Does AWS D1.1 allow PQR testing at foreign laboratories?

Yes. AWS D1.1 sets no geographic restriction on where PQR testing occurs. The lab must demonstrate competence — ISO 17025 accreditation is the standard evidence — and the test report must be in English or bear a certified translation. The engineer of record retains authority to reject non-conforming documentation.

Must WPS and PQR documents submitted from overseas be in English?

Yes, for US structural projects. AISC COSP and standard EOR practice require English-language documentation. Certified translations of PQR test reports are accepted when paired with the original-language source documents.

Can a welder qualified under a foreign standard transfer to a US AWS D1.1 project?

No automatic transfer exists. The EOR or delegated CWI must evaluate equivalency. ISO 9606-1 and EN 287-1 are sometimes accepted after documented technical review, but re-qualification under AWS D1.1 is the most defensible path and is often required by contract.

Do AISC certification requirements differ for overseas fabricators?

No. AISC certification programs (Standard, SBE, CSE, STC) apply the same audit criteria regardless of facility location. Overseas shops pursuing AISC certification undergo the same field audit and must demonstrate AWS D1.1 WPS, PQR, and QC documentation compliance.

AWS D1.1 WPS/PQR Requirements for Foreign Fabricators

US structural projects sourcing from overseas fab shops must meet full AWS D1.1 WPS and PQR standards. What EORs and AISC certified shops verify before approval.

The Standard Applies Globally — Enforcement Is Local

AWS D1.1 contains no geographic carve-out. When a US structural contract specifies AWS D1.1:2025, that code applies whether the steel is fabricated in Dallas, South Korea, or Monterrey. What changes is who enforces it and how the documentation chain reaches the engineer of record (EOR).

For a domestic AISC-certified shop, the oversight path is well-worn: the EOR or their designated CWI reviews WPS submittals, the fabricator's QC manager witnesses PQR testing, and a known accredited lab issues the test report. When that same work flows to an overseas shop — increasingly common on large EPC and design-build projects — the chain gets longer and every link gets scrutinized harder.

This article covers what EORs, AISC-certified prime contractors, and CWI consultants actually check when reviewing welding documentation from a foreign fabricator.

WPS Submittals: Same Standard, Different Risk Profile

A WPS from an overseas shop must meet the same substantive requirements as a domestic one. Under AWS D1.1, a qualifying WPS must either follow the prequalified procedure rules of Clause 5 or be supported by a PQR conducted per Clause 6. The code does not accept a foreign national standard (ISO 15614, EN 15611, or similar) as a substitute — even if the technical content is similar.

In practice, overseas shops familiar with ISO 15614-1 or EN 288 often have the process knowledge but lack AWS-formatted documentation. A WPS that was perfectly adequate under the shop's home standard will be rejected on a US job if it does not address the essential variables listed in AWS D1.1:2025 Table 6.6 (for SMAW, SAW, GMAW, FCAW, and GTAW) and is not signed by a Certified Welding Inspector or equivalent responsible party acceptable to the EOR.

The EOR's submittal review should check:

Process and base metal group match the project steel (AWS D1.1:2025 Table 6.9 base metal groupings)
Essential variables from Table 6.6 are documented — not just present in spirit but explicitly listed
The WPS references a supporting PQR by number, and that PQR is included in the submittal package
The WPS carries a signature/stamp from the responsible welding engineer or CWI

Rule library based on AWS D1.1:2025; verify against your governing edition (the AHJ or contract may specify 2020 or earlier).

PQR Documentation: Lab Accreditation Is Non-Negotiable

The PQR is the factual record of a procedure qualification test — base metal heat number, filler metal classification and lot, as-welded parameters, and the destructive test results (tensile, guided bend, hardness if required, Charpy if CVN is invoked). For a foreign-produced PQR, every one of those data points carries elevated scrutiny because the EOR cannot pick up the phone and call the welding supervisor.

The testing laboratory must be demonstrably competent. ISO 17025 accreditation covering the relevant test methods (tensile per ASTM A370, guided bend per AWS B4.0, Charpy per ASTM A370) is the standard evidence. Some EORs also accept labs accredited by A2LA, NVLAP, or AISC-recognized third-party QA organizations. A shop's internal lab — even a well-equipped one — is generally not acceptable without documented third-party accreditation.

The PQR test report must be in English. Certified translations are accepted but must be paired with the original-language source document so a reviewer can verify the translation is complete. Machine translations (Google Translate, DeepL) are not acceptable — the translation must be certified by a qualified technical translator.

See selecting a PQR test laboratory for the domestic checklist that also applies to foreign lab vetting.

