NR-13 Compliance for Inspection Service Providers
Every Brazilian employer operating boilers above 60 kPa operating pressure, pressure vessels whose P·V product exceeds 8 or which contain class A fluids, interconnecting piping carrying class A or B fluids, and metallic storage tanks over 3 m external diameter and 20,000 litres nominal capacity. Personnel certification is central or third-party here, so the firm cannot certify its own technicians internally.
Inspection service providers are bound indirectly but absolutely: the employer must be able to prove that every inspection, test and NDT report it buys satisfies NR-13. 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.
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.
| Item | What applies | Why it matters |
|---|---|---|
| Authority | Ministério do Trabalho e Emprego (MTE), which publishes the Normas Regulamentadoras; enforced on site by Auditores-Fiscais do Trabalho | The body that issues, audits and can withdraw |
| Applies to | Every Brazilian employer operating boilers above 60 kPa operating pressure, pressure vessels whose P·V product exceeds 8 or which contain class A. | Whether this binds your firm at all |
| Personnel certification | Central or third-party certification required | Decides whether an outsourced Level III can sign for you |
| 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. | Diarise from the certificate date, not from memory |
| Methods in scope | VT, UT, UT thickness measurement, PAUT, TOFD, MT | Each method needs its own procedure and qualified personnel |
| Industries | Refining, Petrochemical, Chemical, Pulp and paper (alkali recovery boilers are named explicitly), Sugar and ethanol | Where this regime shows up in contracts |
Who does NR-13 apply to?
Every Brazilian employer operating boilers above 60 kPa operating pressure, pressure vessels whose P·V product exceeds 8 or which contain class A fluids, interconnecting piping carrying class A or B fluids, and metallic storage tanks over 3 m external diameter and 20,000 litres nominal capacity. Inspection service providers are bound indirectly but absolutely: the employer must be able to prove that every inspection, test and NDT report it buys satisfies NR-13.
Can an outsourced Level III sign for NR-13 compliance?
Not for the certification itself. NR-13 requires central or third-party personnel certification, so technicians are certified by the scheme rather than by the employer. A consulting Level III still adds value on procedures, documentation, gap assessment and audit attendance — but cannot substitute for the scheme's own certification.
What documents does a NR-13 audit ask for?
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. Auditors open records before they open manuals, because a manual describes intent while records show practice. The most common failure is a documented system that does not match what the technicians actually do.
How often is NR-13 renewed?
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. Firms that diarise renewal from the certificate date rather than from the last audit avoid the lapse that forces a full reapplication.
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. These recur because they are records problems rather than capability problems — the work is being done correctly and the evidence is not being kept.
Which NDT methods does NR-13 cover?
VT, UT, UT thickness measurement, PAUT, TOFD, MT, PT, RT. Each method in scope needs its own approved procedure and personnel qualified in that specific method; a Level III qualified in ultrasonics cannot sign for radiography.
Personnel certification under NR-13
Two separate requirements, and confusing them is the classic and expensive mistake. The PLH is not an NDT Level III: item 13.3.2 defines it as a person legally competent to practise engineering in Brazil under the prevailing professional regulation, so an ASNT Level III without Brazilian engineering registration cannot sign an NR-13 inspection report. Certification of the PLH's competences is voluntary, through an Organismo de Certificação de Pessoas accredited by Cgcre/Inmetro, with recertification every sixty months (Annex III). For NDT technicians, Annex II requires contracted NDT labour to be certified under prevailing regulation, and Inmetro's SPIE requirements make that ABNT NBR NM ISO 9712 — central third-party certification, not an employer written practice.
The audit sequence
- Classification — the employer confirms scope under item 13.2.1 and categorises each boiler as A (operating pressure at or above 1,960 kPa) or B (above 60 kPa and below 1,960 kPa) and each pressure vessel into categories I to V.
- Initial safety inspection before the equipment enters service at its definitive installation location, comprising internal examination, external examination and a pressure test, under PLH technical responsibility; fabrication-stage hydrostatic testing evidenced by a report signed by a PLH.
- Inspection programme and plan drawn up and approved by the PLH, defining the examinations and tests per applicable codes and the equipment's history.
- Periodic safety inspections at the maximum intervals of item 13.4.4.4 (boilers) and Table 2 (pressure vessels), with outcomes and operational condition entered in the Registro de Segurança and signed by the PLH and, for boilers, the operator present.
- Extraordinary inspection after accidental damage, significant repair or alteration, relocation, or extended idleness (over 12 months for vessels, over 24 months for tanks).
- Enforcement — Auditores-Fiscais do Trabalho examine the documentation on site. NR-13 issues no certificate of any kind; the only certificate route is the voluntary SPIE scheme of Annex II, certified by an Inmetro-accredited OCP.
Documents an auditor asks for
- 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 firms get against NR-13
- 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.