NR-13 BOILERS, PRESSURE VESSELS AND PIPING

Publication D.O.U.

Order GM No. 3,124 of June 08, 1978 07/06/78

Amendments / Updates

Order SSMT No. 12 of June 06, 1983

D.O.U. 06/14/83

Order SSMT No. 02 of May 08, 1984 06/07/84 Order SSST No. 23 of December 27, 1994 Rep.: 04/26/95

Order SIT No. 57 of June 19, 2008 06/24/08 Order MTE No. 594 of April 28, 2014 04/30/14

(List provided in Order MTE No. 594 of April 28, 2014)

SUMMARY

13.1.

Introduction

13.2. Coverage

13.3. General Provisions 13.4. Boilers

13.5. Pressure Vessels

13.6. Piping

13.6. Glossary Annex I – Training of Personnel.

Annex II – Requirements for Certification of In-house Equipment Inspection Service.

13.1

Introduction

13.1.1 This Regulatory Standard - NR establishes minimum requirements for managing the structural integrity of

steam boilers, pressure vessels and the piping interconnecting them in aspects related to installation, inspection,

operation and maintenance, aimed at workers’ health and safety.

13.1.2 The employer is responsible for adopting the measures stipulated in this NR.

13.2 Coverage

13.2.1 This NR must be applied to the following equipment:

a) all the equipment classified as boilers under item 13.4.1.1;

b) pressure vessels whose PV [pressão de volume: volume pressure] product is higher than 8 (eight), where P is the maximum

operating pressure in kPa and V its internal volume in m3;

c) pressure vessels containing a class A fluid specified in

item 13.5.1.2, line “a),” regardless of the dimensions and the P.V. [pressão de volume: volume pressure] product;

d) movable containers with a P.V. greater than 8 (eight) or class A fluid specified in item 13.5.1.2, line "a)";

e) piping or piping systems interconnected to boilers or pressure vessels, containing class A

or B fluids as per item 13.5.1.2, line “a)” of this NR.

13.2.2 Equipment listed below must undergo the inspections prescribed in pertinent national or international codes or

standards, being excused from fulfilment of other requirements of this NR;

a) transportable containers. pressure vessels intended for the transportation of products, portable compressed fluid

reservoirs and fire extinguishers;

b) pressure vessels intended to be occupied by humans;

c) pressure vessels that are an integral part of the rotary or reciprocating fluid machinery package;

d) pipelines;

e) furnaces and coils for heat exchange;

f) tanks and containers for the storing and stocking fluids not classified in design standards and codes related to pressure vessels;

g) pressure vessels with inside diameter less than 150 mm (one hundred and fifty millimeters) for Class B, C and D

fluids, as specified in item 13.5.1.2, line “a)”;

h) heat exchangers with gasketed corrugated plates;

i) steam generators not included in the pressure vessel codes;

j) pipes of instrumentation with nominal diameter ≤ 12.7 mm (twelve point seven millimeters);

k) piping of public networks for water and gas treatment and distribution and for sewage collection.

13.3 General Provisions

13.3.1 Noncompliance with any item provided in this NR that can cause a work related accident or illness, with severe

injury to the life and limb of the worker shall constitute a serious and imminent risk [RGI risco grave e iminente] - RGI,

particularly

a) operation of equipment covered by this NR, without safety devices adjusted to an opening pressure equal to or less

than the maximum permissible working pressure - MAWP, installed directly in the vessel or in the system

including it, considering the requirements of the design code relative to the selected openings and calibration

tolerances,

b) delay in the periodic boiler safety inspection;

c) inadvertent blocking of boiler and pressure vessel safety devices, or their intentional blockage without proper technical

justification based on codes, standards or formal equipment operating procedures;

d) lack of operational boiler water level control device;

e) operation of equipment covered in this NR with a deterioration certified by a recommendation for its withdrawal from operation consisting of a conclusive opinion in a safety inspection report, according to its respective design code or

adaptation for use;

f) operation of boiler by a worker not meeting the requirements established in Attachment I of this NR, or who is not under

supervision, monitoring or specific assistance of a qualified operator.

13.3.1.1 Due to reason of force majeure and with an employer’s formal justification, accompanied by a technical analysis

and respective contingency measures for mitigating the risks prepared by a Qualified Specialist [Profissional Habilitado] –

PH or by a multidisciplinary group coordinated by him, the term provided for the periodic boiler safety inspection can be

extended up to 6 (six) months.

13.3.1.1.1 The employer must communicate the formal justification for deferment of the periodic boiler safety inspection

to the labor union of the predominant professional category in the establishment

13.3.2 For purposes of this NR, Qualified Specialist – PH is deemed a person who is legally competent to exercise the profession

of engineer in activities relating to construction design, monitoring, operation and maintenance, inspection and supervision of

inspection of boilers, pressure vessels and piping, pursuant to current legal regulations in the Country.

13.3.3 All the repairs or modifications to equipment covered by this NR must observe the respective design and post-construction codes, and

the manufacturer’s instructions with regard to:

a) materials;

b) execution procedures;

c) quality control procedures;

d) personnel qualification and certification.

13.3.4 When the design code is not known, the original concept of the pressure vessel, boiler or piping must be respected,

using the control procedures prescribed under the relevant codes.

13.3.5 At a PH’s discretion, more advanced calculation technology or procedures may be used, replacing those provided by the design codes.

13.3.6 Change or repair designs [projetos de alteração ou reparo] - PAR must be devised in advance in the

following situations:

a) whenever the project conditions are modified;

b) whenever repairs are made that may compromise safety.

13.3.7 The PAR must:

a) be devised or approved by a PH;

b) determine materials, execution procedures, quality control and personnel qualification;

c) be disseminated to the employees of the establishment who are involved with the equipment.

13.3.8 All tasks that require boring or welding on parts operating under pressure must be examined or tested for quality control with

parameters defined by the PH, in accordance with applicable standards or codes.

13.3.9 Control and safety systems of boilers and pressure vessels must undergo preventive or predictive maintenance.

13.3.10 The employer must ensure that the examinations and tests on boilers, pressure vessels and piping are executed in

safe conditions for those performing them and other workers involved.

13.3.11 Employer must the communicate to the regional agency of the Ministry of Labor and Employment and to the

union of the predominant professional category in the establishment the occurrence of a leak, fire or explosion involving

equipment covered in this NR that has as a result one of the following situations below:

a) death of worker(s);

b) accidents involving a need to admit a worker(s) to a hospital;

c) large scale events.

13.3.11.1 The communication must be sent by the second business day following the occurrence and

must contain:

a) the employer’s company name, address, place, date and time of occurrence;

b) description of the occurrence;

c) name and job title of the victim(s);

d) investigation procedures adopted;

e) copy of the last safety inspection report of the equipment involved;

f) copy of the notification of the work accident [comunicação de acidente de trabalho] (CAT).

