Welding Symbols can be used when producing drawings for your metal fabrication.
It is important for us to understand what weld detail is important to you for your fabrication design. Simply saying weld here or corners to be welded doesn’t give us all the information. There may be instances where strength is less important rather than the aesthetics. For example keeping the amount of weld to a minimum or applying intermittent stitch welds help keep heat distortion down preventing from buckling. There are standard symbols that can be used within a drawing to help guide the welder and offer you a better control of the finished fabrication’s appearance and mechanical properties.
The British Standard for weld symbols is BS EN 22553.
Identification of the weld process is required as part of the weld symbol the relevant weld process code is listed in BS EN ISO 4063.
The weld symbol always includes
1. An arrow line
2. A reference line
3. A dashed line
4. A symbol
Note: Weld symbols on the full reference line relates to welds on the near side of the plate being welded. Weld symbols on the dashed line relates to weld on the far side of the plate. If the welds are symmetrical on both sides of the plate the dashed line is omitted. If the dashed line is above the full line then the symbol for the nearside weld is drawn below the reference line and the symbol for the far side weld is above the dashed line. For example see sketch below Supplementary symbols below.
The weld symbols below are used in addition to the primary weld symbols as shown above. They are not used on their own.
Below is an example of the application of one of these symbols illustrating the identification of the location of the weld relative to the symbol.
