Equipment Calibration Records for IACS UR Z17
IACS UR Z17 names this requirement as "Description of the equipment used for the service, plus a guide for operators of that equipment". The equipment custodian owns it, and a contracted Level III can author and sign it.
The finding auditors record against this document is: Equipment records missing maintenance history or the results of calibration and verification (5.2.5). UR Z17 sets the minimum requirements every IACS member society applies before it will accept a service supplier's results. The firm — not the individual technician — is approved. It must submit a company outline, personnel and equipment records, work procedures, training programmes, report formats and a quality manual; pass a document review; pass an on-site audit; and pass a practical demonstration of the actual service. Approval is granted per service category and per station: where a company owns several servicing stations, each is assessed and approved separately. Subcontractors performing the approved service must themselves meet Section 5. Every report issued must include a copy of the Certificate of Approval.
Source: IACS UR Z17 Rev.21, January 2025 — full 41-page text (Sections 1–9 plus Annex 1) read clause by clause from the ClassNK-hosted copy of the IACS requirement. The revision history in that text records Rev.19 and Rev.20 for uniform implementation by IACS Societies from 1 January 2026 and Rev.21 from 1 July 2026. Verified August 2026.
| Item | What applies | Why it matters |
|---|---|---|
| Regime | IACS Unified Requirement Z17 — Procedural Requirements for Service Suppliers | Enforced by International Association of Classification Societies (IACS); applied and enforced by each IACS Member class society |
| Document | Equipment Calibration Records | the traceable evidence that every instrument was in calibration on the day it was used |
| Owner | the equipment custodian | The signature an auditor traces back |
| Where it is checked | Issue of a Certificate of Approval under 6. | Usually against a sampled job, not in isolation |
| Common failure | Operator or supervisor certificates on file do not cover the method or level the relevant Annex 1 category requires | The gap between the manual and the job file |
What must a equipment calibration records contain under IACS UR Z17?
It has to satisfy IACS UR Z17 as International Association of Classification Societies (IACS); applied and enforced by each IACS Member class society enforces it: the traceable evidence that every instrument was in calibration on the day it was used. The test is not completeness on paper but traceability — an auditor picks a finished job and works backwards to this document, so anything it claims must be demonstrable on that job.
Who signs the equipment calibration records for IACS UR Z17?
The equipment custodian. Because this regime accepts employer-based certification, that role can be filled by a contracted Level III rather than a staff appointment, provided they are qualified in the methods they sign for.
How does a IACS UR Z17 auditor test this document?
By sampling. They take a completed job, find the technicians and equipment used, and trace each back through this document to the evidence behind it. A document that reads well but cannot survive that trace is the most common finding across every regime, not just this one.
How long must IACS UR Z17 records be kept?
Renewal or endorsement of the Certificate of Approval at intervals not exceeding five years by verification audit (6.2), or on expiry of the supplier's manufacturer approval where that applies, whichever comes first. For firms engaged in thickness measurements the interval must not exceed three years. Individual societies may impose shorter intervals and intermediate audits; failure to undergo a required intermediate audit is listed as grounds for cancellation under 8.2.4. Retention is set by the regime and by the client contract above it, and the longer of the two governs. Firms that set one retention period for everything and document it fare better at audit than firms tracking different periods per record type and losing track.
Does a generic template satisfy IACS UR Z17?
No. A downloaded template describes a generic firm, and the first question an auditor asks is whether the document describes THIS firm — its methods, its equipment, its people, its actual workflow. Templates are a starting structure; the content has to be the firm's own or the trace fails immediately.
What happens if this document is missing at a IACS UR Z17 audit?
It is a finding, and depending on the regime it can suspend the certificate rather than merely generate a corrective action. The related finding auditors record most often is: Operator or supervisor certificates on file do not cover the method or level the relevant Annex 1 category requires
Where this sits in the IACS UR Z17 evidence pack
- Outline of company — organisation and management structure, including subsidiaries to be covered by the approval
- List of nominated agents, subsidiaries and subcontractors
- List of operators/technicians/inspectors documenting training, experience and qualifications to recognised national, international or industry standards
- Description of the equipment used for the service, plus a guide for operators of that equipment
- Training programmes for operators/technicians/inspectors
- Check lists and record formats for recording the results of the services referred to in Annex 1
- Quality Manual and/or documented procedures covering the items listed in 5.5
- Documented procedures for communication with the crew before commencing work, so equipment can be safely decommissioned
- Record of customer claims and of corrective actions requested by certification bodies
- Operators' documented acknowledgement of the code of conduct
Personnel certification context
Employer-based, with a third-party overlay. Under 5.2.2 the supplier itself qualifies and trains its personnel to a recognised national, international or industry standard; operators need at least one year of tutored on-the-job training and supervisors at least two years' experience as an operator. For thickness measurement, Annex 1 gives EN 473 or ISO 9712 Level II for the supervisor and Level I for operators as examples of an acceptable standard. Annex 1 Section 15 names ASNT SNT-TC-1A explicitly alongside ISO 9712, but requires SNT-TC-1A holders to evidence that training was administered by an independent training body centrally certified to ASNT. An outsourced Level III can author and approve procedures and act as technical authority, but cannot replace the operator and supervisor certificates the audit inspects.
Related: the IACS UR Z17 overview, outsourced ASNT Level III cover, written practice development, NDT procedure development, a programme gap assessment, interim Level III cover.