NR-13 Audit Preparation for Inspection Companies
A NR-13 audit runs in 6 stages, beginning with classification — the employer confirms scope under item 13.2.. Ministério do Trabalho e Emprego (MTE), which publishes the Normas Regulamentadoras; enforced on site by Auditores-Fiscais do Trabalho tests the system by sampling finished work backwards to the records behind it, so preparation means reconciling records to jobs rather than rewriting manuals.
NR-13 places the legal duty on the employer, not the contractor, and that shapes how inspection service providers sell into Brazil. Every safety inspection must be executed under the technical responsibility of a Profissional Legalmente Habilitado (PLH) — item 13.3.3. Selection of examinations and tests, hydrostatic and pneumatic test procedures, interval extensions and the consolidated report all rest on that PLH's technical judgement, and the report must carry the PLH's legible name, signature and professional-council registration number. A provider supplying only NDT technicians cannot sign; it must employ a Brazil-registered engineer or work under the client's PLH. Metallic storage tanks entered scope on 4 July 2026, opening a substantial new inspection market. What separates firms that clear an audit from firms that collect findings is not the quality of the documentation but whether it describes what actually happens.
Source: NR-13 consolidated text published by the Ministério do Trabalho e Emprego on gov.br (file nr-13-atualizada-2023-b.pdf), extracted and read directly. Current wording given by Portaria nº 1.846 of 1 July 2022 (DOU 4 July 2022) — cited within the norm's own publication table as Portaria MTP nº 1.846 and in the body text as Portaria MTb nº 1.846 — amended by Portaria MTP nº 4.219 of 20 December 2022 (DOU 22 December 2022), with rectifications dated 20 October 2022. Parent instrument Portaria MTb nº 3.214 of 8 June 1978 (DOU 6 July 1978). Storage-tank scope commencement of 4 July 2026 from the note to item 13.2.1 f citing art. 3 of Portaria MTP nº 1.846/22; piping scope commencement of 20 March 2018 from the note to item 13.6.2.1 citing art. 6. Verified 21 August 2026.
| Stage | What happens | What it tests |
|---|---|---|
| Stage 1 | Classification — the employer confirms scope under item 13.2. | Where the paperwork is tested against itself |
| Stage 2 | Initial safety inspection before the equipment enters service at its definitive installation location, comprising internal examination, external examination and a. | Where the paperwork is tested against practice |
| Stage 3 | Inspection programme and plan drawn up and approved by the PLH, defining the examinations and tests per applicable codes and. | Where the paperwork is tested against practice |
| Stage 4 | Periodic safety inspections at the maximum intervals of item 13.4.4. | Where the paperwork is tested against practice |
| Stage 5 | Extraordinary inspection after accidental damage, significant repair or alteration, relocation, or extended idleness (over 12 months for vessels, over 24. | Where the paperwork is tested against practice |
| Stage 6 | Enforcement — Auditores-Fiscais do Trabalho examine the documentation on site. | Where the paperwork is tested against practice |
| Renewal | Boilers, periodic internal and external examination (item 13.4.4.4): maximum 12 months for categories A and B; 18 months for alkali recovery boilers of any category; 24 months for category A provided safety valve opening pressures are tested at 12 months; 30 months for category B with a combustion management system meeting Annex IV. Establishments holding a certified SPIE may extend to 24 months (alkali recovery and category B), 30 months (category A) and 48 months (category A with a Safety Instrumented System meeting Annex IV). Pressure vessels follow Table 2 by category I to V — external examination at 1, 2, 3, 4 and 5 years and internal at 3, 4, 6, 8 and 10 years; with a certified SPIE, external at 3, 4, 5, 6 and 7 years and internal at 6, 8, 10 and 12 years, with category V internal at technical criterion. A certified SPIE using a documented risk-based methodology may extend further, capped at 10 years for internal examination of category I vessels. Piping follows the internal interval of the most critical connected vessel or boiler and may be doubled on the PLH's technical justification, capped at 10 years. Boilers reaching 25 years of use undergo a broader integrity assessment at the following inspection. Postponement of up to six months is possible with a risk assessment coordinated by a PLH, and must be formally justified to the predominant workers' union. | Diarised from the certificate date, not the last audit |
How long does NR-13 audit preparation take?
Document work — the written practice, procedures and quality manual — takes weeks. What cannot be compressed is documented experience and records history: on-the-job hours accrue in real time, and calibration and certification history cannot be back-filled. Firms that start when the audit is scheduled rather than announced clear it without findings.