13.3.11.2 Upon the occurrence of the accidents stipulated in 13.3.11, the employer must notify the representative(s) of the

predominant workers’ union of the establishment to form an investigation commission.

13.3.11.3 Workers, based on their skills and experience, must stop doing their tasks, exercising the right of refusal,

whenever there is evidence of serious and imminent risks for their safety and health or that of other persons, immediately

reporting this fact to their ranking superior.

13.3.11.3.1 The employer is obligated:

a) to ensure for the workers the right to suspend their activities, exercising the right of refusal in the situations

provided in item 13.3.11.3, and in accordance with item 9.6.3 of Regulatory Standard 9;

b) immediately take the necessary measures to control the risks.

13.3.11.4 When required by the appropriate authority of the regional agency of the Ministry of Labor and Employment, employer shall submit the documentation mentioned in items 13.4.1.6, 13.5.1.6 and 13.6.1.4.

13.4 Boilers

13.4.1 Steam Boilers – General Provisions

13.4.1.1 Steam boilers are equipment for producing and accumulating steam under higher than atmospheric pressure,

using any source of energy, designed under the relevant codes, except reboilers or the like.

13.4.1.2 For the purposes of this NR, boilers are classified into 3 (three) categories as follows:

a) Category A boilers are those whose pressure is equal to or higher than 1960 kPa (19.98 kgf/cm2);

b) Category C boilers are those whose pressure is equal to or lower than 588 kPa (5,99 kgf/cm2) and whose internal volume is equal to or less than 100 l (one hundred liters);

c) Category B boilers are all the boilers that are not classified in the previous categories

13.4.1.3 The boilers must be equipped with the following

items:

a) safety valve with opening pressure set to a value equal to or lower than the MAWP, considering the requirements of

the design code relative to stepped openings and calibration tolerances;

b) instrument that indicates the accumulated steam pressure;

c) injector or water supply system independent of the main one preventing overheating above the design temperatures due to

deficient supply, , for non-spray solid fuel boilers or boilers with suspended burning;

d) dedicated quick water drainage system in alkali recovery boilers , with automatic operation after activation by the

operator;

e) automatic water level control system with interlock preventing overheating due to deficient supply.

13.4.1.4 Every boiler must have affixed onto its body, in an easily accessible and highly visible place, an indelible nameplate with, at least,

the following information:

a) manufacturer’s name;

b) order number given by the boiler manufacturer;

c) year of manufacture;

d) maximum permissible working pressure;

e) manufacturing hydrostatic test pressure;

f) steam production capacity;

g) heating surface area; design code and year of issue.

13.4.1.6 Apart from the nameplate, it must contain at a visible level, the category of the boiler, as stipulated in item

13.4.1.2 of this NR, and its identification or code number.

13.4.1.6 Every boiler must have, in the establishment where it is installed, the following documentation, duly updated:

a) Boiler records, provided by its manufacturer containing the following information:

- design code and year of issue;

- specification of materials; - procedures used in the manufacture, assembly and final inspection;

- methodology for the establishing the MAWP;

- records of the performed manufacturing hydrostatic test.

- set of drawings and other data necessary for monitoring the service life of the boiler; - functional characteristics;

- data on safety devices;

- year built;

- boiler category;

b) Safety Log, in conformity with item 13.4.1.9;

c) Installation Design in conformity with item 13.4.2.1;

d) PAR in conformity with the items 13.3.6 and 13.3.7;

e) Inspection reports, in conformity with item 13.4.4.14;

f) Calibration certificates of the safety devices.

13.4.1.7 If there is no boiler record or if lost, it must be recreated by employer, under the manufacturer’s or PH’s technical

responsibility; being mandatory to recreate the functional characteristics, data on safety devices and MAWP calculation

sheet.

13.4.1.8 When the boiler is sold or transferred from the establishment, the documents mentioned in letters “a,” “d,” and

“e” of item 13.4.1.6 must accompany it.

13.4.1.9 The Safety Log must consist of a book with numbered pages, folders or a computerized system with equivalent

reliability, where the following will be recorded:

a) all important events capable of affecting the boiler safety conditions;

b) the initial, periodic and special safety inspection events, and must record the boiler operating condition, the legible name and

the signature of the PH and of the boiler operator present at the time of the inspection.

13.4.1.10 If the boiler is deemed inadequate for use, the Safety Log must contain such information and be formally closed.

13.4.1.11 The documentation referred to in item 13.4.1.6 must always be available for consultation of operators,

maintenance and inspection personnel and representatives of workers and employer in the Internal Commission for

Accident Prevention – CIPA, and the employer must ensure full access to this documentation.

13.4.2 Steam boiler installation

13.4.2.1 The responsibility for the steam boiler installation, as it concerns compliance with this NR, belongs to the PH

and must conform to the safety, health and environment aspects prescribed in the Regulatory Standards, conventions and applicable legal provisions.

13.4.2.2 Boilers of any establishment must be installed in a boiler room or in a specific place for such purpose, designated

the boiler area.

13.4.2.3 When the boiler is installed in an open space, the boiler area must meet the following requirements:

a) it must be, at least 3.0 m (three meters) away

- from other facilities of the establishment;

- from fuel storage tanks, with the exception of startup reservoirs with up to 2,000 L (two thousand liters) capacity;

- the property limit of third parties;

- the boundary with public roads;

b) have at least 2 (two) wide, permanently unobstructed outlets marked with signs and laid out in different directions;

c) have easy and safe access, necessary for the operation and maintenance of the boiler, wherein, for open railings, the gaps

must be sized to prevent people from falling;

d) have a system for capturing and jettisoning of gases and particulate matter from combustion to the outside of the

operating area in compliance with current environmental standards;

e) have lighting as per current official standards;

f) have an emergency lighting system, if operating at night.

13.4.2.4 If the boiler is installed in a closed space, the boiler room must meet the following requirements:

a) constitute a separate building, constructed of fire-resistant material, and it may have only one wall adjacent to other

facilities of the establishment, however with the other walls at least 3.00 m (three meters) away from other

facilities, the third party property boundary, boundary with public roads and fuel storage tanks, except reservoirs

for startup with up to 2000 L (two thousand liters) capacity; b) have at least 2 (two) wide outlets, permanently unobstructed, marked with signs and laid out in different

directions;

c) have permanent ventilation with air inlets that cannot be blocked;

d) have a sensor for detecting gas leakage if it involves a gas fuel boiler;

e) not be used for any other purpose;

f) have easy and safe access, necessary for boiler operation and maintenance, wherein, for open railings, the gaps must be sized

to prevent people from falling;

g) it is to have a system for capturing and jettisoning of gases and particulate matter from combustion to the outside of

the operation area in compliance with current environmental standards;

h) have lighting as per current official standards and have an emergency lighting system.

