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A code in the tail of a welding symbol naming the process.
Also known as: Welding tail reference, Process specification note
The forked tail of a welding symbol carries references the symbol itself cannot express — the welding process, a procedure specification, an inspection requirement. ISO numbers the processes and AWS letters them, so the same process appears as 111 on one drawing and SMAW on another.
Carries process, procedure and specification references in the forked tail at the end of a welding reference line.
Contexts: Technical drawing
Uses numeric process codes under ISO 4063 and letter abbreviations under AWS, so manual metal arc welding is 111 on one drawing and SMAW on another.
Contexts: Technical drawing
A forked tail like an open arrowhead at the far end of a horizontal reference line, containing letters or numerals.