Welding Coordinator — Role and Responsibilities
A welding coordinator is responsible for ensuring that every weld on a project is produced to the correct procedure, by a qualified welder, on the correct material, with the correct preheat — and that all of it is documented. Under ISO 14731, the formal title is Responsible Welding Coordinator (RWC). Under AWS D1.1, the same duties are assigned to the Contractor and the Engineer, typically carried out by the senior welding engineer or CWI at the fabrication shop.
The Five Core Responsibilities
Whether the title is RWC, welding engineer, welding supervisor, or CWI, the coordinator function covers five areas.
1. WPS Management
The coordinator selects, writes, or adopts the Welding Procedure Specification for each weld type on the project. Under D1.1, this means deciding whether a prequalified WPS (Clause 5) is applicable or whether procedure qualification testing (Clause 6 PQR) is required. Every WPS must be reviewed against the base metal, process, joint detail, and preheat requirements before production welding begins. See the prequalified WPS guide for D1.1 Clause 5 limits and the WPS overview for the full document structure.
2. Welder Qualification
Each welder must hold a current performance qualification (WPQ) covering the process, position, and base metal thickness they will weld in production. The coordinator maintains the qualification records, tracks the six-month continuity requirement under D1.1 Clause 6.24, and assigns welders only to weld joints covered by their qualifications. Expired or out-of-scope qualifications are the most common cause of NCRs during third-party audits.
3. Material Verification
Before a weld joint is fit up, the coordinator confirms that the base metal matches the specification called out in the WPS — typically by checking the mill test report (MTR) against the heat number stamped or painted on the steel. This closes the traceability loop: drawing calls a specification, the WPS names that specification, the MTR confirms the material meets it. A carbon equivalent calculation from the MTR chemistry also confirms whether the WPS preheat is sufficient for the actual heat of steel being welded.
4. NDE Planning and Hold Points
The coordinator determines the scope and type of non-destructive examination required by the contract documents and code. Under D1.1, NDE requirements depend on the structural category (statically loaded, cyclically loaded, tubular) and the joint configuration. The coordinator identifies hold points — weld stages that require inspection before the next operation proceeds — and communicates them to the inspector and the production team in advance. See the NDE requirements calculator for D1.1 Table 8.2 lookups.
5. Documentation and Records
The five documents that must be controlled on every D1.1 project: the WPS, the PQR (if applicable), welder WPQ records, MTRs, and NDE reports. On ISO 3834 projects, additional records include the weld map, inspection and test plan (ITP), and the manufacturing data record (MDR). The coordinator is accountable for these records being current, complete, and available for third-party review at any point during fabrication.
How D1.1 Distributes Coordinator Duties
AWS D1.1 does not define a "welding coordinator" role by name. Instead, the code assigns responsibilities to three parties: the Engineer (specifies requirements in contract documents), the Contractor (produces the welding, maintains WPSs and qualifications), and the Inspector (verifies conformance). In most fabrication shops, the welding engineer or CWI fills the Contractor role and interfaces directly with the Engineer's requirements and the Inspector's verification activities.
Key D1.1 Clauses for the Coordinator
| Clause | Topic | Coordinator Action |
|---|---|---|
| Clause 5 | Prequalification | Determine if prequalified WPS applies; verify all essential variables in scope |
| Clause 6 | Qualification | Qualify WPS via PQR when prequalification does not apply; maintain PQR records |
| Clause 6.24 | Welder continuity | Track six-month continuity requirement; re-qualify if continuity lapses |
| Clause 7.5 | Production welding | Ensure WPS is followed; verify preheat before welding begins |
| Clause 7.6 | Preheat & interpass | Confirm minimum preheat per Table 5.11 or Annex B; control maximum interpass per WPS |
| Clause 8 | Inspection | Identify NDE scope; establish hold points; provide records to Inspector |
Job Title Variants for the Same Role
The coordinator function is performed under many different titles depending on shop size, industry sector, and the standard being followed. All of the following titles refer to essentially the same set of responsibilities:
| Title | Typical Context |
|---|---|
| Responsible Welding Coordinator (RWC) | ISO 14731 / ISO 3834 formal designation |
| Welding Engineer | Mid to large fabrication shops; usually degree-qualified |
| Welding Coordinator | General industry title; no credential implied |
| Welding Supervisor | Small shops; often the working foreman with coordinator duties |
| Quality Manager (welding) | ISO 9001 environments where welding QA is part of a broader QMS role |
| Welding Engineer of Record | EPC and bridge projects; the Engineer of Record approves WPSs |
| Senior CWI | Small fabricators where the senior inspector also manages WPS documentation |
| Production Welding Coordinator | Aerospace and pressure vessel contexts; identical function under ASME IX |
In small fabrication shops — typically 10 to 50 people — the owner or the most experienced CWI on staff performs all coordinator functions without a formal title. This is common in structural, pipeline, and shipyard work. The duties are the same regardless of what name appears on the business card.