13.4.2.5 When the establishment cannot meet the provisions in items 13.4.2.3 and 13.4.2.4, an alternate installation design must be prepared with additional safety measures that permit the mitigation of the risks, notifying in advance the

representatives of the predominant labor union in the establishment.

13.4.2.6 Boilers classified in Category A must have an instrument panel installed in the control room, built as set forth in

applicable Regulatory Standards.

13.4.3 Safety in boiler operation

13.4.3.1 Every boiler must have an updated operation manual in Portuguese, in a place easily accessible to the operators, containing at least:

a) start and stop procedures;

b) routine operating procedures and parameters;

c) procedures for emergency situations;

d) general health, safety and environmental preservation procedures.

13.4.3.2 Boiler instruments and controls must be kept calibrated and in good operating condition.

13.4.3.2.1 Instruments and controls can be temporarily neutralized, provided that operating safety is not reduced, and it is

prescribed in the formal operating and maintenance procedures or with formally supported with documents, with prior

technical analysis and the respective contingency measures for mitigating the risks prepared by the technical supervisor of

the process with the consent of the PH.

13.4.3.3 Water quality must be monitored and treated, when necessary, in order to harmonize its physical-chemical

properties with the boiler operating parameters; these treatments are compulsory in boilers classified as Category A, in

accordance with 13.4.1.2 of this NR.

13.4.3.4 Every steam boiler must compulsorily be under the boiler operator’s operation and control.

13.4.3.5 The boiler operator shall be considered someone who meets the provision in item A of Attachment I of

this NR.

13.4.4 Boiler safety inspection.

13.4.4.1 The boilers must undergo initial, periodic and special safety inspections.

13.4.4.2 An initial safety inspection must be performed on new boilers before they go into operation at the operating site, which must include an internal examination, followed by a tightness test and external examination.

13.4.4.3 The boilers must compulsorily undergo a Hydrostatic Test [Teste Hidrostático] – TH in their manufacturing phase

with a verification certificate signed by a PH, and have their test pressure value affixed on the nameplate.

13.4.4.3.1 In the absence of documentary corroboration that the Hydrostatic Test – TH has been performed in the

manufacturing phase, the following provision will apply:

a) for equipment manufactured or imported after the effective date of this NR, the TH must be performed during the initial safety inspection;

b) for equipment in operation before this NR took effect, the TH must be performed in the next periodic safety inspection at the

discretion of PH.

13.4.4.4 The periodic safety inspection, consisting of internal and external examinations, must be performed in the

following maximum time intervals:

a) 12 (twelve) months for Category A, B and C boilers;

b) 15 (fifteen) months for alkali recovery boilers of any category;

c) 24 (twenty-four) months for Category A boilers, provided that that the opening pressures of the safety valves are tested at

12 (twelve) months.

13.4.4.5 Establishments that have their own In-house Equipment Inspection Service [Serviço Próprio de Inspeção de

Equipamentos] – SPIE, as established in

Annex II can extend the periods between the safety inspections, respecting the following maximum intervals.

a) 24 (twenty-four) months for alkali recovery boilers;

b) 24 (twenty-four) months for Category B and C boilers;

c) 30 (thirty) months for Category A boilers;

d) 40 (forty) months for special boilers as defined in item 13.4.4.6.

13.4.4.6 Boilers operating continuously and using gases or residues from process units as the main fuel for heat

development or for environmental control purposes may be considered special when all the following conditions are met:

a) they are installed in establishments that have the SPIE mentioned in Annex II;

b) the interlocking system and the opening pressure of each safety valve have been tested every 12 (twelve) months;

c) no unexpected variations appear in the outlet gas and steam temperature during operation;

d) there is a periodic water quality analysis and monitoring;

e) there is a monitoring of deterioration of materials comprising the main parts of the boiler;

f) there is a PH technical opinion report that supports the decision.

13.4.4.6.1 The employer must, in advance, notify the Regional Body of the Ministry of Labor and Employment and the predominant labor union in the establishment of the classification of the boiler as special.

13.4.4.7 At most, upon completing 25 (twenty-five) years of use, in their subsequent inspection, boilers must undergo an integrity evaluation of major scope to determine their remaining service life and new maximum time intervals for inspection, if they are still in working order.

13.4.4.8 Safety valves installed in boilers must be inspected periodically as follows:

a) at least 1 (one) time per month, with the manual override lever, in operation, for category B and C boilers,

excluding boilers that vaporize thermal fluid and those working with treated water as set forth in item 13.4.3.3;

b) the flanged or threaded valves must be disassembled, inspected and bench tested and, in the case of welded valves, the same done in the field, with a frequency compatible with their operating history, the inspection intervals stipulated in items

13.4.4.4 and 13.4.4.5, if applicable, being established as the maximum time limits for these activities for the category A and

B boilers.

13.4.4.9 In addition to the tests prescribed in item 13.4.4.8, safety valves installed in boilers may undergo accumulation tests, at the PH’s discretion.

13.4.4.10 The special safety inspection must be performed at the following times:

a) whenever the boiler is damaged due to an accident or another event capable of compromising its safety;

b) when the boiler undergoes a major alteration or repair capable of altering its safety conditions;

c) prior to returning the boiler to operation, when it has been idle for more than 6 (six) months;

d) when the boiler installation site has changed.

13.4.4.11 The safety inspection must be conducted under the PH’s technical responsibility.

13.4.4.12 Immediately following the boiler inspection, its operational condition must be recorded in its Safety Log and

the report must be issued within 60 (sixty) days, which will become part of its documentation; this time limit can be

extended to 90 (ninety) days, in case of a general shutdown for maintenance.

13.4.4.13 The employer must notify the labor union of the predominant professional category in the establishment, within a maximum time limit of 30 (thirty) days following the conclusion of the safety inspection, as to the boiler’s operational

condition.

13.4.4.13.1 Upon receipt of a formal request, the employer must send a copy of the inspection report to the representatives

of the predominant union in the establishment, within the maximum time limit of 10 (ten) days following its preparation.

13.4.4.13.2 Representatives of the labor union of the predominant professional category in the establishment may ask the

employer to send a copy of the boiler safety inspection report in a regular manner within 30 (thirty) days following its

preparation, the employer being exempt from complying with items 13.4.4.13 and 13.4.4.13.1.

13.4.4.14 The inspection report mentioned in item 13.4.1.6, line “e,” must be prepared on numbered pages containing at

least:

a) information contained on the boiler nameplate;

b) boiler category;

c) type of boiler;

d) type of inspection performed;

e) inspection starting and ending date;

f) description of the inspections, examinations and tests performed;

g) photographic records of internal examination of boiler;

h) result of the inspections and measures;

i) list of items of this NR that are not being met;

j) necessary recommendations and measures;

k) conclusive opinion with regard to the integrity of the boiler until the next inspection;

l) date stipulated for the new boiler safety inspection;

m) legible name, signature and registration number of the PH in the Professional Council and legible name and

signature of the technicians participating in the inspection.

