On oil and gas work, a welding failure is not a quality issue. It is a safety and integrity issue with consequences that reach far beyond the weld. That is why trade testing, not paperwork, should decide whether a welder works on your project.
A certificate is not a competence check
Welder qualifications are specific. A certificate reflects a particular process, material, thickness range and position, tested at a point in time. A welder qualified for one configuration is not automatically competent in another, and qualifications can lapse or fall out of continuity. Treating a certificate as a general licence to weld is where most supplier risk begins.
What a real trade test looks like
A meaningful test reflects the work the welder will actually do: the same process, comparable material and thickness, and the positions required on site. It should be conducted under supervision, with the result recorded and traceable to the individual. Where the project applies a written welding procedure, the test should align with it rather than a generic sample.
Continuity and re-testing
Competence decays without practice. Ask when the welder last worked in the qualified configuration and whether continuity has been maintained. On longer projects, periodic re-testing is a reasonable expectation, particularly where welders move between processes.
Verify identity, not just paperwork
Documentation should be traceable to the person on site. Confirm that the individual presenting for work is the person who took the test, and that records can be produced on request during inspection. Loose documentation practices are a common audit finding and an avoidable one.
The cost of getting it wrong
Unqualified welding produces repair work, re-inspection, schedule delay and, on pressure or structural systems, genuine safety exposure. Repairs consume more time than the original weld, and repeated failures can trigger wider inspection of otherwise acceptable work. Compared with that, the cost of proper testing is negligible.
What to ask your manpower supplier
- What process, material, thickness and positions is each welder currently qualified for?
- Who conducted the test, and can we witness testing?
- How is continuity tracked between projects?
- Can you produce records that tie qualifications to the individual?
- What happens, contractually, if a welder fails site testing?
Applies beyond welding
The same principle holds for scaffolders, riggers, electricians and instrument technicians. In each case, the question is whether competence has been demonstrated for the work in front of them, and whether the supplier can evidence it. Suppliers who test properly will answer these questions comfortably. Those who do not will deflect towards price.
UAE Manpower Group trade-tests every worker before deployment across the UAE. To discuss certification requirements for your project, get in touch or call +971 55 926 8606.