A welder continuity record is the document that proves an individual welder has remained active within the scope of their ISO 9606 qualification — continuously, without interruption beyond the standard’s defined thresholds. It is not a certificate. It is an ongoing log, updated at defined intervals, that sits between the initial qualification test and the expiry or renewal event.
For quality managers and welding coordinators, the continuity record is often the single most common gap found during customer or third-party audits. The qualification certificate looks fine. The welder worked regularly. But no one kept the log.
This guide covers what the record must contain, how ISO 9606-1 frames the continuity requirement, a practical template, and the most frequent mistakes that silently invalidate a qualification.
What ISO 9606-1 says about continuity
ISO 9606-1 is the foundational standard for qualification testing of welders in fusion welding — specifically for steels. The series also covers aluminium (ISO 9606-2), copper (ISO 9606-3), nickel (ISO 9606-4), and titanium (ISO 9606-5).
The standard defines qualification validity in two linked concepts:
The 6-month activity rule
A welder must have used the relevant welding process within the previous 6 months. This is the minimum continuity window. If a welder stops using a specific process for more than 6 months, the qualification for that process lapses — regardless of whether the 2-year formal period is still open.
This rule is the most commonly misunderstood. The 2-year formal period does not automatically protect a welder who rotated out of a process for a seasonal project gap. Activity must be demonstrable at every 6-month checkpoint.
The 2-year reconfirmation cycle
ISO 9606-1 requires confirmation of welder qualification at intervals not exceeding 2 years. This confirmation may come from:
- A re-test (full or partial)
- Or documented evidence that the employer is satisfied with the welder’s work in service — typically through production records, NDT reports, visual inspection records, or a responsible welding coordinator (RWC/IWE/IWT) statement
The employer’s documented confirmation at 2 years is the main route for most production operations. The continuity record is the log that makes this confirmation audit-defensible.
Continuity is process-specific. A welder qualified in GMAW (135) and SMAW (111) must demonstrate activity in each process separately. Twelve months of GMAW work does not preserve an SMAW qualification that went unused.
What the record must contain
ISO 9606-1 does not prescribe a specific form. It defines the informational requirements. Your continuity record must capture enough data to answer a single auditor question: “How do you know this welder’s qualification is still valid today?”
A compliant record needs:
| Field | Purpose |
|---|---|
| Welder ID / name | Unique identification — never rely on name alone |
| Certificate number | Links to the formal qualification document |
| Welding process (e.g. 135, 111, 141) | Scope — must match the work being performed |
| Filler metal and material group | Defines the range covered |
| Position and thickness range | Qualification scope from original test |
| Date of last activity | Proves 6-month rule compliance |
| Nature of activity | What production work was performed |
| Confirming person | RWC, IWE, IWT, or responsible QA function |
| Confirmation date | Date of employer’s periodic review |
| Next review due | Calculated from confirmation date |
| Status | Active / At risk / Suspended |
The record is a living log, not a one-time document. Each 6-month checkpoint and each 2-year confirmation should produce a new dated entry, not overwrite the previous one.
Continuity record template
Below is a minimal working template you can adapt to your QMS format. Each row represents one confirmation event.
Welder name: ________________ ID: ________________
Certificate reference: ________________ Issuing body: ________________
| Date | Process | Activity (weld ref / lot / job) | From period | To period | Confirming person | Role | Status |
|---|---|---|---|---|---|---|---|
| 2025-01-10 | 135 | Job WO-2024-118, 5 weld seams S355, PB | 2024-07-01 | 2024-12-31 | M. Rossi | RWC | Active |
| 2025-07-08 | 135 | Job WO-2025-044, 8 weld seams S235, PA/PB | 2025-01-01 | 2025-06-30 | M. Rossi | RWC | Active |
| 2025-07-08 | 111 | — | 2025-01-01 | 2025-06-30 | M. Rossi | RWC | Suspended |
In the example above, the SMAW (111) process has been suspended because no production activity was recorded in the preceding 6-month window. The welder would need a re-test or a short production sample under supervision to reinstate it.