13.4.4.15 The recommendations deriving from the inspection must be recorded and implemented by the employer, establishing the periods and persons responsible for the performing it.

13.4.4.16 Whenever the inspection results call for changes to the design data, the nameplate and the record documentation

must be updated.

13.5 Pressure Vessels

13.5.1 Pressure vessels - general provisions.

13.5.1.1 Pressure vessels are equipment containing fluids under internal or external pressure different from the atmospheric pressure.

13.5.1.2 For the purposes of this NR, pressure vessels are classified into categories according to the fluid class and risk potential.

a) Fluids contained in the pressure vessels are classified as described below: Class A:

- flammable fluids;

- fluids combustible at a temperature greater than or equal to 200 ºC (two hundred degrees Celsius);

- toxic fluids with a tolerance limit equal to or less than 20 (twenty) parts per million (ppm);

- hydrogen;

- acetylene.

Class B:

- fluids combustible at a temperature lower than 200ºC (two degrees Celsius );

- toxic fluids with a tolerance limit greater than 20 (twenty) parts per million (ppm);

Class C:

- steam, simple asphyxiating gases, or compressed air.

Class D:

- other fluid not classified above.

b) When it involves a mixture, the fluid posing the greater risk to the workers and facilities, considering its toxicity,

flammability and concentration, must be considered for purposes of classification.

c) Pressure vessels are classified into potential risk groups based on the P.V. product, where P is the maximum operating pressure in MPa and V its volume in m3, as follows:

Group 1 - P.V ≥ 100 Group 2 - P.V < 100 and P.V ≥ 30 Group 3 - P.V < 30 and P.V ≥ 2.5 Group 4 - P.V < 2.5 and P.V ≥ 1 Group 5 - P.V < 1

d) Pressure vessels operating in a vacuum shall be classified into the following categories:

- category I: for flammable or combustible fluids;

- category V: for other fluids.

e) The table below classifies pressure vessels into categories according to risk potential groups and class of fluid contained.

CATEGORIES OF PRESSURE VESSELS

Fluid

Class

Risk Potential Group

1

P.V ≥ 100 2

P.V < 100

P.V ≥ 30

3 P.V < 30

P.V ≥ 2.5

4 P.V < 2.5

P.V ≥ 1

5 P.V < 1

Categories

A - Flammable fluids and

fluids combustible at a

temperature equal to or

greater than 200ºC - Toxic with tolerance

limit ≤ 20 ppm - Hydrogen - Acetylene

I I II III III

B - Fluids combustible at a

temperature lower than 200

ºC

- Toxic fluids with a tolerance limit > 20 ppm

I

II

III

IV

IV

C

- Steam - Simple asphyxiating gases

- Compressed air

I

II

III

IV

V

D - Other fluid

II

III

IV

V

V

Notes: a) Consider volume in m³ and pressure in MPa; b) Consider 1 MPa corresponding to 10.197 kgf/cm².

13.5.1.3 The pressure vessels must be equipped with the following items:

a) valve or other safety device with an opening pressure set at a value equal to or lower than the MAWP, installed

directly into the vessel or into the system that includes it, considering the design code requirements relative to stepped openings and calibration tolerances;

b) means used against inadvertent blocking of a safety device when it is installed directly onto the vessel;

c) instrument indicating the operating pressure, installed directly onto the vessel or system containing it.

13.5.1.4 Every pressure vessel must have attached to its body, in an easily accessible and readily visible place, an indelible nameplate with, at

least, the following information:

a) manufacturer

b) identification number

c) year of manufacture;

d) maximum permissible working pressure;

e) manufacturing hydrostatic test pressure;

f) design code and year of issuance.

13.5.1.5 In addition to the nameplate, it must have, in a visible place, the vessel category, according to item 13.5.1.2, and its

identification number or code.

13.5.1.6 Every pressure vessel must have the following duly updated documentation, in the establishment where it is installed:

a) Records of the pressure vessel to be supplied by the manufacturer, containing the following information:

- design code and year of issue;

- specification of the materials;

- procedures used in the manufacture, assembly and final inspection;

- methodology for the establishing the MAWP;

- set of drawings and other data necessary for monitoring its service life;

- maximum operating pressure;

- documented records of the hydrostatic test;

- operating characteristics, updated by the employer whenever the originals change;

- data on the safety devices, updated by the employer whenever the originals change; - year built;

- vessel category, updated by the employer whenever the original changes;

b) Safety Log pursuant to item 13.5.1.8;

c) Installation design pursuant to items 13.5.2.4 and 13.5.2.5;

d) Change or repair design in conformity with items 13.3.6 and 13.3.7;

e) Inspection reports in conformity with item 13.5.4.13;

f) Calibration certificates of the safety devices, where applicable.

13.5.1.7 When lacking or missing, the pressure vessel records must be recreated by the employer, with the technical

responsibility of the manufacturer or PH, which is indispensable for reestablishing the design permits, the data of the

safety devices and the MAWP calculation sheet.

13.5.1.8 The Safety Log must consist of a book with numbered pages, folders or computerized system with equivalent

reliability in which the following are recorded:

a) all the important events capable of affecting the safety condition of the pressure vessels;

b) the periodic or special safety inspections performed, which must indicate the operational condition of the vessel.

13.5.1.9 The documentation referred to in item 13.5.1.6 must always be available for consultation by operators, maintenance and inspection personnel, and representatives of the workers and the employer in the Internal Commission

for Accident Prevention – CIPA, and the employer must ensure full access to this documentation, including to the representatives of the labor union of the predominant professional category in the establishment, when formally

requested.

13.5.2 Installation of Pressure Vessels.

13.5.2.1 Every pressure vessel must be installed so that all the drains, vents, manholes and level, pressure and temperature gauges, if any, are easily accessible

13.5.2.2 When pressure vessels are installed in closed spaces, installation must meet the following requirements:

a) have at least 2 (two) wide outlets, permanently unobstructed and arranged in different directions;

b) have easy and safe access for maintenance, operation and inspection activities, where open railings, [and] gaps must have

dimensions that prevent people from falling off;

c) have permanent ventilation with air inlets that cannot be blocked;

d) have lighting as per current official standards

e) have an emergency lighting system.

13.5.2.3 If the pressure vessel is installed in an open space, the installation must conform to lines “a”, “b”, “d”

and “e” of the item

13.5.2.2.

13.5.2.4 Responsibility for the installation plan of pressure vessels classified in Categories I, II and III, as per item

13.5.1.2, as it concerns compliance with this NR, belongs to the PH and must adhere to health, safety and environmental aspects presribed in Regulatory Standards, conventions and applicable legal provisions

13.5.2.5 The installation plan must contain at least the floor plan of the establishment, with positioning and category of

each vessel and the safety facilities

13.5.2.6 When the establishment cannot meet the provisions in item 13.5.2.2, an alternative installation plan must be

prepared with complementary safety measures enabling the mitigation of the risks.

