Welding Documentation & Record-Keeping: Weld Maps, Traveller Cards, JHA, and Complete Data Book Guide

Welding documentation is the formal paper and electronic trail that proves every weld on a fabricated structure or pressure equipment was made correctly — by a qualified welder, to an approved procedure, from traceable materials, and with verified inspection results. It is not administrative overhead: it is the mechanism by which codes like ASME Section IX, ISO 3834, and EN 1090 enforce fabrication quality. When documentation fails, welds fail audit — and failed audits halt production, trigger costly rework, and in the worst cases result in catastrophic in-service failures with legal and regulatory consequences. This guide covers every document type in the welding quality system: from the job hazard analysis (JHA) that opens a hot-work permit to the Manufacturer’s Data Record (MDR) that closes out a pressure vessel for lifetime service.

The Welding Documentation Hierarchy

Welding documents sit in a three-tier hierarchy that mirrors the quality management system itself. Understanding how the tiers relate to each other is the foundation for building a compliant documentation system.

WPS, PQR, and WPQ — Procedure and Personnel Qualification Records

The three foundational procedure and personnel documents — WPS, PQR, and WPQ — are the most legally significant welding documents produced by any fabricator. They are the first documents requested by any competent inspector and the first to be challenged during an audit. A fabrication shop that cannot produce current, valid WPS and WPQ documents for every production weld cannot legally demonstrate code compliance.

Welding Procedure Specification (WPS)

A WPS is the welding instruction document. It tells the welder — and more importantly the inspector — exactly what parameters must be used for a specific weld. Under ASME Section IX, a WPS must address all the essential variables, supplementary essential variables (when notch-toughness testing is required), and non-essential variables applicable to the welding process used. The WPS is supported by a PQR; it references the PQR number on its face.

Procedure Qualification Record (PQR)

The PQR is the test record. It documents what actually happened during the welding of the qualification test coupon — the actual measured parameters (not the range from the WPS) — and the mechanical test results that prove the weld metal meets the minimum code properties. A PQR is generated once per qualification test; many WPS documents can reference the same PQR provided no essential variables are changed beyond the limits tested.

Welder Performance Qualification (WPQ)

A WPQ (also called a WPQR — Welder/Welding Operator Performance Qualification Record) documents that a specific named individual has demonstrated the skill to produce sound welds. Under ASME Section IX, a welder’s qualification is bounded by the process, P-Number group, F-Number, thickness range, diameter range (for pipe welds), and position used in the qualification test. Qualification expires after 6 months unless the welder maintains continuity of welding — meaning they have welded with that process at least once within any 6-month period, documented in the welder continuity log.

The Weld Map — Design, Content, and Use

The weld map is the master cross-reference document for a fabricated assembly. Every pressure vessel, piping spool, structural frame, or pressure equipment item produced to a code quality standard must have a weld map. It is typically a dimensioned isometric drawing (for piping spools) or orthographic fabrication drawing (for vessels and structural items) on which each weld joint has been assigned a unique sequential number.

What a Weld Map Must Show

A properly constructed weld map contains, as a minimum, the following information for every weld joint marked on the drawing:

• Unique Weld Number: A non-repeating identifier (e.g., SP-023-W01, SP-023-W02) that is the primary key linking the weld map to all other records
• WPS Reference: The WPS number and revision governing that joint
• Welder/Operator ID: The identity stamp number or name of the welder(s) who welded that joint
• NDE Method Required: RT, UT, MT, PT, VT — as required by code and specification
• NDE Report Reference: The report number and result (accept/reject/repair)
• PWHT Status: Whether PWHT is required and the PWHT chart reference number
• Joint Type and Dimension: Joint category (A, B, C, D per ASME VIII), thickness, diameter
• Acceptance Status: Final accept or reject status after all inspections

Weld Map Revision Control

The weld map is a controlled document. Any revision — adding a weld, changing a WPS reference, updating an NDE result, recording a repair — must follow the document control procedure: a new revision number is issued, the change is described in the revision block, and the previous revision is superseded (not deleted). All revisions must be retained in the document archive because the revision history is itself a quality record demonstrating the as-built condition evolved in a controlled manner.

