AWS A2.4:2007 - Standard Symbols for Welding, Brazing, and Nondestructive Examination - Method for Specifying Operations and Examination Information

Oct 28, 2026

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This American National Standard defines a symbol-based method for specifying selected welding, brazing, and nondestructive examination information. It provides detailed information and practical examples to support correct construction and interpretation of the symbols. The system enables specification of welding and brazing operations, including nondestructive examination parameters such as the examination method, frequency, and extent.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages8

Reading Time20 min

AccessFree to download

Dedication

Personnel

Foreword

List of Tables

List of Figures

1. Scope

2. Normative References

3. Basic Welding Symbols

3.1 Distinction between Weld Symbol and Welding Symbol

3.2 Basis of Reference

3.3 Weld Symbols

3.4 Supplementary Welding Symbols

3.5 Welding Symbols

3.6 Placement of the Welding Symbol

3.7 Illustrations

4. Joint Types

5. General Provisions for Welding Symbols

5.1 Location Significance of the Arrow

5.2 Location of the Weld with Respect to the Joint

5.3 Orientation of Specific Weld Symbols

5.4 Break in the Arrow

5.5 Combination Weld Symbols

5.6 Multiple Arrow Lines

5.7 Multiple Reference Lines

5.8 Field Weld Symbol

5.9 Extent of Welding Denoted by Symbols

5.10 Weld-All-Around Symbol

5.11 Tail of the Welding Symbol

5.12 Contour Symbols

5.13 Melt-Through Symbol

5.14 Melt-Through with Edge Welds

AWS A2.4:2007 An American National Standard Standard Symbols for Welding, Brazing, and Nondestructive Examination AWS A2.4:2007 An American National Standard Approved by the American National Standards Institute March 23, 2007 Standard Symbols for Welding, Brazing, and Nondestructive Examination 6th Edition Supersedes ANSI/AWS A2.4-98 Prepared by the American Welding Society (AWS) A2 Committee on Definitions and Symbols Under the Direction of the AWS Technical Activities Committee Approved by the AWS Board of Directors Abstract This standard establishes a method for specifying certain welding, brazing, and nondestructive examination information by means of symbols. Detailed information and examples are provided for the construction and interpretation of these symbols. This system provides a means of specifying welding or brazing operations as well as nondestructive examination, including the examination method, frequency, and extent. 550 N.W. LeJeune Road, Miami, FL 33126 Table of Contents Page No. Dedication .................................................................................................................................................................... v Personnel ....................................................................................................................................................................vii Foreword ..................................................................................................................................................................... ix List of Tables .............................................................................................................................................................xiv List of Figures............................................................................................................................................................xiv 1. Scope ..................................................................................................................................................................... 1 2. Normative References ......................................................................................................................................... 1 3. Basic Welding Symbols ....................................................................................................................................... 1 3.1 Distinction between Weld Symbol and Welding Symbol ............................................................................ 1 3.2 Basis of Reference...................................................................................................................................... 1 3.3 Weld Symbols ............................................................................................................................................ 1 3.4 Supplementary Welding Symbols ..............................................................................................................2 3.5 Welding Symbols ....................................................................................................................................... 2 3.6 Placement of the Welding Symbol .............................................................................................................2 3.7 Illustrations ................................................................................................................................................. 2 4. Joint Types ...........................................................................................................................................................4 5. General Provisions for Welding Symbols .........................................................................................................5 5.1 Location Significance of the Arrow .............................................................................................

FAQs

What is the purpose of AWS A2.4:2007?

It establishes a symbol-based method to specify selected welding, brazing, and nondestructive examination information.

How does the standard support symbol use?

It includes detailed information and examples for constructing and interpreting the symbols correctly.

What nondestructive examination details can be specified using this symbol system?

The system supports specifying the examination method, frequency, and extent.

Oct 28, 2026

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