A Certified Welding Inspector (CWI) credential from AWS is the most recognized welding inspection certification in North America. It qualifies you to inspect welds, review WPSs, verify welder qualifications, and accept or reject welds based on applicable codes. The CWI opens doors to inspection jobs paying $55,000 to $90,000+ annually, and demand consistently outpaces supply.
Getting certified requires meeting education and experience prerequisites, then passing a three-part exam. The exam is demanding, with a roughly 30-40% first-time failure rate. But with proper preparation, it’s very passable.
AWS QC1 Requirements
AWS QC1 (Standard for AWS Certification of Welding Inspectors) defines who can sit for the CWI exam. You need a combination of education and welding-related work experience:
| Education Level | Required Experience |
|---|---|
| High school diploma or GED | 5 years welding-related |
| 2-year welding technology degree | 2 years welding-related |
| 4-year welding engineering/technology degree | 1 year welding-related |
| AWS CAWI (associate level) | Can test at reduced experience, limited scope |
“Welding-related experience” includes hands-on welding, welding supervision, welding engineering, welding instruction, quality control in a welding environment, and NDT on welded products. Pure inspection experience counts, but so does production welding. Many CWIs are former welders who transitioned into inspection.
Vision Requirements
You need near-vision acuity of Jaeger J2 at 12 inches (with or without corrective lenses). This is verified every 3 years as part of the renewal process. You also need natural or corrected color vision capable of distinguishing colors used in inspection (PT dye colors, for instance).
The Three-Part Exam
The CWI exam is administered by AWS at testing centers across the country. It’s given over a single day and consists of three parts:
Part A: Fundamentals (150 minutes, closed book)
Part A tests your knowledge of welding processes, metallurgy, inspection methods, welding symbols, and general welding science. It’s a multiple-choice exam covering:
- Welding process fundamentals (SMAW, GMAW, GTAW, FCAW, SAW)
- Welding metallurgy (heat-affected zones, grain structure, hardness, cracking mechanisms)
- NDE methods (VT, RT, UT, MT, PT)
- Welding symbols (AWS A2.4)
- Weld defects (types, causes, acceptance)
- Destructive testing methods
- Math and conversions
- Safety
- Qualification and certification
This is the section where most people struggle. You can’t look anything up, so you need the information committed to memory. The metallurgy and NDE sections trip up welders who’ve never studied the theory behind what they do.
Part B: Practical (3 hours, open book)
Part B is a hands-on inspection exercise using replica weld specimens. You’ll use weld gauges, rulers, and magnifying lenses to examine specimens and answer questions about:
- Fillet weld size measurement
- Groove weld reinforcement height
- Undercut depth
- Weld profile evaluation
- Porosity sizing
- Reading welding symbols from drawings
- Determining compliance with a code
The specimens are pre-made with specific defects, and you’re measuring and evaluating them against code criteria. Accuracy is critical; getting a measurement off by 1/32 inch can change a pass/fail decision.
Part C: Code Book (2 hours, open book)
Part C tests your ability to find and apply information in a specific welding code. You choose which code book to test with. Options include:
- AWS D1.1 (Structural Welding Code - Steel): Most popular choice
- API 1104 (Pipeline welding)
- AWS D1.5 (Bridge welding)
- AWS D15.1 (Railroad welding)
- ASME Section IX (with ASME Section VIII excerpts)
You bring the code book into the exam and answer questions by looking up specific clauses, tables, and requirements. This tests your ability to find information quickly, not memorize the entire code.
Most candidates choose D1.1 because it’s the most commonly used code in structural fabrication, and preparation materials are widely available. Pick the code you’re most likely to use in your career.
Study Strategy and Timeline
Recommended Timeline: 4 to 6 Months
Months 1-2: Fundamentals (Part A)
- Study welding processes and metallurgy. The AWS Welding Handbook (Volume 1) and the Welding Inspection Technology (WIT) manual are the primary sources.
