Welder Performance Qualification (WPQ) Under AWS D1.1

A Procedure Qualification Record proves that a welding procedure produces a sound weld. A Welder Performance Qualification proves that a specific person can execute that procedure with acceptable workmanship. Shops frequently keep their PQRs current and let their WPQs drift — and auditors know this.

PQR vs WPQ: Why Both Must Be Current

The procedure qualification process is typically done once per procedure and then maintained indefinitely as long as essential variables stay within qualified ranges. WPQs are more dynamic: they are welder-specific, process-specific, and subject to lapse if the welder doesn't stay active.

A job with a solid WPS backed by a current PQR still fails inspection if the welder assigned to it holds an expired or out-of-scope WPQ. Auditors pull both documents, and the combination is what gets the work accepted.

What Triggers a WPQ Test

A welder must test — or retest — before production assignment when:

• The welder has never been qualified on the relevant process (SMAW, GMAW, FCAW, GTAW, SAW, and so on)
• The welder's previous qualification has lapsed under the 6-month continuity rule
• The new work falls outside the position or thickness range the existing WPQ covers
• The contract, owner specification, or AHJ requires retesting regardless of existing records

AWS D1.1 Clause 6 governs performance qualification. Test coupons are typically groove welds in plate or pipe. Pass/fail criteria: visual inspection plus nondestructive examination — usually bend tests, radiographic testing (RT), or both, depending on the test coupon configuration.

Rule library based on AWS D1.1:2025; verify against your governing edition.

Test Positions and Qualification Ranges

The position in which a welder tests determines which positions they are qualified to work. AWS D1.1 uses a tier system where higher-difficulty test positions cover lower-difficulty work positions.

Plate groove weld positions:

Pipe groove weld positions:

The 3G+4G plate combination and the 6G pipe test are the most versatile qualifications and the ones most production shops pursue. A welder holding a current 3G+4G WPQ can be assigned to virtually any structural plate joint orientation without scope issues.

Fillet weld qualification is generally covered by groove weld qualification in the equivalent or higher-difficulty positions. Confirm with the applicable clause and your CWI before assuming cross-coverage.

Vertical Up vs Vertical Down

Vertical welding position (3G) qualification is specific to the direction of progression used during the test. A welder who tested vertical uphill (3G-up) is not automatically qualified to weld vertical downhill unless the WPS permits downhill travel and the welder was tested in that direction. Downhill travel is typically restricted to fillet welds and certain GMAW short-circuit applications on thinner material.

If the production WPS requires vertical uphill progression (as most structural WPSs for groove welds do), confirm the welder's WPQ reflects the uphill test.

Essential Variable Changes That Void a WPQ

The performance qualification essential variable list is shorter than the procedure essential variable list in Table 6.6, but the items it does include reset qualification:

• Welding process — any change in process (SMAW to GMAW, FCAW to GTAW, etc.) requires a new test in the new process
• Deletion of backing — a welder qualified with backing must retest when the WPS requires an open-root joint
• Position — work outside the qualified position range requires a new test or an additional test in the needed position
• Filler metal F-number group — significant F-number changes (for example, moving from F4 to F6 for chrome-moly work) require retesting

Notably, many procedure-level changes that would force a new PQR do not require a new WPQ. Changing from A36 to A572 Gr.50 base material (both in the same D1.1 material group) may require a new PQR under certain circumstances but does not reset the welder's performance qualification. The WPQ is about skill, not metallurgy.

The 6-Month Continuity Rule

If a welder does not deposit production welds using a specific process for six consecutive months, the WPQ for that process lapses. The welder must retest before returning to production work.

This is where most shops get caught. A project finishes, a welder is reassigned to a different process for most of the winter, and twelve months later nobody has noticed the GMAW qualification lapsed. An auditor pulling WPQ records and cross-referencing production weld logs will find it immediately.

The 6-month continuity rule and the tracking overhead it creates are why shops with more than a handful of welders move away from spreadsheets. When the expiry window is rolling and process-specific for every welder on the roster, manual tracking becomes the risk, not the safeguard.

Documentation Requirements

Each WPQ record must include at minimum:

• Welder's name and stamp number (or other unique ID)
• Date of the qualification test
• Welding process used
• Filler metal classification
• Position(s) tested (and direction of progression for vertical)
• Base material type and coupon thickness
• Test results: visual, RT, or bend test results as applicable
• Signature of the witnessing CWI or Inspector

The record must be retained as long as the welder is employed and producing code-controlled welds, and must be made available for review on request. Missing or incomplete WPQs are among the most common findings in third-party QC audits.

Maintaining a Qualification Matrix

A shop with even a moderate workforce needs a living document mapping each welder to their qualified processes, positions, and the date of their last production weld in each process. Without it, continuity tracking is reactive: you find the lapse after the audit, not before.

The shop's QC manager or CWI should review the matrix before every project kickoff, checking that the welders assigned to the job hold current, in-scope WPQs. A signature on a traveler is not a substitute for a valid WPQ on file.

WPQ tracking, expiry alerts, and a printable qualification matrix are built into the welder roster at wpswelding.com/pricing — no separate spreadsheet required.

What a CWI Checks Before Signing Off on a WPQ

When reviewing a welder's records for a new job assignment, verify:

1. The WPQ covers the process specified in the production WPS
2. The WPQ covers the position(s) the welder will encounter
3. The last production weld in that process falls within the past six months (check both the original test date and the most recent production entry, not just one or the other)
4. The WPQ reflects the backing condition the WPS requires — open root qualification is separate from backing-supported qualification

A CWI review checklist that includes WPQ verification as a line item — not a footnote — is the simplest way to keep this from becoming an audit finding.