Q:

What are some standard welding symbols?

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Quick Answer

There are no standard welding symbols as each symbol is specific to the particular project. The symbols are instructions for welders. The symbols consist of arrows, leader lines, reference lines and optional tails. Geometric shapes on the reference line indicate the type of weld.

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What are some standard welding symbols?
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Full Answer

The American Welding Society determines the conventions for welding symbols. Designers draw the symbols on schematics to indicate to welders how to build items. The arrow points to a spot on a diagram showing where the item needs a weld. The leader line connects the arrow to the reference line.

The symbol on the reference line indicates the type of weld required, sometimes including numbers that indicate spacing or angle measurements. Some welding type symbols include a semi circle, which indicates a bead weld, a triangle, which indicates a fillet weld, and a square, which indicates a plug or slot weld.

Symbols on top of the reference line indicate that the welder should perform the weld on the joint the arrow points to, while symbols on the bottom of the reference line indicate that the welder should perform the weld on the opposite joint. Symbols on both sides of the reference line instruct the welder to perform the weld on both joints. An optional tail allows the designer to provide additional special instructions for the welder.

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