13.5.3 Safety in the operation of the pressure vessels.

13.5.3.1 Every pressure vessel classified in categories I or II must have its own operation manual or operation instructions contained in the

operation manual of the unit where it is installed, in Portuguese and easily accessible to operators, containing at least:

a) start and stop procedures;

b) routine operating procedures and parameters;

c) procedures for emergency situations;

d) general health, safety and environmental preservation procedures.

13.5.3.2 Instruments and controls of pressure vessels must be kept calibrated and in good working condition.

13.5.3.2.1 Instruments and controls may be temporarily disabled, as long as this does not have an impact on operational

safety, and that it is prescribed in the formal operating or maintenance procedures or formally supported with documents,

with prior technical analysis and respective contingency measures prepared by the PH.

13.5.3.3 The operation of units that have category I or II pressure vessels must be performed by a trained specialist

according to item “B” of Annex I of this NR.

13.5.4 Safety inspection of pressure vessels

13.5.4.1 Pressure vessels must undergo initial, periodic and special safety inspections

.

13.5.4.2 The initial safety inspection must be performed on new vessels, before they go into operation, at the final

installation site, and must include external and internal examinations

13.5.4.3 Pressure vessels must necessarily be subjected to Hydrostatic Testing in their manufacturing phase with proof via

a certificate signed by a PH, and have the test pressure valve affixed onto their nameplate.

13.5.4.3.1 In the absence of documentary proof that the Hydrostatic – TH was performed in the manufacturing phase, the following provision will apply:

a) for equipment manufactured or imported after the effective date of this NR, the TH must be performed during the

initial safety inspection;

b) for equipment in operation before this NR took effect, at the discretion of PH, the TH must be performed in the next periodic

safety inspection.

13.5.4.4 Category IV or V pressure vessels from mass production, certified by INMETRO (National Institute of

Measurement, Quality and Technology), that have a factory-calibrated safety valve are exempt from initial inspection and

the documentation referred to in item 13.5.1.6 “c,” as long as they are installed according to the manufacturer’s

recommendation.

13.5.4.4.1 The pressure vessel installation date from which the counting of the period for the periodic safety inspection

begins must be noted in the Safety Log.

13.5.4.5 The periodic safety inspection, consisting of external and internal examinations, must conform to the following

maximum periods established as follows:

a) for establishments that do not have an SPIE, as mentioned in Annex II

Vessel Category External Examination Internal Examination

I 1 year 3 years

II 2 years 4 years

III 3 years 6 years

IV 4 years 8 years

V 5 years 10 years

b) for establishments that do not have their SPIE as stated in Attachment II, considering the tolerances stipulated therein:

Vessel Category External Examination Internal Examination

I 3 years 6 years

II 4 years 8 years

III 5 years 10 years

IV 6 years 12 years

V 7 years at discretion

13.5.4.6 Pressure vessels that do not allow visual access for internal or external examination due to physical impossibility must alternatively undergo other nondestructive testing and integrity evaluation methodologies, at the PH’s discretion, based on standards and

codes applicable to identification of deterioration mechanisms.

13.5.4.7 For pressure vessels with internal filling or with a catalyst the frequency of internal examination can be extended so as to coincide with time of the filling or catalyst

replacement, as long as this extension is preceded by studies conducted by a PH, based on applicable standards and codes, where alternative technologies are implemented for

evaluation of their structural integrity.

13.5.4.8 Pressure vessels with an operating temperature of less than 0ºC (zero degrees Celsius) that operate under conditions where experience shows that there is no

deterioration, must undergo an internal examination every 20 (twenty) years and an external examination every 2 (two) years.

13.5.4.9 Safety valves of pressure vessels must be disassembled, inspected and calibrated with an appropriate time interval for their maintenance, however, not greater than that provided for the periodic internal safety inspection of the pressure

vessels protected by them.

13.5.4.10 The special safety inspection must be performed at the following times:

a) whenever the vessel is damaged by an accident or other occurrence that compromises its safety;

b) when the pressure vessel undergoes repair or significant changes, capable of changing its safety condition;

c) before the pressure vessel is put back in operation, when it remains idle for more than 12 (twelve) months;

d) when there is a change in installation site of the vessel, except for mobile vessels.

13.5.4.11 The safety inspection must be conducted under the PH’s technical responsibility.

13.5.4.12 Immediately after the boiler inspection, its operational condition must be recorded in the Safety Log and the

report must be issued within 60 (sixty) days, which now becomes part of its documentation; this time interval can be

extended to 90 (ninety) days in case of a general stop for maintenance.

13.5.4.13 The inspection report mentioned in item 13.5.1.6 line “e,” must be prepared on numbered pages, containing at least:

a) identification of the pressure vessel;

b) service fluids and category of the pressure vessel;

c) type of pressure vessel;

d) inspection start and ending date;

e) type of inspection performed;

f) description of examinations and tests performed;

g) result of inspections and interventions performed;

h) conclusive opinion with regard to the integrity of the pressure vessel until the next inspection;

i) necessary recommendations and measures;

j) expected date for next inspection;

k) legible name of PH, signature and registration number in the Professional Council and legible name and signature of

technicians who participated in the inspection.

13.5.4.14 Whenever the inspection results determine changes to design conditions, the nameplate and the record documentation must be updated.

13.5.4.15 Recommendations derived from the inspection must be implemented by the employer, with determination of deadlines and those responsible for its execution.

13.6 Piping

13.6.1 Piping - General Provisions

13.6.1.1 The companies that have piping and piping systems contained in this NR must have an inspection program and

plan that takes into account, at a minimum, the variables, conditions and premises described below:

a) the conveyed fluids;

b) working pressure;

c) working temperature;

d) the mechanisms of foreseeable damages;

e) consequences for workers, facilities and environment brought about by potential piping failures.

13.6.1.2 Piping or piping systems must have safety devices, according to criteria of the design code used, or following the

study recommendations of failure scenario analyses.

13.6.1.3 Piping or piping systems must have an operating pressure gauge, as defined in the process and instrumentation

design.

13.6.1.4 Every establishment that contains piping, piping systems or lines must have the following documentation duly updated:

a) specifications applicable to piping or systems, necessary for the planning and execution of their inspection;

b) engineering flow chart with identification of the line and its accessories;

c) PAR pursuant to items 13.3.6 and 13.3.7;

d) inspection reports pursuant to item 13.6.3.8.

13.6.1.5 Documents referred to in item 13.6.1.4 when nonexistent or lost, must be recreated by the employer, under the

technical responsibility of a PH.

