Field Weld Symbol on drawing

Field Weld Symbol meaning? The field weld symbol is a graphical representation used in engineering drawings to indicate that a weld is to be made on-site rather than in a fabrication shop. The symbol consists of a flag that is attached …

ISO-and-AWS-Field-weld-symbol

Field Weld Symbol meaning?

The field weld symbol is a graphical representation used in engineering drawings to indicate that a weld is to be made on-site rather than in a fabrication shop.

The symbol consists of a flag that is attached to the reference line of the welding symbol, and may be accompanied by additional information such as the length of the weld or the type of weld to be used.

Remember, a Field Weld or also called Site Weld Symbol is Supplementary Welding Symbol. Its mean, there must be a basic weld symbol for a complete Field Welding Symbol.

Field Weld Symbol Meaning

The meaning of the field weld symbol is that the weld is to be made in the field, typically at the construction site where the metal parts are being assembled. This is in contrast to shop or factory welding, where the parts are welded together before they are transported to the construction site.

Applications of Field Weld Symbol

Field welding is often used in construction projects where large metal structures are being built, such as bridges, buildings, and pipelines.

The field weld symbol is used to provide clear and concise information about the welding requirements for a particular joint that will be performed on-site. It indicates that the weld is to be made in the field, which may require different equipment and welding procedures than those used in a fabrication shop.

The symbol also specifies the type of weld to be used, such as fillet weld, groove weld, or flare-bevel groove weld.

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AWS Field Weld Symbol

In below example, right hand symbol shows a Field Weld Symbol Groove weld. On right hand top side, a groove weld on arrow side is made on the site. On right hand bottom side, two groove welds on arrow side to be made on the site.

ISO 2553 Field Weld Symbol

ISO field Weld is similar to the AWS. A field or site weld is shown by flag added to the reference line as shown in above picture on left hand side. The main difference between the AWS And ISO Field weld symbol is the placement of the weld symbol on the reference line.

What is field weld symbol used for?

A Field Weld Symbol is used for the designation for welds made at the field or construction site, instead of a fabrication shop, is indicated by using the flag symbol.

This is added on either side of the reference line, where it meets the arrow line, as depicted in the figure below. The position or direction of the flag (whether above or below the reference line, pointing left or right) does not hold any particular meaning.

What tool to use to make the field weld symbol?

To create a field weld symbol, you can use various tools, including computer-aided design (CAD) software or drafting software that supports welding symbol functionalities. These software programs typically have specific features and libraries for creating welding symbols.

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Some popular CAD software options that support welding symbol creation include:

  1. AutoCAD: AutoCAD is a widely used CAD software that provides tools and features for creating welding symbols. It offers a comprehensive set of drafting and annotation tools to accurately represent welding information.
  2. SolidWorks: SolidWorks is a 3D CAD software that also includes capabilities to create 2D drawings. It offers welding symbol functionality, allowing you to create and add welding symbols to your drawings.
  3. CATIA: CATIA is a powerful CAD software often used in the aerospace and automotive industries. It provides tools for creating welding symbols and generating detailed drawings with accurate welding information.

These software options offer user-friendly interfaces, extensive symbol libraries, and the ability to customize symbols based on industry standards. Additionally, they provide features for dimensioning, annotation, and precise placement of welding symbols within the drawing.

It is important to refer to the applicable welding standards, such as AWS A2.4 or ISO 2553, when creating welding symbols to ensure accurate representation and clear communication of welding information.

Field Weld Symbol Importance

“it is a circle drawn on the welding symbol indicating that the weld is to be made on-site or in the field, rather than in a controlled shop environment.”

Explanation:
When a circle is added to a welding symbol, it signifies that the weld is to be performed at the actual construction site or in the field, rather than in a controlled shop environment. This distinction is important because field welding may involve different considerations and challenges compared to shop welding.

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Field welding often involves working in less controlled conditions, such as outdoor environments or confined spaces. Factors such as weather, accessibility, and site-specific constraints can affect the welding process and require additional precautions or specialized techniques.

The circle added to the welding symbol serves as a visual indicator for welders and inspectors that the weld is designated for field welding. It alerts them to be aware of the unique conditions and potential challenges associated with performing the weld on-site. This can include factors such as limited workspace, the need for portable equipment, and adherence to specific site safety protocols.

By including this circle on the welding symbol, the drawing conveys crucial information to ensure that the welding process is appropriately planned, executed, and inspected in accordance with the field welding requirements.


Sandeep Kumar is a highly experienced welding professional and author known for his expertise in welding symbols. With certifications including IWE, AWS-CWI, and ASNT NDT Level III.

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