Loading AI tools
From Wikipedia, the free encyclopedia
The symbols and conventions used in welding documentation are specified in national and international standards such as ISO 2553 Welded, brazed and soldered joints -- Symbolic representation on drawings and ISO 4063 Welding and allied processes -- Nomenclature of processes and reference numbers. The US standard symbols are outlined by the American National Standards Institute and the American Welding Society and are noted as "ANSI/AWS".[1] Due in part to the growth of the oil industry, this symbol set was used during the 1990s in about 50% of the world's welding operations.[1] An ISO committee sought to establish a global standard during this decade.[1]
In engineering drawings, each weld is conventionally identified by an arrow which points to the joint to be welded. The arrow is annotated with letters, numbers and symbols which indicate the exact specification of the weld. In complex applications, such as those involving alloys other than mild steel, more information may be called for than can comfortably be indicated using the symbols alone.[1] Annotations are used in these cases.[1]
In the US, the component elements of the weld specification are:[2]
If a particular welding process needs to be indicated in addition to the symbols, the following abbreviations are commonly used in North America:[3][2]
Designation | Welding process |
---|---|
CAW | Carbon-arc welding |
DB | Dip brazing |
FB | Furnace brazing |
FW | Flash welding |
GMAW | Gas metal-arc welding |
GTAW | Gas tungsten-arc welding |
IB | Induction brazing |
OAW | Oxy-acetylene welding |
OHW | Oxy-hydrogen welding |
PGW | Pressure gas welding |
RB | Resistance brazing |
SAW | Submerged arc welding |
SMAW | Shielded metal arc welding |
TB | Torch brazing |
UW | Upset welding |
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.