Commonly Used Welding Codes

What are Welding Codes

Welding codes are a set of standards and guidelines that are used to ensure quality and safety in welding. They define the requirements for welding procedures, materials, testing, and inspection.

Welding codes are developed and maintained by various organizations such as the American Welding Society (AWS), International Organization for Standardization (ISO), and others. In this article, we will discuss some commonly used welding codes.

American Welding Society (AWS) Codes

The AWS codes are widely used in North America and are recognized by many countries around the world. The most commonly used AWS codes are:

International Organization for Standardization (ISO) Codes

The ISO codes are developed by the International Organization for Standardization and are used worldwide. The most commonly used ISO codes are:

American Society of Mechanical Engineers (ASME) Codes

The ASME codes are used in the United States and are recognized worldwide. The most commonly used ASME codes are:


Welding codes are an essential part of the welding industry. They ensure quality and safety in welding and provide a set of standards and guidelines for welding procedures, materials, testing, and inspection. By following these codes, welders can produce high-quality welds that meet industry standards and customer expectations.

Some Questions and their Answers

Why are welding codes important?

Welding codes play a crucial role in maintaining consistency, safety, and quality in welding operations. They provide guidelines for weld design, material selection, welding procedures, inspection, and testing, helping to ensure that weldments are fit for their intended purpose.

Do welding codes vary by country or region?

Yes, welding codes can vary by country or region. Different countries may have their own national welding codes or may adopt international codes such as those issued by ISO or AWS. It is important to follow the relevant code applicable to the specific project or jurisdiction.

What is the most widely use welding code?

The American Welding Society (AWS) D1.1 Structural Welding Code is one of the most widely used welding codes in the world. It provides standards for welding in structural steel, including guidelines for qualification of welding procedures, inspection and testing requirements, and acceptance criteria.

The code also covers various welding processes such as Shielded Metal Arc Welding (SMAW), Gas Tungsten Arc Welding (GTAW), and Gas Metal Arc Welding (GMAW), among others. The AWS D1.1 code is intended to ensure the quality and safety of welded structures in a range of industries, including construction, manufacturing, and transportation.

Mig Welding Code

MIG welding is covered by several codes, including AWS D1.1, which covers structural welding, and AWS D1.3, which covers sheet steel welding. These codes specify the requirements for MIG welding in terms of welding procedures, materials, equipment, and inspection. The codes also establish guidelines for testing welds to ensure they meet certain quality standards.

Welding procedures must be qualified through testing to ensure that they meet the requirements of the applicable code. Welders must be trained and qualified to perform MIG welding to the specifications of the code. Additionally, the codes require that welding work be inspected by qualified personnel to ensure that it meets the specified requirements.

What are the 2 major welding codes?

The two major welding codes are the AWS (American Welding Society) code and the ASME (American Society of Mechanical Engineers) code.

Who uses welding codes?

Welding codes are used by a wide range of stakeholders in the welding industry, including engineers, fabricators, welders, inspectors, and regulatory authorities. They provide a common language and framework for ensuring welding quality and compliance.

What is the purpose of welding procedure specifications (WPS)?

Welding procedure specifications (WPS) are documents that describe the specific welding procedures and parameters to be followed in order to meet the requirements of a welding code. WPSs provide detailed instructions for preparing the joint, selecting the welding process, determining the welding parameters, and carrying out the welding operation.

What is the difference between a welding code and a welding standard?

A welding code is a comprehensive set of requirements and guidelines for welding practices, procedures, and quality control, whereas a welding standard typically focuses on a specific aspect or technique of welding. Standards can provide detailed specifications and guidelines for specific welding processes, materials, or applications.

How are welding codes developed?

Welding codes are typically developed by industry organizations, professional associations, or regulatory bodies. These organizations establish committees consisting of experts in the field who review existing practices, conduct research, and collaborate to develop and update the codes based on industry advancements, safety considerations, and feedback from stakeholders.

Are welding codes legally binding?

In many jurisdictions, welding codes are not legally binding in and of themselves. However, they are often referenced by regulatory bodies, industry standards, and contractual agreements. Compliance with applicable welding codes is usually required to ensure that welding work meets the necessary quality and safety standards.

Where can I find welding codes and standards?

Welding codes and standards can be obtained from various sources, including industry organizations, professional associations, and standards development organizations. Some common sources include the American Welding Society (AWS), International Organization for Standardization (ISO), European Committee for Standardization (CEN), and national standards bodies.

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