13.6.1.6 Documentation referred to in item 13.6.1.4 must always be available for supervision by the appropriate authority

of the Regional Agency of the Ministry of Labor and Employment, and for consulting by operators, maintenance and

inspection personnel and representatives of workers and employer in the Internal Commission for Accident Prevention - CIPA, and the employer must ensure access to this documentation by labor union representatives of the predominant

professional category in the establishment, when formally requested.

13.6.2 Safety in Pipe Operation

13.6.2.1 Pipe pressure gauging devices must be kept in good operating condition.

13.6.2.2 Steam piping and its accessories must be kept in good operating condition, according to a maintenance plan

prepared by the establishment

13.6.2.3 Piping and pipe systems must be traceable according to standards formally instituted by the establishment and marked with signs according to NR-26.

13.6.3 Periodic Pipe Inspection

13.6.3.1 An initial safety inspection must be performed on the piping.

13.6.3.2 Piping must undergo periodic safety inspections.

13.6.3.3 Pipe inspection intervals must meet the maximum terms for internal inspection of the most critical vessel or boiler

connected to them and they may be extended through the inspection program prepared by the PH, technically supported

based on a damage mechanism and on the critical nature of the system, containing the intervals between these inspections

and the examinations comprising them, as long as this extension does not exceed the maximum 100% (one hundred percent) interval on the internal inspection period, limited to 10 (ten) years.

13.6.3.4 The periodic inspection intervals for pipes may not exceed the terms established in their inspection program,

considering the tolerances allowed for companies with SPIE.

13.6.3.5 The inspection program may be prepared per pipe, line or system, at the PH’s discretion and in case of

programming per system, the interval to be adopted must be that of its most critical line.

13.6.3.6 Periodic pipe inspections must consist of examinations and analyses defined by the PH, which allow an evaluation

of the pipe structural integrity according to applicable standards and codes.

13.6.3.6.1 In case of risk to the health and physical integrity of workers involved in the execution of the inspection, the

line must be taken out of operation.

13.6.3.7 A special inspection must be performed in the following situations:

a) whenever the pipe is damaged due to an accident or other event that compromises workers’ safety;

b) when the pipe undergoes temporary repair or significant changes, capable of changing its fluid containment capacity;

c) before the pipe is put back into operation, when it remains idle for more than 24 (twenty-four)

months.

13.6.3.8 The periodic pipe inspection must be performed under the PH’s technical responsibility.

13.6.3.9 After inspection of each pipe, pipe system or line, an inspection report must be issued with numbered pages that becomes

a part of its documentation, which must contain at least:

a) identification of pipe line(s) or system;

b) pipe service fluids, and respective operating temperature and pressure;

c) start and ending date of the inspection

d) type of inspection performed;

e) description of examinations performed;

f) result of the inspections;

g) conclusive opinion on the pipe integrity, pipe system, or the line until the next inspection;

h) necessary recommendations and provisions;

i) expected date for the next inspection;

j) legible name, signature and registration number of the PH in the Professional Council and legible name and signature of

the technicians participating in the inspection;

13.6.3.9.1 Deadline for issuance of this report is up to 30 (thirty) days for individual lines and up to 90 (ninety) days for pipe systems.

13.6.3.10 Recommendations derived from the inspection must be implemented by the employer, with determination of

deadlines and those responsible for their execution.

Glossary

Stepped opening of safety valves – calibration condition differentiated from the opening pressure of one or multiple safety valves, provided in the design code of the equipment protected by them, where opening values above MAWP can be

established, having considered the necessary flow rates for overpressure relief in different scenarios.

Adaptation to use – multidisciplinary conceptual engineering study, based on codes or standards, such as API 579-

1/ASME FFS-1 - Fitness - for - Service, used to determine whether a piece of equipment with known wear will be fit for

safely operating for a certain time

Alteration – change to manufacturer’s original design, which promotes changes to structural or significant operational

parameters defined by the PH, or affects the capacity to hold pressure or may compromise the safety of boilers, pressure

vessels and pipe.

Integrity evaluation or inspection – set of strategies or techniques used in detailed evaluation of the physical condition of a piece of equipment.

Thermal Fluid Boiler – boiler used for heating a fluid in liquid state, called thermal fluid, without vaporizing it.

Alkali Recovery Boilers – steam boilers that use as main fuel the black liquor derived from the cellulose manufacturing

process, performing recovery of chemicals and power generation.

Design Code – set of standards and rules that establishes requirements for equipment design, construction and inspection, assembly, quality control of the equipment manufacture and inspection.

Post-construction codes – consists of standards or practical recommendations for evaluating the structural integrity of

equipment during its service life.

Construction – process that includes material design, specification, manufacture, inspection, examination, testing and

evaluation in conformity with boilers, pressure vessels and pipes.

Quality Control – set of actions intended to verify and certify the conformity of boilers, pressure vessels and their

interconnection pipes in the manufacture, assembly or maintenance stages. The actions cover monitoring of welding work, materials used and performance of examinations and tests, such as penetrating liquid, magnetic particle,

ultrasound, visual, pressure tests, radiography, acoustic emission and eddy currents.

Device Against Inadvertent Blocking - DCBI – means used to prevent that inadvertent blocking prevents the activation of

safety devices.

Safety Devices – devices or components that protect a piece of equipment against gauge overpressure, independent of the

operator’s action and driven by an external energy source.

Pipeline – piping designed by specific codes, intended for transfer of fluids between industrial units of different industrial

establishments or not, occupying third party areas.

Employer - individual or collective enterprise, which, assuming the risks of the economic activity, hires, pays and

directs the personal provision of services; the employer is comparable to independent professionals, charitable

institutions, recreational associations, or other nonprofit institutions that hire workers as employees.

Internal fill - materials inserted in the inside of pressure vessels with specific purposes and determined service life period,

catalyst type, fill, molecular screen and activated charcoal. Trays and internal accessories do not constitute internal fill.

Pipe specification – alphanumeric code that defines pressure class and pipe and pipe accessory materials.

Examination – activity conducted by qualified or certified PHs or technicians, where required by codes or standards,

to evaluate that certain products, processes or services are in conformity with specified criteria.

External examination – examination of the surface and external components of a piece of equipment, which may be performed while operating, in order to evaluate their structural integrity.

Internal examination – examination of internal surface and internal components of a piece of equipment, performed

visually, using appropriate assays and tests to evaluate their structural integrity.

Manufacturer – company responsible for construction of boilers, pressure vessels or pipe.

Engineering flow chart (P&ID) - diagram showing process flow with equipment, piping and its accessories, and instrumentation control grids.

Process flow chart - schematic diagram of the process of industrial plants showing the route or path traveled by fluids.

Force Majeure – any unavoidable event, in relation to employer’s will and to which the latter did not directly or indirectly

contribute. Employer’s lack of foresight excludes Force Majeure.

Steam generator – equipment for producing steam at greater than atmospheric pressure, without accumulation, which is not

included within the pressure vessel codes.

