Field weld
A small flag on the welding symbol. The weld is to be made in the field, on site, rather than in the shop.
How to read it
Welds that cannot be made in the shop are identified as field welds. The field weld symbol is a black flag that points toward the tail of the welding symbol. Whether a weld is a shop or a field weld is one of the things weld symbols are used to show.
Also searched as: field weld flag.
This explains what a symbol specifies on a drawing. It isn't welding instruction, and a drawing's own notes and the governing code take precedence.
Differences by country or standard
The international system uses a flag too. India's IS 813:1986, which draws on ISO 2553, uses a flag to indicate a field or site weld.
Read next
- Next in Welding symbolsTailThe fork at the end of a reference line. It carries a specification, process or other reference when the weld needs one.
- The same shape in Multimeter symbolsDiode test symbolThe diode test setting. The symbol is the circuit symbol for a diode, a triangle pointing at a bar; on this setting the meter shows the voltage drop across a diode, or OL.
More welding symbols
The same shape elsewhere
Browse symbols drawn with arrows, lines or triangles.
Sources
- Steelworker, Volume 1, NAVEDTRA 14250, 1996, Naval Education and Training Professional Development and Technology Center, U.S. Navy (Internet Archive), Chapter 3, Drawings and specifications
- Welding Theory and Application, TM 9-237, 1967, Department of the Army (Internet Archive), Chapter 11, Section II
- Scheme of symbols for welding, IS 813:1986, Bureau of Indian Standards (Internet Archive, Public.Resource.Org), Section 7.2
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 25, 2026. How we research
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