Is NDE required on all AWS D1.1 structural welds?

Visual testing (VT) is required on all welds. MT, PT, UT, and RT are required based on the inspection category, weld type, and any contract or owner requirements. Statically loaded structures have different NDE requirements than dynamically loaded or seismic structures.

Who can perform UT under AWS D1.1?

AWS D1.1 Annex I defines UT qualification requirements — typically equivalent to ASNT SNT-TC-1A Level II in UT. The inspector who scans and the inspector who accepts or rejects may differ. Check Annex I for the full personnel qualification requirements.

What's the most common NDE finding in a third-party audit?

Missing or unsigned NDE reports. The scan happened; the record didn't get filed or wasn't signed by a qualified inspector. The weld may be perfectly sound, but without the record the audit treats it as unverified.

Does the NDE report need to reference the WPS?

Yes. Traceability from the weld back through the WPS and WPQ is the audit chain. An NDE report without a WPS reference breaks that chain. The report should list the weld number, welder stamp, applicable WPS, and acceptance criteria used.

AWS D1.1 NDE documentation: the audit packet checklist

VT, MT, PT, and UT records all belong in an AWS D1.1 audit packet. Here's what each NDE type records and how auditors verify the chain of traceability.

Non-destructive examination records are the last link in the weld-quality chain. A sound weld with no NDE record looks identical to an untested weld to an auditor. The record is the evidence.

Here's what an AWS D1.1–compliant NDE audit packet needs to contain, and how each examination type connects back to your WPS.

The four common NDE methods under AWS D1.1

Visual Testing (VT) is the baseline. AWS D1.1 requires visual inspection on all welds — it is the first examination performed and the least expensive. Acceptance criteria for VT cover undercut depth, weld reinforcement height, weld size against the WPS, surface cracks, and crater fills. A VT that fails halts additional processing. There is no benefit to performing UT on a weld that already has a rejectable visual indication.

The VT record should include: weld identification, inspection date, inspector name and credential, result (accept or reject), and any rejectable conditions noted.

Magnetic Particle Testing (MT) detects surface and near-surface discontinuities on ferromagnetic materials. Under AWS D1.1, MT is typically required on complete joint penetration (CJP) groove welds in dynamically loaded structures, repair welds, and welds subject to calculated fatigue loading. Some contracts require MT on all structural welds regardless of loading category.

MT records document: examination area, examination method (dry powder, wet fluorescent, yoke, prod, or coil), magnetization current and technique, equipment calibration reference, inspector certification level, and result.

Liquid Penetrant Testing (PT) is the surface method for nonferromagnetic materials and austenitic stainless steel. Under AWS D1.6 (stainless), PT is the standard surface method. Under D1.1 carbon steel, MT is generally preferred where it applies; PT is used for access-limited areas where MT isn't practical or for post-weld heat-treated surfaces where magnetization would re-contaminate.

PT records document: surface condition at time of examination, penetrant system used (Type and Method per ASTM E165), dwell time, developer application time, inspector certification, and result.

Ultrasonic Testing (UT) is the primary volumetric method for AWS D1.1 full-penetration welds. It detects internal planar discontinuities — lack of fusion, incomplete penetration, cracks — that VT and MT cannot reach. AWS D1.1 Annex I defines the UT procedure and personnel qualification requirements.

The UT record is the most complex: it requires the scan plan, calibration data and calibration block reference, equipment model and serial number, transducer frequency and angle, scan coverage diagram, and a weld-by-weld indication log. Any indication that requires evaluation under the code acceptance criteria must be reported with its amplitude, indication length, depth, and disposition.

Traceability: the audit chain

Every NDE record must trace back to:

The weld — identified by weld number, joint location, or drawing callout
The welder — stamp or ID, with WPQ on file
The WPS — by WPS number; the WPS governs the procedure that produced the weld being examined
The applicable code and edition — acceptance criteria differ between editions; a report referencing AWS D1.1:2020 criteria on a 2025 project is a traceability issue

The auditor traces the chain in both directions: from the NDE record to the WPS, and from the WPS to the supported welds and their NDE records. A break anywhere in the chain is a finding. See welder qualification (WPQ) traceability to the WPS for how the WPQ side of this chain should be structured.

What auditors check first

Third-party auditors — AISC certified fabricator audits, customer quality audits, or owner-mandated inspections — follow a consistent review pattern for NDE:

Inspector certifications. Are the NDE inspector credentials current and documented? For UT, AWS D1.1 Annex I qualification is required. For MT and PT, ASNT SNT-TC-1A Level II is the standard. Certifications should be on file, not just referenced on reports.

Calibration records. UT calibration blocks and procedures must be documented and traceable to a calibration standard. If the UT instrument calibration record is not on file, the UT results are suspect.

Report completeness. Does every weld that required examination have an NDE report? Missing reports on required welds are the most common NDE-related finding.

Acceptance criteria stated. The report should state which code edition's criteria were applied. See AWS D1.1:2025 vs 2020 changes for the differences that affect acceptance criteria interpretation. The edition applied should match the edition specified in the contract or governing specification.

Rejection and repair records. Any rejected indication should have a rejection record, a repair WPS or written disposition, and a re-examination record. Incomplete repair documentation is a finding even if the weld was ultimately accepted after rework.

Organizing the NDE packet

An effective audit-ready NDE packet is organized by weld, not by examination method. For each weld:

VT report
MT or PT report (if required by code or contract)
UT report (if CJP groove weld or otherwise required)
Repair records (if applicable)
Re-examination reports (if applicable)

Then, a master set of supporting documents:

Inspector certifications (all NDE personnel)
Equipment calibration records
Applicable examination procedure documents (MT procedure, UT procedure, PT procedure)

A cover sheet for each weld that lists the required examinations with check boxes — complete, not required, or pending — makes it immediately visible during an audit whether any required examination is outstanding. Auditors appreciate this; it also forces the QC manager to confirm the examination scope before the packet is assembled.

The WPS connection

The WPS doesn't specify NDE method — that's a design and code requirement, not a welding procedure requirement. But the NDE record should reference the WPS because the WPS establishes the procedure that produced the weld being examined. If the WPS is invalid (unsupported by a PQR, essential variable violation per Table 6.6, unsigned), the NDE report's acceptance doesn't save the weld — the procedure itself is in question.

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

This is why common WPS deficiencies found in third-party audits often involve the WPS-to-NDE traceability chain rather than weld quality itself. The weld may be sound; the documentation frequently isn't. Getting the WPS library clean before an audit removes the most common single point of failure in the NDE package.

For shops managing NDE records alongside WPS and WPQ documentation, audit-ready package generation with weld traceability is available in Pro and Shop plans.