Special safety inspections – inspection performed due to unusual occurrences that can affect the physical condition of the

equipment, such as extended hibernation, change of location, development of unexpected deformations, large-impact

mechanical collisions, or leaks, among others, involving boilers, pressure vessels and pipe, with coverage defined by a

PH.

Initial safety inspections – inspection performed on new equipment, assembled in the final installation site and before it goes into operation.

Periodic safety inspection – inspections performed during service life of a piece of equipment, with criteria and periodic

intervals determined by a PH, in compliance with maximum intervals established in this Standard.

Monitoring or control instruments – devices used for monitoring or control of operational variables of equipment of the

control room or appropriate equipment.

Structural integrity – set of physical properties and characteristics required for a piece of equipment or item to perform

those functions for which it was designed safely and efficiently.

Line – individual pipe section between two defined points, which adheres to a single specification of materials, transported

products, design pressure and temperature.

Predictive maintenance – maintenance with emphasis on prediction of failure and on actions based on the condition of the

equipment to prevent its failure or degradation.

Preventive maintenance – maintenance performed at predetermined intervals or according to prescribed criteria, and

intended to reduce the probability of failure or degraded operation of a component.

Fluid machinery – machinery whose main function is to exchange energy with a fluid that passes through it.

Damage mechanisms - set of factors causing degradation in equipment and components.

Machine package – set of equipment and devices comprising auxiliary fluid machinery systems for cooling, lubrication, or

sealing purposes.

Qualified Specialist – a professional with knowledge and skills enabling the performance of certain tasks, and certified

where required by code or standard.

Nameplate - plate containing equipment information according to requirements established in this Standard, mounted in a visible place.

Inspection Plan - description of the activities, including the examinations and tests to be performed, necessary for

evaluating the physical conditions of the boilers, pressure vessels and piping, considering the history of the equipment and

the mechanisms of foreseeable damage.

Maximum Allowable Working Pressure (MAWP) –is the highest pressure to which a piece of equipment can be

continuously subjected, in accordance with the design code, strength of materials used, dimensions of the equipment and its operational parameters.

Inspection Program – schedule containing, among others, dates of periodic safety inspections to be performed.

Change or Repair Plans – PAR (Brazilian acronym) – a plan performed in connection with repair or change that involves structural intervention or significant process change to boilers, pressure vessels and pipe.

Alternate Installation Plan – a plan conceived to minimize safety impacts for the worker when the installations are not

meeting a certain item of this NR.

Installation Plan – plan containing the positioning of safety equipment and systems within the facilities and, if applicable,

accesses to their accessories (vents, drains, instruments). The facility design consists of the inventory of safety valves with the respective DCBIs and protected equipment.

Records – set of documents and records of the construction design, manufacture, assembly, inspection and maintenance of

equipment.

Movable vessels – pressure vessels that can be moved within a facility or between facilities, which cannot be classified as

transportable.

Transportable vessels – vessels designed and built to be transported pressurized.

Safety Log – log of the occurrence of inspections or abnormal conditions during operation of boilers and pressure vessels,

maintained by a PH or by operational, inspection or maintenance personnel, directly involved with the event triggering the

notation.

Inspection Report – formal record of results of inspections performed on equipment with a conclusive finding.

Repair – intervention undertaken to correct damages, defects or failures in equipment and their components, in order to restore the condition of the construction design.

Emergency lighting system – system intended to provide required lighting to access a piece of equipment or facility safely

in the event of inoperable main systems intended for such purpose.

Boiler interlocking system – management system of activities of two or more protection devices or instruments monitored

by a safety interface.

Pipe system – set consisting of lines and pipes that performs a process function, or that were grouped together for

inspection purposes, with technical or similar process characteristics.

SPIE – In-house Equipment Inspection Service.

Airtight Seal Test – type of pressure test performed for the purpose of certifying fluid retention capacity, without leaks, in equipment, pipe and

its connection fittings before it goes into or re-enters operation.

Hydrostatic Test – TH (Portuguese acronym) - type of pressure test with non-compressible fluid, performed in order to evaluate the structural integrity of equipment and the rearrangement of potential residual stresses, according to the design code.

Piping – set of lines, including their accessories, designed per specific codes for piping intended for conveyance of fluids

between pieces of equipment of the same industrial unit of the same company, equipped with boilers or pressure vessels.

Process Units – set of equipment and interconnections of a manufacturing unit designed to transform raw materials into products.

Pressure Vessels – reservoirs designed to safely withstand internal pressures different from atmospheric pressure, or subjected to external pressure, thus complying with their

basic function in the process in which they are incorporated; for purposes of this NR, the following are included:

a) heat exchangers, evaporators and similar equipment;

b) pressure vessels or parts subjected to direct flame that are not within the scope of other NR’s, nor of the items

13.2.2 and 13.2.1, line “a)” of this NR;

c) jacketed pressure vessels, including reboilers and reactors;

d) autoclaves and thermal fluid boilers.

Remaining life – estimate of remaining lifetime of a piece of equipment or accessory, made during evaluations of its integrity, in pre-determined periods.

Service life – lifetime estimated in the design phase for a piece of equipment or accessory.

Volume - useful internal volume of the pressure vessel, excluding the volume of internal accessories, fills, or catalysts.

ANNEX I PERSONNEL

TRAINING

A. Boilers

A1 General Provisions

A1.1 For purposes of this NR, the boiler operator shall be deemed the person who meets one of the following

conditions

a) has a certificate of Safety Training in Boiler Operation and proof of hands-on apprenticeship as per item A1.5 of

this Annex;

b) has a certificate of Safety Training in Boiler Operation provided in NR 13 approved by Order.

SSMT No. 02, dated May 08, 1984 or in Order SSST No. 23, of December 27, 1994

A1.2 The minimum prerequisite for participation as a student in Safety Training in Boiler Operation is the certificate of

completion of basic learning.

A1.3 The Safety Training in Boiler Operation must necessarily:

a) be technically supervised by a PH;

b) be administered by professionals trained for that purpose;

c) at a minimum, comply with the curriculum proposed in item A2 of this Annex.

A1.4 Those responsible for promotion of Safety Training in Boiler Operation will be subject to the prohibition on

conducting new courses, as well as other applicable legal penalties, in case of non-observance of the provisions in item

A1.3 of this Annex

A1.5 Every boiler operator must complete a hands-on apprenticeship in the operation of the actual boiler that he will

operate, which shall be supervised and documented and have minimum duration of:

a) Category A boilers: 80 (eighty) hours;

b) Category B boilers: 60 (sixty) hours;

c) Category C boilers: 40 (forty) hours.

A1.6 The establishment where the supervised hands-on apprenticeship will be performed, as provided in this NR, must

report, when requested by the labor union representatives of the predominant professional category in the establishment:

a) period of apprenticeship;

b) entity, employer or professional responsible for Safety Training in Boiler or

Process Unit Operation;

c) list of apprenticeship participants.