What does Ministério do Trabalho e Emprego (MTE), which publishes the Normas Regulamentadoras; enforced on site by Auditores-Fiscais do Trabalho look at first?
Records, not manuals. A manual states intent; records show practice. The usual opening move is to take a completed job and trace it back to the technician's certification, the instrument's calibration, the approved procedure and the report — and see whether all four reconcile.
What are the most common NR-13 findings?
Consolidated inspection report signed by an NDT Level III or a senior technician rather than by a PLH — the report content lists require the PLH's legible name, signature and professional-council registration number, Prontuário incomplete or missing the PMTA calculation memory; item 13.4.1.6 requires reconstitution under the technical responsibility of the manufacturer or a PLH, and functional characteristics, safety-device data and the PMTA calculation are non-negotiable, Registro de Segurança that does not record the equipment's operational condition, or lacks the boiler operator's signature alongside the PLH's at the time of inspection (item 13.4.1.8 b), Contracted NDT technicians holding employer-issued or foreign certificates with no SNQC certificate for the method and industrial sector. Almost all of them are evidence problems rather than capability problems: the work was done correctly and the proof was not kept, or was kept somewhere the firm could not retrieve during the audit.
Can a consultant attend the NR-13 audit?
Yes, and it changes the outcome. Someone who has sat through the same audit at other firms answers in the auditor's own terms, produces the right record without a search, and stops a clarification turning into a finding. The firm still owns every answer — the consultant does not speak for it.
What happens after a NR-13 finding?
A corrective action with a deadline, and evidence of closure at the next audit. Repeat findings are treated far more seriously than first ones, because they show the corrective-action system itself is not working.
Does NR-13 require a pre-audit or gap assessment?
Not as a requirement, but the arithmetic favours it: a gap assessment finds the same evidence problems the auditor would, without the finding attached, and while there is still time to fix them. Firms entering their first NR-13 audit blind typically collect findings that a sampling exercise would have caught.
What the auditor asks to see
- Prontuário da caldeira / prontuário do vaso de pressão — manufacturer's data book, including construction code and edition, material specification, PMTA methodology, fabrication hydrostatic test records, safety-device data and category (items 13.4.1.5 a and 13.5.1.5 a)
- Registro de Segurança — a numbered-page book, folder set or computerised system recording all occurrences affecting safety, interval changes, and initial, periodic and extraordinary inspections with the equipment's operational condition
- Projeto de Instalação — boiler installation design, authored under the responsibility of a PLH (item 13.4.2.1)
- Projeto de Alteração ou Reparo
- Relatórios de Inspeção de Segurança — initial, periodic and extraordinary, with the prescribed minimum content
- Certificados de inspeção e teste dos dispositivos de segurança
- Manual de operação, kept current and in Portuguese, for every boiler (item 13.4.3.1)
- Folhas de dados dos tanques — storage tank data sheets needed to plan and execute inspection (item 13.7.1.2 a)
- Plano e programa de inspeção approved by the PLH, including any documented risk-based inspection methodology integrated into the PGR under NR-01
Findings to close before the audit
- Consolidated inspection report signed by an NDT Level III or a senior technician rather than by a PLH — the report content lists require the PLH's legible name, signature and professional-council registration number
- Prontuário incomplete or missing the PMTA calculation memory; item 13.4.1.6 requires reconstitution under the technical responsibility of the manufacturer or a PLH, and functional characteristics, safety-device data and the PMTA calculation are non-negotiable
- Registro de Segurança that does not record the equipment's operational condition, or lacks the boiler operator's signature alongside the PLH's at the time of inspection (item 13.4.1.8 b)
- Contracted NDT technicians holding employer-issued or foreign certificates with no SNQC certificate for the method and industrial sector
- Interval extension claimed under SPIE rules by an establishment that holds no SPIE certificate, or a risk-based extension applied without the documented methodology integrated into the PGR under NR-01 (item 13.5.4.5.2)
- Inspection postponed without the formal justification communicated to the predominant workers' union required by item 13.3.1.1.1
- Metallic storage tanks, in scope since 4 July 2026, with no data sheets, no inspection programme and no Registro de Segurança
- Safety valve opening-pressure tests overdue against the 12-month cycle relied on to justify a 24-month interval for a category A boiler
Related: the NR-13 overview, outsourced ASNT Level III cover, written practice development, NDT procedure development, a programme gap assessment, interim Level III cover.