- Focus on NDE methods, weld defects, and welding symbols
- Take practice exams. If you’re scoring below 72% (the passing threshold), you need more study time
Months 2-3: Code Book (Part C)
- Buy your chosen code book and start reading it cover to cover
- Tab and highlight your code book. You can bring it into the exam with tabs, notes, and highlighting (check current AWS rules on what’s allowed)
- Practice finding information quickly. Time yourself answering code questions. You have about 2 minutes per question
Months 3-4: Practical (Part B)
- Practice with weld gauges. Buy or borrow a set: fillet gauge, hi-lo gauge, bridge cam gauge, taper gauge
- Practice measuring actual welds. Measure fillet legs, throat dimensions, reinforcement height, undercut depth
- Take a hands-on prep course if possible
Month 5-6: Review and Practice Exams
- Take full-length practice exams under timed conditions
- Focus on your weakest areas
- Re-read code book sections you’re not confident in
Prep Course vs. Self-Study
AWS offers a week-long CWI seminar that costs around $2,500 to $3,000. Third-party prep courses range from $1,500 to $3,000. These are helpful but not required. Plenty of people pass on self-study alone.
A prep course makes the most sense if:
- You don’t have a strong theory background (never studied metallurgy formally)
- You learn better in a classroom setting
- Your employer is paying for it
- You failed a previous attempt and need structured review
Self-study works if:
- You have a solid welding education background
- You’re disciplined with a study schedule
- You use quality study materials (WIT manual, practice exams, code book)
Passing Scores
Each part requires a minimum of 72% to pass. You must pass all three parts. If you fail one part, you can retake just that part on a subsequent exam date (within a specified time frame). If you fail two or three parts, you must retake all failed sections.
After You Pass: Maintaining Your CWI
Renewal Cycle
CWI certification is valid for 3 years. To renew, you must:
- Accumulate continuing education points (80 points per 3-year cycle)
- Pass a vision test (Jaeger J2 at 12 inches)
- Pay the renewal fee
- Maintain professional activity in a welding-related capacity
Continuing Education Points
Points come from attending AWS seminars, conferences, college courses, and other qualifying activities. Points can also come from publishing welding-related articles, teaching, and participating in AWS committees.
After 9 years (three successful renewals), you become eligible for “CWI by experience” renewal, which reduces the continuing education requirement.
Endorsements
AWS offers endorsements that expand your CWI scope:
- D1.1 Endorsement: Demonstrates specific D1.1 expertise
- API 1104 Endorsement: For pipeline inspection
- D1.5 Endorsement: For bridge inspection
These aren’t required, but they show specialized knowledge to employers.
CWI Salary Expectations
CWI pay varies significantly by location, industry, and experience:
| Experience Level | Industry | Typical Salary Range |
|---|---|---|
| Entry-level CWI (0-2 years) | Structural fabrication | $50,000 - $60,000 |
| Mid-career CWI (3-7 years) | General industrial | $60,000 - $78,000 |
| Senior CWI (8+ years) | Industrial/power | $75,000 - $90,000 |
| Traveling CWI | Pipeline, shutdowns | $80,000 - $120,000+ |
| CWI + SCWI | Management, consulting | $85,000 - $110,000 |
| CWI + NDT Level III | Specialized inspection | $90,000 - $130,000 |
Traveling CWIs earn the most due to per diem ($75-150/day), overtime, and travel premiums. Pipeline and industrial shutdown work pays particularly well but requires living on the road.
Stacking certifications increases earning power significantly. A CWI who also holds NDT certifications (UT Level II, RT Level II) or a Senior CWI (SCWI) credential is considerably more valuable than a standalone CWI.
What CWIs Actually Do on the Job
The daily work depends on the setting:
Shop inspection: Review WPSs, verify welder qualifications, perform visual inspection on production welds, witness NDE testing, document findings, manage NCRs (non-conformance reports), interact with QA/QC management.
Field inspection: Travel to job sites, inspect field welds, verify preheat, check fit-up before welding, witness production welding, coordinate NDE crews, write inspection reports.
Pipeline inspection: Walk the right-of-way, inspect every joint (often by RT), verify procedure compliance, handle repair dispositions, interface with the pipeline company’s quality representative.
A CWI is not just a “weld checker.” You’re a quality assurance professional with authority to accept and reject work. Understanding the codes, knowing what you’re looking at, and being able to explain your decisions clearly are core skills.
Is CWI Worth It?
For welders looking to transition out of the booth, the CWI is one of the best career moves available. It takes your hands-on knowledge and adds the code knowledge and documentation skills that inspection requires. The work is less physically demanding than production welding, the pay is competitive or better, and the career runway is longer (many CWIs work into their 60s and beyond).
The investment of $2,000 to $5,000 and 4 to 6 months of study pays back within the first year through higher earnings. If you’ve been welding for 5+ years and want to move up without going into management, the CWI is the credential to get.