Few trades are as easy to test objectively as welding. Put a welder in a booth with the project procedure, have them weld a coupon in the required position, and examine the result. The weld either meets the criteria or it does not. Yet welder assessments are often run loosely: wrong position, wrong material, results judged by eye, records incomplete. Assessing welders before industrial deployment properly is the single most effective way to avoid repairs and site rejections. This guide sets out how to run an assessment program, for QA/QC managers, welding engineers, recruiters and contractors.
Screening criteria for welders, the must-haves and red flags, are covered in screening criteria for welders, fitters and technicians. Here the focus is running the test itself.
What does a welder assessment involve?
A welder assessment combines a review of the welder’s documents and experience with a practical welding test to the project’s procedure, followed by objective examination of the test weld and a recorded result.
Step 1: Review documents first
Before a candidate enters the test booth, check:
- Previous welder qualification records, including process, position, material and thickness range
- Evidence of continuity, since qualifications can lapse if a process is not used for a set period under codes such as ASME Section IX
- Identity, so the person tested is the person deployed
- Experience on comparable work
Certificates should be verified rather than simply collected, as explained in how industrial employers verify trade certificates.
Step 2: Plan the test to match the job
| Test parameter | Match it to |
|---|---|
| Process | The process or combination in the project WPS |
| Position | The most demanding position the welder will use, often 6G for pipe |
| Material | The project’s material group, such as carbon steel or stainless |
| Thickness and diameter | The range the welder must be qualified for |
| Procedure | The project WPS, issued to the welder before the test |
A test that does not match the job proves very little. A welder tested on carbon steel plate in the flat position has not shown they can weld stainless pipe in 6G.
Step 3: Run the test properly
- Use calibrated equipment and the correct consumables, stored properly
- Have a qualified inspector witness the test, and mark each coupon with the welder’s ID
- Check fit-up and preheat before welding starts
- Watch technique and parameters during welding
- Record any stops, restarts or irregularities
Step 4: Evaluate objectively
- Visual inspection of the finished coupon for profile, undercut, surface porosity and cracks.
- Radiography or ultrasonic testing of the coupon, or bend tests, depending on the code and project requirements.
- Acceptance against the stated criteria, not against an assessor’s impression.
Common reasons for failure, such as lack of fusion, porosity and slag, are described in common welding defects detected by inspection.
Step 5: Record and decide
Record the result, the coupon identification, the examination reports and the assessor’s signature. Issue or update the welder’s qualification record where the test qualifies them. Candidates who fail narrowly may be offered a retest after feedback or training, under a clear policy agreed in advance.
Site re-tests
Many clients require welders to be re-tested on arrival at site, even after testing at source. Treat this as confirmation, not duplication: if source testing is done well, site re-test failures should be rare. When they are not, review how the source tests are run.
Tracking assessment against site performance
Compare test results with site repair rates over the first months. If welders who pass the test still produce high repair rates, the test is too easy or not representative. This feedback loop keeps the assessment honest. The wider approach to competency testing is described in technical competency assessment for industrial workers.
Welder assessment with Apex Core Engineering
Apex Core Engineering trade-tests welders against client procedures before deployment, as part of its manpower selection services. Its training arm, MTTI, runs welding programs and test facilities across campuses in Pakistan, and the company lists affiliations with welding and inspection bodies including TWI and AWS.
Frequently asked questions
Should every welder be tested before deployment?
Yes, for any welding on pressure equipment, piping or structural work. Certificates alone do not show current ability.
What test position is used for pipe welders?
Commonly 6G, because it covers all positions, but the test should match the project’s requirements.
How are welder test coupons examined?
By visual inspection followed by radiography, ultrasonic testing or bend testing, according to the applicable code and project specification.
What happens if a welder fails the test?
They are not deployed for that work. Depending on the employer’s policy, they may retest after feedback or further training.
Arrange welder testing with Apex Core Engineering.