWeld All Around SymbolsFigure 10-3 Weld All Around SymbolsPLATE WELDED ON TOP OF ANOTHER PLATEBEAM WELDED TO A PLATECHANNEL WELDED TO A PLATEFigure 10-4 Example of Weld All Around Welds
152CHAPTER 10WELD LENGTHEach weld, with the exception of spot and plug welds, has a length component. The weld lengthmay be the entire length of the joint or some portion thereof. There are several different methods for providing the weld length information on a drawing. When the weld is to be the entire length of the joint, the length component is not required on the welding symbol. The welding symbol points to the joint requiring the weld, and the weld is made the entire length of that par-ticular joint, as shown in Figure 10-6. If a weld is required to make a change in di-rection, an additional welding symbol or a multi-arrow symbol should be used.