A1.7 Training must be conducted as a refresher course for workers directly or indirectly involved with the operation of

the facilities, whenever significant modifications occur in the operation of pressurized equipment or replacement of methods, processes and work organization.

A2 Minimum Curriculum for Safety Training in Boiler Operation.

1. Notions of physical magnitudes and units. Duration: 4 (four) hours

1.1. Pressure 1.1.1. Atmospheric Pressure

1.1.2. Internal pressure of a vessel

1.1.3. Manometer pressure, relative pressure and absolute pressure

1.1.4. Pressure units 1.2. Heat and temperature

1.2.1. General Notions: what is heat, what is temperature

1.2.2. Heat Transfer Modes

1.2.3. Specific heat and perceptible heat

1.2.4. Heat Transfer at constant temperature 1.2.5. Saturated Steam and Superheated Steam

1.2.6. Table of saturated steam

2. Boilers – General Considerations. Duration: 8 (eight) hours

2.1. Types of boilers and their uses

2.2. Parts of a boiler

2.2.1. Fire-tube boilers

2.2.1. Water Tube Boilers

2.2.3. Electrical Boilers

2.2.4. Solid Fuel Boilers

2.2.5. Liquid Fuel Boilers

2.2.6. Gas Boilers

2.2.7. Burners 2.3. Boiler Control Instruments and Devices

2.3.1. Feed Device

2.3.2. Level Viewer 2.3.3. Level Control System

2.3.4. Pressure Gauges

2.3.5. Safety Devices

2.3.6. Auxiliary Devices

2.3.7. Valves and Pipe

2.3.8. Smoke removal

3. Boiler Operation. Duration: 12 (twelve) hours

3.2. Start and stop

3.2. Regulation and control

3.2.1. of temperature 3.2.2. of pressure

3.2.3. of energy supply

3.2.4. of the water level

3.2.5. of pollutants 3.3. Operation failures, causes and provisions

3.4. Daily Inspection Chart

3.5. Operation of a system with several boilers

3.6. Procedures during emergency situations

4. Water Treatment and Boiler Maintenance. Duration: 8 (eight) hours

4.1. Water impurities and their consequences 4.2. Water Treatment

4.3. Boiler Maintenance

5. Prevention against explosions and other risks. Duration: 4 (four) hours

5.1. General risks of accidents and health risks

5.2. Explosion risks

6. Legislation and Standardization. Duration: 4 (four) hours

6.1 Regulatory Standards

6.2 Regulatory Standard 13 - NR-13

B. Pressure Vessels

B1 General Provisions

B1.1 The operation of process units that have category I or II pressure vessels must be performed by a specialist with Safety Training in the Operation of Process Units.

B1.2 For purposes of this NR, the individual who meets one of the following conditions shall be considered to be

a specialist with Safety Training in Operation of Process

Units:

a) has a certificate of Safety Training in the Operation of Process Units, issued by a competent institution for

training;

b) has proven experience in operation of category I or II pressure vessels of at least 2 (two) years before the effective date of

NR13 approved by Order SSST No. 23, of December 27, 1994.

B1.3 The minimum pre-requisite for participation, as a student, in the Safety Training in the Operation of Process

Units is the certificate of completion of basic education.

B1.4 Safety Training in the Operation of Process Units must necessarily:

a) be technically supervised by a PH;

b) be administered by professionals trained for that purpose;

c) as a minimum, comply with the curriculum proposed in the item B2 of

this Annex.

B1.5 Those responsible for promoting Safety Training in the Operation of Process Units will be subject to the prohibition on

conducting new courses, as well as other applicable legal penalties, in case of non-observance of provisions in item B1.4.

B1.6 Every specialist with Safety Training in the Operation of Process Units must complete a supervised hands-on

apprenticeship in the operation of pressure vessels lasting 300 (three hundred) hours for the set of all category I or II vessels;

B2 Minimum Curriculum for Safety Training in the Operation of Process Units.

1. Concepts of physical magnitudes and units. Duration: 4 (four) hours

1.1. Pressure

1.1.1. Atmospheric Pressure

1.1.2. Internal pressure of a vessel

1.1.3. Manometer pressure, relative pressure and absolute pressure 1.1.4. Pressure units

1.2. Heat and temperature

1.2.1. General Notions: what is heat, what is

temperature

1.2.2. Heat Transfer Modes

1.2.3. Specific heat and perceptible heat

1.2.4. Heat Transfer at constant temperature

1.2.5. Saturated Steam and Superheated Steam

2. Process equipment. Duration established according to the complexity of the unit, maintaining a minimum of 4 (four)

hours per item, where applicable. 2.1. Heat exchangers 2.2. Piping, valves and accessories

2.3. Pumps

2.4. Turbines and ejectors

2.5. Compressors

2.6. Towers, vessels, tanks and reactors

2.7. Furnaces

2.8. Boilers

3. Electricity. Duration: 4 (four) hours

4. Instrumentation. Duration: 8 (eight) hours

5. Unit operation. Duration: established according to complexity of the unit 5.1. Process description

5.2. Start and stop

5.3. Emergency procedures

5.4. Disposal of chemicals and environmental preservation

5.5. Evaluation and control of risks inherent to the process 5.6. Prevention against deterioration, explosion and other risks

6. First Aid. Duration: 8 (eight) hours

7. Legislation and Standardization. Duration: 4 (four) hours

ANNEX II

REQUIREMENTS FOR CERTIFICATION OF AN IN-HOUSE EQUIPMENT INSPECTION SERVICE -

SPIE.

Before implementing the special periods between inspections, established in items 13.4.4.5 and 13.5.4.5 “b)” of this NR,

the company’s "In-house Equipment Inspection Services", organized as a sector, section, department, division, or

equivalent, must be certified by Product Certification Entities - OCPs accredited by INMETRO, that will verify through

scheduled audits, compliance with the following minimum requirements stated in lines “a” to “h.”

a) presence of the company’s own personnel where boilers or pressure vessels are installed, exclusively dedicated to inspection activities, evaluation of integrity and residual life, with education, qualification and training compatible

with the proposed safety preservation activity;

b) labor force hired for non-destructive tests certified according to current regulations and services of any nature, selected and

evaluated according to criteria similar to those used for its own labor force;

c) proposed equipment inspection service has an individual responsible for its management, formally assigned for this job

title;

d) presence of at least 1 (one) PH;

e) existence of conditions for maintenance of updated technical file, necessary for compliance with this NR, as well as mechanisms for distribution of information when required;

f) existence of written procedures for the main activities performed;

g) existence of equipment consistent with the performance of the proposed activities;

h) minimum fulfillment of the inspection schedule.

The SPIE certification and its maintenance are subject to the specific Regulations of INMETRO.