clause5.io/ Welding/ Welder Continuity Log

The 6-Month Rule

The core requirement is straightforward: a welder must use each qualified welding process before the governing code’s inactivity period runs out (under D1.1, a period exceeding six months). If that period passes without the welder welding with a specific process, that process qualification lapses.

ASME IX QW-322.1 (BPVC.IX-2025) states: “The qualification of a welder or welding operator for a process remains valid provided no more than 6 months have passed since the welder or welding operator last used that process.” The rule applies independently to each process — a welder qualified for three processes must use all three within each 6-month window.

D1.1:2025 Clause 6.2.3.1 contains a parallel requirement: a welder’s qualification remains in effect indefinitely unless the welder is not engaged in a given process of welding for which the welder is qualified for a period exceeding six months. When that period of effectiveness has lapsed, Clause 6.25.1.3 requires a requalification test.

The practical consequence: a fabrication shop with 20 welders, each qualified for 2-3 processes, must track 40-60 individual process/welder combinations. Without a systematic tracking tool, lapsed qualifications are inevitable — and discovering them during a third-party audit is a costly compliance failure.

What to Record in the Continuity Log

Neither code prescribes a specific format, but the log must provide enough information for an inspector to verify that each qualification is current. The industry-standard fields include:

Setting Up an Effective Tracking System

Spreadsheet Approach

The simplest method: a shared spreadsheet with one row per welder/process combination. Add conditional formatting to highlight rows where the expiry date is within 30 days (yellow) or past due (red). Update the “last use date” column whenever a welder performs production welding. This works for shops with up to ~30 welders. Beyond that, the manual update burden becomes error-prone.

Database or ERP Integration

Larger fabrication shops integrate continuity tracking into their ERP or quality management system. When a welder logs time against a work order that specifies a welding process, the continuity log updates automatically. This eliminates manual entry errors and provides real-time visibility into which qualifications are approaching their 6-month window.

Alert System

Regardless of the tool, set up automated alerts at two thresholds: 60 days before expiry (warning — schedule the welder for work using that process) and 30 days before expiry (urgent — if no production work is available, consider a maintenance weld or requalification test). Discovering a lapsed qualification after the fact is always more expensive than preventing it.

What Happens When a Qualification Lapses

When the governing code’s inactivity period passes without process use (under D1.1, a period exceeding six months), that qualification is no longer valid. The welder must:

• Stop performing production welding with the lapsed process immediately
• Schedule and pass a new qualification test for that process
• Have the new qualification documented on a new WPQ (Welder Performance Qualification) record
• Update the continuity log with the new qualification date

Any production welding performed with a lapsed qualification is a code violation. Time is not the only limit. Under D1.1 Clause 6.2.3.1, a welder’s qualification remains in effect indefinitely unless the welder is not engaged in the qualified process for a period exceeding six months, or “there is some specific reason to question a welder’s or welding operator’s ability (see 6.25.1).” Clause 6.25.1 sets the retest requirements, including a complete retest of the types and positions failed or in question after further training or practice (6.25.1.2), a requalification test after the period of effectiveness has lapsed (6.25.1.3), and no immediate retest after failure of a requalification retest (6.25.1.4).

Under ASME IX, production welds made by a welder with a lapsed qualification may need to be evaluated on a case-by-case basis by the Authorized Inspector. If the welds were made after the qualification lapsed but before the lapse was discovered, the welds may need to be cut out and re-welded, or the welder may need to requalify and the welds re-evaluated — depending on the Authorized Inspector’s judgment and the construction code requirements.

Audit and Inspection Requirements

The continuity log is one of the first documents requested during quality audits. Here is what each type of audit typically reviews:

AISC certification audits (for D1.1 shops): The auditor verifies that every welder currently assigned to production welding has a valid qualification for each process they are using. The continuity log must show unbroken 6-month windows for every active process. Gaps in the log are audit findings.

ASME Authorized Inspector reviews: The AI verifies welder qualifications as part of the quality system review required by ASME Section I, VIII, or the applicable construction code. The continuity log must be reconciled with production records — if the log shows a welder used SMAW in January, there should be a corresponding production record showing SMAW work performed by that welder in January.

Third-party QA audits: Client or third-party QA representatives frequently request the continuity log during shop visits. They may cross-reference the log against the shop’s WPS list to verify that every WPS in active use has qualified welders with current continuity for the specified process.

Reference tool only. Verify continuity records against the applicable code edition, project specifications, and employer qualification records before accepting production welding.

Key Takeaways

• The 6-month rule is per process, not per welder. Each qualified process must be used independently within its own 6-month window.
• Neither code prescribes a log format — the continuity log is the industry-standard way to show that each qualification is still in effect.
• Prevention is cheaper than correction. Set up 60-day and 30-day alerts. A requalification test costs $200-500; discovering lapsed qualifications during an audit can halt production.
• Tie log updates to production records for traceability. An inspector should be able to trace from the log entry to the work order to the welder’s stencil on the weld.

"Records of the test results shall be kept by the manufacturer or Contractor and shall be made available to those authorized to examine them."

D1.1:2025 Clause 6.3.3

Reference data from ASME BPVC IX:2025 and AWS D1.1/D1.1M:2025. Not affiliated with ASME or AWS.