Minimum frequency for entries: every 6 months per process. If your review cycle is quarterly, record all processes at each review regardless of change. More entries create a stronger audit trail, never a weaker one.
Common mistakes that invalidate continuity
1. Confusing certificate validity with continuity
A certificate issued 18 months ago is still within its 2-year window — but if the welder did not use the process in the last 7 months, the qualification is lapsed. These are independent checks. Always verify both.
2. Recording only renewals, not intermediate confirmations
Some operations create a new continuity record only when the 2-year confirmation is due. This leaves gaps. An auditor can ask for evidence of activity at the 6-month points, not just at year 2. If you have no log for those intermediate periods, you cannot prove continuity.
3. Using collective entries for multiple welders
“All welders active on project X” is not a valid continuity record. Each welder must have individual, identified entries linked to their certificate number. Collective records fail during audits that pull a specific welder’s history.
4. Listing process codes that do not match actual work
If your continuity record lists 136 (FCAW-M) but the welder was actually running 138 (FCAW-B), the record does not confirm continuity for 138. Scope alignment between what is recorded and what was performed is critical.
5. No confirming person identified or role unclear
The ISO 9606-1 confirmation relies on the employer being satisfied. That means a named individual with a defined responsibility for weld quality — not just an anonymous QA stamp. IWE, IWT, EWT, or the documented RWC of record are appropriate roles.
If your operation is certified to EN 15085 (railway) or ISO 3834 (general fusion welding quality), continuity records are not just a welder management tool — they are a defined system requirement. Auditors from your certification body will trace individual records during surveillance audits. Gaps here generate nonconformities against the QMS, not just the individual qualification.
Integrating continuity records into your QMS
Decide who owns the record
In most operations, the welding coordinator or quality manager owns the record. The decision matters because it determines who is accountable when a gap appears. Assign ownership explicitly in your quality plan or procedure.
Set review triggers, not just review dates
Calendar-based reviews (“first Monday of each quarter”) work in stable teams. For operations with rotating shifts, project-based assignments, or seasonal peaks, event-based triggers are more reliable: every time a welder starts a new project type, every time a process goes unused for 3+ months, every time a qualification is about to reach its 12-month mark.
Link continuity to assignment control
The continuity record is most powerful when it is directly connected to production assignment decisions. Before a welder is assigned to a joint that requires a specific process, position, or material group, the system should confirm their qualification is active for that exact scope. This is where digital welder qualification tracking eliminates manual risk.
Preserve historical records
ISO 3834 and EN 15085 both require traceability of welder qualifications through the life of the product. For pressure vessels, railway components, and structural elements, this may mean keeping records for 10+ years. Design your filing system for retrieval, not just storage: indexed by welder ID, process, and date range.
Paper vs digital: what changes in the record itself
The continuity record can be a signed paper form, an Excel workbook, or a field in a welding QMS. The format is not the requirement — the content and date integrity are.
What digital systems add:
- Automatic calculation of next review due dates
- Alerts when a process approaches the 6-month inactivity threshold
- Automatic status change from Active to At Risk to Suspended based on activity data
- Exportable evidence packs for audits
What they cannot replace:
- The judgment of the confirming person, who must evaluate whether the production work performed is representative of the qualification scope
- The physical signature or authenticated entry that makes the confirmation legally traceable
For operations with more than 10–15 active welders across multiple processes, the administrative overhead of a manual system almost always leads to gaps. The digital tracking approach does not change what the standard requires — it changes whether you can reliably meet it at production scale.
Key standards references
- ISO 9606-1:2012+AMD1:2017 — Qualification testing of welders: fusion welding, steels
- ISO 9606-2 through 9606-5 — Series extensions for aluminium, copper, nickel, titanium
- ISO 3834-2:2021 — Quality requirements for fusion welding of metallic materials: comprehensive requirements
- EN 15085-2:2020 — Railway applications: welding of railway vehicles, requirements for welding manufacturer
- EN ISO 14731:2019 — Welding coordination: tasks and responsibilities
External references:
Keep every qualification audit-ready
Therness helps welding manufacturers maintain continuity records, track qualification scope, and produce audit-ready evidence — automatically.
Book a demo
