How to Become a Certified Welding Inspector (CWI): A Practical Guide from a Working Wisconsin CWI

A lot of experienced welders reach a point where they start asking what comes next. For many, the answer is becoming an AWS Certified Welding Inspector, or CWI.

It is one of the most recognized credentials in the welding industry. It also opens doors into quality control, inspection, and the kind of work where your judgment carries real weight on a project.

This guide walks through what a CWI does, what the American Welding Society requires, what the exam covers, and how to start preparing. Requirements can change, so always confirm current details directly with AWS before you apply.

What Is a Certified Welding Inspector?

A Certified Welding Inspector is a professional certified by the American Welding Society to evaluate welding work against a specific code, standard, or specification.

Day to day, that can mean:

• Witnessing welder qualification tests and signing the records
• Reviewing welding procedure specifications (WPS) and procedure qualification records (PQR)
• Performing visual inspection before, during, and after welding
• Checking weld size, profile, and discontinuities against acceptance criteria
• Documenting results so the work holds up to an owner, engineer, or auditor

The value of a CWI is not just catching bad welds. It is producing a clear, defensible record that the work met the code the job required.

Step 1: Build Real Welding Experience

AWS requires documented work experience in a welding-related role before you can sit for the CWI exam. The amount required depends on your education. Candidates with more formal education generally need fewer years of experience, while candidates without a high school diploma need more.

Experience can come from welding, fabrication, inspection, welding engineering, or related roles that involve codes and welded products. Keep records of your employers, dates, and job duties now. You will need them for the application.

Step 2: Pass the Vision Test

Visual inspection is the core of the job, so AWS requires candidates to pass an eye exam that covers near vision and color perception. Corrective lenses are allowed.

Step 3: Prepare for the Three-Part CWI Exam

The CWI exam is made up of three parts. You must pass all three to earn the credential.

Part A: Fundamentals

Covers welding processes, metallurgy, joint design, symbols, testing methods, safety, and inspector responsibilities. This is the broad knowledge base.

Part B: Practical

A hands-on section where you use inspection tools like fillet gauges and measuring devices on weld replicas, and apply acceptance criteria from a provided book of specifications.

Part C: Code Application

An open-book test on a specific code, such as AWS D1.1 for structural steel or API 1104 for pipelines. The skill being tested is finding and applying the right clause quickly and accurately.

How to Study for the CWI Exam

• Pick your code book early and learn how it is organized, especially the tables and acceptance criteria
• Tab your code book so you can find key sections fast on test day
• Practice with real inspection tools until reading a fillet gauge is second nature
• Take timed practice exams. Many candidates know the material but run out of time
• Consider a formal CWI seminar, which AWS and other providers offer before exam dates
• Learn from working inspectors. Watching real qualification tests teaches things books cannot

Step 4: Keep Your Certification Current

The CWI credential is not a one-time achievement. AWS requires periodic renewal and, on a longer cycle, recertification, which may involve continuing education or re-examination. Check the AWS certification site for the current schedule and requirements.

Start Building Toward It Now

If you are a welder thinking about inspection, the best thing you can do today is get comfortable with codes. Ask to see the WPS for the work you are doing. Learn what your welds are being judged against. Get qualified on more processes and positions.

Every qualification test you take is also a chance to see how an inspector works: what they look at, what they measure, and how they document it.

Welding Training and Certification Prep in Wisconsin

Fusion Pro Test Training is run by Bob, an AWS Certified Welding Inspector and Certified Welding Educator based in Brookfield. We provide on-site welder certification testing, welding inspection, and one-on-one certification prep for shops and welders within about 100 miles, including Milwaukee, Waukesha, Madison, Racine, and Kenosha.

If you or your crew want to build qualifications on the path toward inspection, contact Fusion Pro with the codes, processes, and positions you want to work on.