ISO 3834 and the RWC Role
ISO 3834 is a quality management standard for fusion welding — it specifies what a fabrication shop must have in place to demonstrate control over its welding processes. The standard has three quality levels: ISO 3834-2 (comprehensive), ISO 3834-3 (standard), and ISO 3834-4 (elementary). Each level requires a designated Responsible Welding Coordinator per ISO 14731.
The required technical knowledge level of the RWC increases with the ISO 3834 quality level. ISO 14731 maps this to IIW credential tiers: IWT (Welding Technologist) for ISO 3834-4, IWS (International Welding Specialist) for ISO 3834-3, and IWE (International Welding Engineer) for ISO 3834-2. AWS-credentialed professionals working under D1.1 typically map a CWI with welding engineering experience to the IWS level for most structural fabrication scopes.
AWS vs ISO: D1.1 shops not pursuing ISO 3834 certification do not need to designate an RWC formally. But the ISO 14731 duty list is a useful self-audit tool regardless of certification status — it covers every control point a well-run D1.1 shop should already have in place.
The Five Documents Every Coordinator Must Control
| Document | What It Proves | D1.1 Reference |
|---|---|---|
| WPS | The weld was made to an approved, written procedure | Clause 5 or 6 |
| PQR | The procedure was proven by testing (when required) | Clause 6.7 |
| WPQ | The welder is qualified for the work performed | Clause 6.20–6.28 |
| Mill Test Report (MTR) | The base metal meets the specified material standard | Clause 7.3 |
| NDE Reports | All required inspection was performed and accepted | Clause 8 |
Frequently Asked Questions
What is a welding coordinator?
A welding coordinator is the person or persons responsible for ensuring that welding is carried out in accordance with the applicable code and contract requirements. Under ISO 14731, the role is formally titled Responsible Welding Coordinator (RWC). Under AWS D1.1, the equivalent duties are distributed across the Engineer, the Contractor, and the Inspector — there is no single "coordinator" title in the code, but in practice the welding engineer or senior CWI at a fabrication shop performs all of these functions.
What documents must a welding coordinator control?
The five documents a welding coordinator must control are: (1) the Welding Procedure Specification (WPS) — the written instructions for each weld; (2) the Procedure Qualification Record (PQR) — the test data supporting any qualified WPS; (3) Welder Performance Qualification records (WPQ) — proof that each welder is qualified for the processes and positions they perform; (4) mill test reports (MTRs) — material certifications confirming base metal specification; and (5) NDE reports — documentation of all non-destructive examination results.
Do you need a certification to be a welding coordinator?
Under AWS D1.1 there is no mandatory certification title for the coordinator role — the code assigns duties to the Engineer and the Contractor without specifying credentials. For ISO 3834 certification, the shop must designate an RWC with sufficient technical knowledge per ISO 14731, which maps to IIW credential levels: IWT (Welding Technologist) for ISO 3834-4, IWS (Welding Specialist) for ISO 3834-3, and IWE (International Welding Engineer) for ISO 3834-2. AWS offers a Welding Coordinator endorsement as a supplement to the CWI credential.
What is the difference between a welding coordinator and a welding inspector?
A welding coordinator is responsible for planning and controlling the welding process — selecting procedures, qualifying welders, ensuring correct materials, and managing documentation. A welding inspector is responsible for verifying that welding was performed correctly — checking dimensions, visual acceptance, NDE results, and code compliance. The coordinator plans and enables; the inspector verifies and accepts. On small projects one person may fill both roles, but the functions are distinct.
What is an RWC under ISO 3834?
RWC stands for Responsible Welding Coordinator — the title defined in ISO 14731:2019 for the person who coordinates welding activities to meet ISO 3834 quality requirements. The RWC is responsible for the full welding quality loop: contract review, technical review of drawings and specifications, WPS and PQR management, welder qualification and assignment, material traceability, NDE planning, and documentation. ISO 3834 has three quality levels (3834-2 comprehensive, 3834-3 standard, 3834-4 elementary) and the required technical knowledge level of the RWC increases accordingly.