what does the flag mean on a welding symbol

What does the flag mean on a welding symbol?

In the context of a welding symbol, when a flag is placed at the junction of the arrow and reference line, it signifies a field weld.

A field weld indicates that while the assembly or fabrication of the part may occur in a shop or off-site setting, the final welding process will be carried out on-site in the field during installation.

“A Flag on Welding Symbol means the weld to be made at the Site or Field.”

What is a Field Weld?

A field weld refers to a welding operation that is performed on-site or in the field, typically during the construction or installation of a structure or equipment.

Unlike shop welding, which takes place in a controlled workshop environment, field welding involves joining or repairing components directly at the location where they will be used.

Field welding is often necessary when the size, complexity, or logistical constraints of a structure make it impractical or impossible to fabricate and transport as a single unit.

It allows for the assembly and connection of prefabricated components or the integration of new elements into existing structures.

What is other name of Field Weld?

Field weld is also known as:

Peripheral Weld
Site weld

Construction weld
On-site weld

Why Flag is added to Welding Symbol?

Flag Welding Symbol or also called Field or Site Welding Symbol is a Supplementary Welding Symbol used to indicate that specific weld to be made the construction site and not in the shop.

The presence of the flag on the welding symbol provides important information to welders and fabricators involved in the project.

Below are additional elaboration on what the flag represents in the context of a field weld:

On-site Welding: The flag indicates that the welding operation is to be performed at the installation site rather than in a controlled shop environment. This is often necessary when the size or complexity of the structure makes it impractical or impossible to assemble and transport as a single unit.

Site-Specific Considerations: Field welding requires careful attention to site-specific conditions and constraints. Factors such as accessibility, weather conditions, surrounding structures, safety considerations, and logistical challenges need to be taken into account during the welding process.
Coordination with Construction Sequence: Field welding is typically carried out as part of the construction or installation sequence. It may involve joining prefabricated components or connecting the structure to existing elements. The flag helps communicate that the welding operation is a crucial step in the overall construction process.