The Weld Traveller Card — Shop-Floor Traceability

While the weld map is typically managed in the engineering office or QC department, the weld traveller card (sometimes called a weld traveller, work traveller, route card, or fabrication card) lives on the shop floor. It physically accompanies the component or spool from the first operation (material receiving and marking) through every subsequent stage until the item is released for despatch. The traveller is the real-time record of what happened, when, and who authorised each step. No step in the fabrication sequence may begin until the preceding step has been signed off on the traveller.

Structure and Mandatory Fields

Job Hazard Analysis (JHA) for Welding Operations

A Job Hazard Analysis — also called a Job Safety Analysis (JSA), Safe Work Method Statement (SWMS), or Task Risk Assessment (TRA) — is the document that systematically breaks a welding task into discrete steps, identifies every hazard at each step, assesses the risk level (typically using a Likelihood × Consequence matrix), and specifies the controls that reduce that risk to an acceptable level before work begins. In most jurisdictions, completing and communicating the JHA to all performing personnel is a legal requirement under occupational health and safety regulations, not just an industry best practice.

When a JHA Is Required for Welding

A JHA is mandatory before commencing any of the following welding-related activities:

• Any hot work (welding, grinding, cutting, brazing) in an operating plant or within a hot-work controlled area
• Welding in confined spaces (vessels, tanks, pits, trenches with restricted egress)
• Overhead or elevated welding (fall risk to welder and personnel below)
• Welding on pressure-containing equipment in or near service (live plant modifications)
• Welding of exotic materials generating hazardous fumes (stainless steels: hexavalent chromium; galvanised steel: zinc oxide; lead-painted surfaces)
• Field welding at non-routine locations where standard workshop controls may not apply

JHA Structure and Required Content

JHA and the Hot-Work Permit System

The JHA is a prerequisite for obtaining a Hot-Work Permit (HWP) in any plant or construction environment. The HWP is a separate, time-limited permit (typically valid for a shift — 8 to 12 hours) that authorises the specific hot-work activity at the specific location on the specific date. The permit requires sign-off from the area authority (area operations supervisor or permit issuer), the fire watch attendant, and the performing supervisor. It is not sufficient for the welding JHA to be complete — the HWP must also be issued, displayed at the work site, and closed out at the end of the shift with the fire watch confirming the area is clear. The JHA remains valid for the duration of the task (or until conditions change), while HWPs are renewed each shift.

NDT Documentation — Reports, Films, and Data Storage

Non-destructive testing generates its own complete set of documents that must be controlled and retained with the weld data book. The requirements for NDE documentation are specified in the applicable code (ASME VIII, ASME V, EN 13068, EN 1435) and the employer’s written practice for NDE (required by ASME Section V and SNT-TC-1A).

Mandatory Content of an NDE Report

PWHT Documentation — Time-Temperature Records

Post Weld Heat Treatment generates one of the most legally significant documents in the fabrication record: the PWHT time-temperature chart. This is a continuous recording from calibrated thermocouples that provides incontrovertible evidence that the soak temperature, hold time, heating rate, and cooling rate specified in the code and PWHT procedure were achieved. Without an acceptable PWHT chart, the treatment cannot be considered complete and the vessel cannot be accepted.

Mandatory Elements of a PWHT Record

Material Traceability Documentation

Material traceability is the ability to link every piece of pressure-containing material in the finished product back to the original mill certificate (Material Test Report, MTR) for that heat. This is not optional: ASME Section VIII UG-93 mandates material identification and certification for all pressure parts, and the requirement for traceability extends through every cutting, forming, and welding operation to ensure no uncertified material enters the pressure boundary.

The Material Traceability Chain

The Final Data Book / Manufacturer’s Data Record (MDR)

The data book — called a Manufacturer’s Data Record (MDR), Quality Record Package (QRP), or Final Documentation Package depending on the contract — is the assembled, bound collection of all quality records for a specific item of equipment. It is submitted to the owner on completion of fabrication and is retained for the design life of the equipment. For pressure vessels, it also contains the code data report (ASME Form U-1A or equivalent) that forms the legal basis for the equipment’s registration and operation.

Standard Data Book Section Index

Document Retention Requirements

Common Documentation Non-Conformances and How to Prevent Them

The following table summarises the most frequently cited welding documentation non-conformances found during ASME, ISO 3834, and owner audits — and the corrective actions that prevent recurrence.

Recommended Reference Books on Welding Quality & Documentation

Frequently Asked Questions

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