WELDINGResources / Welding symbols / Supplementary symbolsUpdated 29 Oct 2026

Weld all around symbol

Also called All-round weld, Peripheral weld

A circle at the junction of the arrow and the reference line means the weld goes all the way around the joint, such as a tube to a plate.

AWS A2.4
ISO 2553

What the weld all around symbol means

A circle at the junction of the arrow and the reference line means the weld goes all the way around the joint, such as a tube to a plate.

AWS A2.4 and ISO symbols

AWS A2.4

A circle at the junction of arrow and reference line.

AWS SVG
ISO 2553 (system A)

Peripheral weld. The same circle at the junction.

ISO SVG

Where you see it

Pipe and tube to plate joints, posts on base plates, nozzles and anything with a closed outline.

How it is inspected

Inspection of a weld all around usually covers visual inspection around the full outline, paying attention to the start and stop. Each inspection is recorded against the weld, so the joint can be signed off with its evidence. See the ITR guide.

Frequently asked questions

What does the weld all around symbol look like?

On AWS A2.4 drawings: A circle at the junction of arrow and reference line. In ISO 2553: The same circle at the junction.

Is the weld all around symbol the same in ISO and AWS?

No. The same circle at the junction.

Where is a weld all around used?

Pipe and tube to plate joints, posts on base plates, nozzles and anything with a closed outline.

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