What Is a Certified Welding Inspector? CWI Job Description

CWI job description

A CWI job description comes down to six duties:

1. Review the documents. Drawings, contract requirements, the applicable code, the welding procedure and each welder's qualification.
2. Verify materials. Base metal and filler match the documents, and consumables are stored and handled correctly.
3. Check fit-up and conditions. Joint preparation, alignment, preheat and settings inside the procedure's ranges.
4. Watch welding in progress. Catch procedure drift and forming flaws while the joint is still open.
5. Examine finished welds. Visual examination first, then size, profile and surface flaws, and confirm any required NDE is done and on file.
6. Accept, reject and record. Mark rejected work, track repairs to re-inspection and write the inspection report.

Each employer sets the actual assignment, so read the posting for the code it works to and how much of the job is in the field. The shift below shows each duty in practice.

A shift, step by step

Before welding starts

Most of the value of an inspector comes before an arc is struck. A shift often opens with a short list:

• Documents. Read the drawing, the contract requirements and the applicable code. Confirm the welding procedure that covers the joint, and check that each welder holds a current qualification for it. The WPS vs PQR vs WPQ explainer shows how those records fit together.
• Materials. Verify base metal and filler are what the documents call for, and that consumables are stored and handled correctly, such as low-hydrogen electrodes kept dry.
• Fit-up. Check joint preparation, alignment, gaps and cleanliness before a welder commits to the joint. A bad fit-up is cheap to fix now and expensive to fix after welding.
• Equipment and conditions. Confirm settings and conditions sit inside the procedure's ranges, including preheat where it's required.

Catching a problem here saves the shop hours of rework, and that's the strongest argument for inspection on any job.

During welding

In-process checks keep small problems from becoming big ones. The inspector walks the work and watches:

• Whether welders follow the procedure: travel speed, technique, interpass temperature, stopping and restarting.
• Whether each pass is cleaned and sound before the next one covers it.
• Whether back-gouging, tack welds and root passes look right.
• Whether a flaw is forming, such as porosity or poor sidewall fusion, which can be corrected while the joint is still open.

This is also where judgment shows. A good inspector explains what they see and why it matters, and keeps the relationship with welders productive. The discontinuities article covers the flaws you'll be looking for.

After welding

Finished welds get a visual examination first, because most codes expect it before any other method. Then the inspector:

• Measures what the drawing and code require: weld size, profile, undercut, reinforcement.
• Looks for surface flaws, and decides whether further examination is needed.
• Verifies that any required NDE was done by qualified people and that the results are on file. The NDE methods guide shows what each method finds.
• Marks rejected work, tells the right person and checks that repairs are made and re-inspected.

The paperwork is the product

An inspection that isn't recorded didn't happen as far as the next person is concerned. Expect to write inspection reports, mark up drawings, log hold points and release points, track nonconformances and keep qualification records straight. Clear, dated and specific beats long. A report that names the joint, the finding, the reference and the action can be acted on by someone who never saw the weld.

O*NET's profile for inspectors describes the same pattern: reading specifications, measuring, recording findings and communicating corrections. It covers inspectors broadly, and each employer sets the actual assignment.

Tools and industries

The tool bag is small and specific: weld gauges for fillet size, undercut and reinforcement, a bright flashlight, a tape or rule, a mirror for hard-to-see roots, a marker and a notebook or tablet. Gauge skills are built by repetition, and the weld gauge reading trainer lets you practice on drawn welds.

Inspectors work across structural fabrication and erection, pipelines, pressure equipment, shipbuilding, heavy equipment and manufacturing. Each runs on its own code, which is why Part C lets you pick one. Some roles keep you in a shop. Others move you from site to site, so travel is a real part of certain jobs.

A day in two settings

A shop inspector often works a steady routine. Parts arrive, fit-up is checked, welding runs through the day and finished assemblies are examined and released. The pace is predictable and the same welders repeat the same joints, so you learn their habits and spot drift early.

A field inspector's day is less predictable. Weather, access and schedule pressure change the plan, and you may inspect at height, in a trench or in tight spaces. You carry more of your own kit, you travel, and you make calls with less backup nearby. Both settings use the same core method: check before, during and after, and write it down. Knowing which setting suits you is a good filter when you read job postings.

Skills that matter beyond the exam

• Reading drawings and symbols fast. Welding symbols are daily language.
• Finding answers in the code. Open-book skill, used every day.
• Measuring honestly. The same reading every time, whoever's watching.
• Communicating plainly. Telling a foreman their weld is rejected, and why, takes tact and evidence.
• Staying calm on a hold point. Production pressure is real. A sound, documented decision is your job.

Next steps

Not sure which AWS level fits you? See CWI vs CAWI vs SCWI. To weigh the credential against its cost, read is the CWI certification worth it.

If this sounds like your work, check whether you qualify with the CWI eligibility checker, which runs your dates against AWS's published experience table. Then see where your knowledge stands. The free 10-question check shows exactly which areas to study first, so you can plan the exam around your gaps. Take the Part A check, or look at the Part B guide if the hands-on side is your worry.

FAQ

What is a certified welding inspector?

A welding inspector who has met AWS's education and work experience requirements and scored 72% or more on each of the three CWI exam parts. A CWI checks welding against the drawings, the procedure and the code before, during and after welding, and records what they found.

Do CWIs weld?

Not as the main job. Many CWIs began as welders and that background helps, but the role is to verify other people's work against requirements. Some employers combine duties, so ask about the job in the posting.

Who hires CWIs?

Fabricators, erectors, pipeline and pressure equipment contractors, inspection and testing firms, shipyards and manufacturers. Some work directly for an owner. Others work for a third-party inspection company.

Do I need experience before I can become a CWI?

Yes. AWS requires a combination of education and welding-related work experience before you can test. The certified welding inspector requirements guide lists the combinations.

What's the next step?

Check eligibility, choose your part order and take the free 10-question check for the part you're most worried about. Let the result decide where your study time goes.