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An arrow and horizontal reference line carrying weld type, size and process.
Also known as: Weld symbol, Arrow with a flag drawing, Line with a triangle
A welding symbol is a small notation system rather than one mark. Which side of the reference line the weld symbol sits on states which side of the joint is welded — and the two standards disagree about that, which is a genuine hazard.
Specifies a weld's type, size, length and process on a single arrow-and-reference-line assembly pointing at the joint.
Contexts: Technical drawing
States which side of the joint is welded by which side of the reference line the weld symbol sits on — below for the arrow side, above for the other.
Contexts: Technical drawing
Follows conventions that differ between the ISO and American systems, so the same drawing can be read two ways. Which standard governs a drawing is stated in its title block for exactly this reason.
Contexts: Technical drawing
A leader arrow pointing at a joint, meeting a horizontal reference line that carries a small geometric symbol above or below it, with figures written to either side.