AWS A2.4 pdf free download

AWS A2.4 pdf free download.Standard Symbols for Welding, Brazing, and Nondestructive Examination.
3. Basic Welding Symbols
3.1 I)istinction between Weld Symbol and Welding Symbol. This standard makes a distinction between the terms weld symbol and welding symbol. The weld symbol indicates the type of weld and, when used, is a part of the welding symbol.
3.2 Basis of Reference. In the present system, the joint is the basis of reference. The arrow side is the side of the joint to which the arrow of the symbol points. The other side is the side of the joint opposite the arrow side.
3.3 Weld Symbols. Weld symbols shall be as shown in Figure 1. The symbols shall he drawn in contact with the reference line.
3.4 Supplementary Welding Symbols. Supplementary symbols to he used in connection with welding symbols shall be as shown in Figure 2.
3.5 Welding Symbols. A welding symbol may consist of several elements (see Figure 3). Only the reference line and the arrow are required elements. Additional elements may be included to convey specific welding information. Alternatively, welding information may be conveyed by other means such as by drawing notes or details, specifications, standards, codes, or other drawings. which eliminates the need to include the corresponding elements in the welding symbol.
The tail of the symbol is used for designating the welding, brazing, and cutting process as well as the welding or brazing specifications. procedures. or the supplementary intormation to he used in making the weld or braze. The process; identification of the filler metal that is to be used: whether peening, backgouging. or other operations are required; and other pertinent data should be known. The notation to he placed in the tail of the symbol indicating these data is usually established by the user.
All elements, when used, shall have specific locations within the welding symbol as shown in Figure 3. Mandatory requirements regarding each element in a welding symbol refer to the location of the element and should not be interpreted as a necessity to include the element in every welding symbol.
3.6 Placement of the Welding Symbol. The arrow of the welding symbol shall point to a line, location, or area that conclusively identifies the joint, location, or area to he welded.
3.7 Illustrations. The examples given, including the dimensions, are illustrative only and are intended to demonstrate the proper application of drafting practices. They are not intended to represent design practices or to replace code or specification requirements.
5.1.1 Fillet, Groove, and Edge Weld Symbols. For these symbols, the arrow shall contact the oilier surface of one of the joints, and this side shall be considered the arrow side of’ the joint. The side opposite the arrow side of the joint shall he considered the other side of the joint (see Figure 5).
5.1.2 Plug, Slot, Spot. Projection, and Seam Weld Symbols. For these symbols, the arrow shall contact the outer surface of one of the joint members at the centerline of the desired weld. The member toward which the arrow points shall be considered the arrow-side member. The other joint member shall be considered the other-side member (see the Figures cited in Clauses 8 through 11).
5.1.3 Symbols with No Side Significance. Some weld symbols have no arrow-side or other-side significance. although supplementary symbols used in conjunction with them may have such significance (see 10.1.2 and 10.1.4).AWS A2.4  pdf download.