Unlike electricians or plumbers, welding in New Zealand does not have a single, government-mandated licence that all welders must hold. However, that doesn't mean anyone can pick up a torch and call themselves a professional welder — qualifications, certifications, and site-specific requirements vary significantly depending on the type of work being done. Here's what you need to know.
No Universal Welding Licence — But Qualifications Still Matter
Welding is not classified as restricted building work or a licensed trade in the same way as electrical or gas work. There is no equivalent of the Electrical Workers Registration Board or the Plumbers, Gasfitters and Drainlayers Board for welders. This means a homeowner can legally do basic welding on their own property without a formal qualification — but professional welders working commercially are expected to hold recognised credentials.
NZQA Qualifications for Welders
Most professional welders in New Zealand gain their skills through the New Zealand Qualifications Authority (NZQA) framework. Common pathways include:
- New Zealand Certificate in Welding (Level 3 or 4) — covers core welding processes such as MIG (GMAW), TIG (GTAW), MMA (stick), and flux-cored arc welding
- Unit standards assessed through Industry Training Organisations (ITOs) or polytechnics such as Weltec, Ara, or Unitec
- Apprenticeships through Competenz (the ITO for engineering and manufacturing trades)
These qualifications demonstrate competency in welding technique, safety, and material knowledge, and are what most employers and contractors will ask to see.
Specialised Certifications for High-Risk Welding
Certain types of welding carry significant safety risks and require specific certifications beyond a general qualification.
Pressure Vessel and Boiler Welding
Welding on pressure vessels, boilers, and pressure piping is tightly regulated under the Health and Safety at Work Act 2015 and WorkSafe NZ's plant regulations. Welders working on these items typically need to hold a welder qualification tested to AS/NZS 2980 (the standard for qualification of welders for fusion welding of steel). This involves practical weld tests assessed by an approved testing body.
Structural Steel Welding
For structural steelwork on buildings and infrastructure, welders are often required to be qualified to AS/NZS 2980 or work under a welding supervisor who holds a Welding Supervisor Certificate (often aligned with AS 2214). The NZ Building Code and standards such as NZS 3404 (Steel Structures Standard) set out requirements for structural steel connections, and councils may require evidence of welder qualifications as part of a building consent.
Pipeline and Infrastructure Welding
Welding on gas pipelines, water infrastructure, and similar critical assets typically requires welders to be qualified to specific project or client standards, and work is often audited by the asset owner or an independent inspector.
WorkSafe NZ and Health & Safety Obligations
Regardless of qualification level, all welders working commercially must comply with the Health and Safety at Work Act 2015. This includes:
- Proper PPE (welding helmet, gloves, protective clothing)
- Adequate ventilation to manage fumes (particularly important with galvanised steel, stainless steel, or coated materials)
- Hot work permits on many commercial and industrial sites
- Safe storage and handling of gas cylinders
WorkSafe NZ publishes guidance on welding hazards, including fume exposure limits. Employers have a duty to manage these risks under the Act.
Building Consent Considerations
If welding forms part of a building project — for example, fabricating a structural steel frame or installing a balustrade — a building consent may be required depending on the scope of work. Schedule 1 of the Building Act lists certain exemptions, but always check with your local council before starting work. For consented work, councils may ask for evidence that welding was carried out by a suitably qualified person.
For more on building consents and what requires one, see MBIE Building Performance.
What About Coded Welders?
You may hear the term "coded welder" — this refers to a welder who has passed a specific weld test to a recognised standard (such as AS/NZS 2980 or an international equivalent like ISO 9606 or ASME IX). A code is not a licence but rather proof that a welder can produce a weld meeting a defined quality standard in a specific process, position, and material. Codes are typically required on:
- Pressure equipment
- Structural steel projects
- Oil, gas, and water infrastructure
- Marine and aerospace fabrication
Codes must be renewed periodically (usually every two years) through continued practice or re-testing.
When to Call a Professional
For most structural, pressure, or safety-critical welding, you should always engage a qualified, experienced professional welder. This is especially important when:
- The weld is load-bearing or structural
- You are working with pressure vessels, gas lines, or boilers
- A building consent requires certified workmanship
- You are on a commercial or industrial site with specific entry requirements
A professional welder will carry evidence of their qualifications and, where required, their current weld codes. You can find qualified local welders and fabricators on tradedirectory.co.nz.
Safety note: Welding produces intense UV radiation, heat, sparks, and hazardous fumes. Never attempt welding without proper training and PPE, and ensure your workspace is well ventilated and free of flammable materials.
Site Safe
SiteWise
ISO 9001