Welder Performance Qualification (WPQ)

This is where foreign fabricators most often run into trouble. A welder who passed an ISO 9606-1 qualification test in their home country holds a valid qualification under that standard — but AWS D1.1 does not recognize it by default.

The EOR or owner must explicitly accept a foreign qualification equivalency in writing before fabrication begins. Many EORs decline to do so, for liability reasons and because the process variables (position, base metal group, filler classification, progression) may not map cleanly between standards. The safest path is re-qualification under AWS D1.1 Clause 6, conducted by a CWI or inspector acceptable to the EOR.

When a project uses an overseas shop repeatedly, some prime contractors establish a standing CWI engagement: a third-party CWI (certified by AWS CWI, B5.1) travels to or is resident at the foreign facility, witnesses PQR and WPQ testing, and provides the independent certification documentation that the EOR requires. This mirrors what a domestic QC vs. verification inspection structure looks like for large domestic projects.

The AISC Certification Question

If the overseas shop holds or is pursuing AISC fabricator certification, the documentation requirements become clearer. AISC certification audits — whether for Standard (STD), SBE, CSE, or STC categories — require the shop to demonstrate a quality management system that includes:

A current WPS library covering the processes and base metals actually used in production
PQR records on file and available for audit
Welder WPQ records tied to production assignments
A QC manager meeting AISC qualification criteria

AISC's Plant Certification program audits overseas shops using the same criteria as domestic facilities. The audit is conducted by an AISC-authorized auditor who travels to the facility. Shops that go through this process often already have their WPS/PQR documentation in acceptable shape by the time their submittal package arrives at the EOR's desk.

For prime AISC-certified contractors managing a supply chain that includes overseas shops, the obligation to verify subcontractor documentation falls on the prime's QC program. See common WPS deficiencies found in third-party audit for what auditors typically flag.

What the EOR's WPS Submittal Review Checklist Looks Like

A practical checklist for reviewing an overseas fabricator's welding procedure submittal:

Document completeness

WPS and supporting PQR(s) included for every process and base metal combination on the project
Documents in English (or certified translation with original attached)
WPS signed/stamped by responsible welding engineer or CWI

Technical compliance

Essential variables (Table 6.6) explicitly documented — process, base metal group, filler classification, position, preheat/interpass, heat input range, current/polarity
PQR base metal heat number recorded and mill cert provided
PQR test lab ISO 17025 accredited for relevant test methods
Tensile, bend, and (if CVN invoked) Charpy results meet D1.1 acceptance criteria
Table 6.6 essential variable limits not exceeded between WPS and PQR

Welder qualification

WPQ records provided for welders assigned to project work
WPQ conducted under AWS D1.1 Clause 6 (or written EOR equivalency acceptance on file)
WPQ date and continuity documented — lapse check required per Clause 6.4.1

QC system

Shop has a designated QC manager or delegated inspection authority
NDE personnel certifications (MT, PT, UT, RT) provided if NDE is specified
EOR has accepted the shop's QC plan in writing before fabrication begins

For projects with complex submittal packages, a WPS library management tool built around AISC audit-readiness practices can centralize document tracking across domestic and foreign subcontractors.

Filler Metal and Consumable Traceability

One detail that catches overseas shops: AWS A5-series filler metal classifications. A shop accustomed to specifying E7018 may be stocking electrodes manufactured to an AWS-equivalent classification but sold domestically under a different standard designation. The electrode used in production and the PQR must bear AWS A5 classification markings, or the EOR must accept a documented equivalency.

Applicable A5 standards include A5.1 (SMAW carbon steel), A5.18 (GMAW carbon steel), A5.20 (FCAW carbon steel), and A5.17 (SAW carbon steel). The mill certification for the filler metal must be in English and identify the AWS classification by code.

Starting the Approval Process Early

The single most common mistake on projects using overseas fabricators is treating WPS submittal as a late-stage activity. By the time the first steel is being cut, the WPS package should be reviewed and approved in principle. PQR testing, if needed, takes three to six weeks to complete and have lab results returned. WPQ testing adds another week if welders need to re-qualify.

For EORs managing AISC-sensitive projects, or for prime contractors whose certification depends on documented subcontractor oversight, early engagement with the overseas shop's QC team — and a clear written scope of the required documentation — prevents the costly situation of completed steel waiting in a foreign port for welding document approval. See the WPS submittal package and EOR review checklist for the full domestic workflow that applies equally to foreign submittals.

If your team is managing multiple WPS submittals across shops in different countries, wpswelding.com/pricing has the workflow tools your QC manager needs to track document status, flag expiring WPQs, and maintain an audit-ready WPS library.