8/10/2019 NR-13 (English 2014)

1/21

NR-13 - BOILERS, PRESSURE VESSELS AND PIPES

Publications D.O.U.

Decree GM n. 3.214, 8th of June, 1978 06/07/78

Alterations/Updates D.O.U.Decree SSMT n. 12, 06th of June 1983 14/06/83

Decree SSMT n. 02, 08th of Maye 1984 07/06/84

Decree SSST n. 23, 27th

December 1994 Rep.: 26/04/95

Decree SIT n. 57, 19th of June 2008 24/06/08

Decree MTE n. 594, 28th April 2014 30/04/14

(Text provided by Decree MTE n. 594, 28th April 2014)

SUMMARY:

13.1. Introduction

13.2. Scope

13.3. General Provisions

13.4. Boilers

13.5. Pressure Vessels

13.6. Pipes

13.7. Glossary

Annex I - Training of Personnel.

Annex II - Requirements for Certification of Self Inspection Service of Equipment.

13.1. Introduction

13.1.1. This Norm - NR sets the minimum requirements for managing the structural integrity of steam boilers, pressure

vessels and their interconnecting pipes in aspects of installation, inspection, operation and maintenance, for the safety and

health of workers.

13.1.2. The owner is responsible for the adoption of certain steps in this Regulatory Standard.

13.2. Scope

13.2.1. This Regulatory Standard should be applied to the following equipment:

a) All equipment classified as boilers according to item 13.4.1.1;

b) Pressure vessels whose PV product exceeds eight (8), where P is the maximum operating pressure in kPa and V

the internal volume in m3;

c)

Pressure vessels containing class A fluid, specified in section 13.5.1.2, paragraph "a", regardless the size and PV

products;

d)

Mobile containers / vessels with a P.V above eight (8) or with Class A fluid specified in paragraph 13.5.1.2,

paragraph "a";

e) Pipes or piping systems connected to boilers or pressure vessels containing class A or B fluids as item 13.5.1.2,

paragraph "a" of this Regulatory Standard.

8/10/2019 NR-13 (English 2014)

2/21

13.2.2. The equipment mentioned below must be subjected to inspections provided in codes and national or international

standards related to them, but shall be exempted from compliance with the other requirements of this Regulatory Standard;

a) Transportable containers / vessels, pressure vessels used for the transportation of products, portable reservoirs of

compressed fluids and fire extinguishers;

b)

Pressure vessels intended for human occupation;

c)

Pressure vessels that are part of a package of fluid rotating machines or alternative party;

d)

Ducts;

e)

Furnaces and pipes for heat exchange;

f)

Tanks and containers for the storage and stocking of fluids not included in standards and codes of the design

related to pressure vessels;

g)

Pressure vessels with an internal diameter below 150mm for Class B, C and D fluids, as specified in section

13.5.1.2, paragraph "a";

h)

Corrugated Plate Heat exchangers

i)

Steam generators not covered in pressure vessels codes;

j)

Instrumentation system tubes with rated 12.7 mm diameter;

k) Public network pipes for the purification and distribution of water, gas and sewage.

13.3. General Provisions

13.3.1. It constitutes a serious and imminent risk (RGI), the non-compliance of any item provided in this RegulatoryStandard that may cause an accident or occupational injury to the employee, with severe physical damages to the body,

especially when:

a) Operation of the equipment covered by this Regulatory Standard without safety devices fitted with set pressure at

or below the maximum allowable working pressure (MAWP) installed directly to the vessel or system, considering

the requirements of the design code for the staggered openings and calibration tolerances;

b) Delay in periodic safety inspection of boilers;

c) Unintentional locking of safety devices for boilers and pressure vessels, or intentional blockage without due

justification, based on codes, standards or formal procedures for equipment operation;

d) Lack of operating device for level control of boiler water;

e) Operation of the equipment covered in this Regulatory Standard when having attested to a deterioration and by a

recommendation for its removal from constant operation due to a conclusive safety inspection report, shall be in

accordance to the respective design code or fit for use;f) Operation of boiler by employees not meeting the requirements of Annex I of this Regulatory Standard, or not

under supervision, monitoring or specific assistance from a qualified operator.

13.3.1.1. For reasons of force majeure and formal justification of the owner, accompanied by technical analysis and their

contingency measures to mitigate the risks elaborated by the Qualified Professional Analysis (A QP or a multidisciplinary

group coordinated by him) a postponement of six (6) months may occur for the deadline of periodic safety inspection of the

boiler.

13.3.1.1.1. The owner must inform the workers union with justification for the postponement of periodic safety inspection

of the boiler.

13.3.2. For the purpose of this Regulatory Standard; the Qualified Professional - (QP) is considered as the one who has legal

authority to pursue the profession of engineering activities related to construction designs, monitoring operation andmaintenance, inspection and supervision of boilers, pressured vessels and pipes, in accordance with the applicable

professional regulations in the country.

13.3.3. All repairs or modifications to the equipment covered by this Regulatory Standard must comply with their design

codes, post-construction and the manufacturers requirements with regards to its:

a) Materials;

b) Implementing procedures;

c) Procedures for quality control;

d) Qualification and certification of personnel.

13.3.4. When the design code is unknown, the original design of the pressure vessel, boiler or pipe must be respected, using

the procedures prescribed by the relevant control codes.

8/10/2019 NR-13 (English 2014)

3/21

13.3.5. In accordance with the QPs criteria, other calculation techniques or advanced procedures can be used to replace

those provided by the design codes.

13.3.6. Alteration or repair designsPAR (ARD) must be designed in advance in the following situations:

a) Whenever the design conditions are changed;

b) Whenever repairs that may compromise safety are made.

13.3.7. The PAR (alteration or repair designs) must:

a) Be designed or approved by a QP;

b) Be provided with the type of materials used, the implementation of the procedures, quality control and the

qualification of personnel performing the alteration / repair;

c) Be disclosed to employees of the establishment involved with the equipment.

13.3.8. Any maintenance work that may require welding or boring. Areas under pressure shall be subjected to examination

or tests for quality control with defined parameters set by the QP in accordance with rules or codes.

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

13.3.10. The owner shall ensure that examinations and tests on boilers, pressure vessels and pipes run in safe conditions for

its operators and other workers that are involved.

13.3.11. The owner must notify the regional office of the Ministry of Labour & Employment and the labour union of the

prevailing professional category in the establishment, when there is an occurrence of a leakage, fire or explosion involving

equipment covered in this Regulatory Standard that may result in one of the following situations:

a) Death of employee(s);

b) Accidents that resulted in the need for hospitalization of employee(s);

c) Events of a major proportion.

13.3.11.1. Notification shall be forwarded by the second business day, of any occurrence that may happen, and must contain:

a) Business name of the company, address, place, date and time of occurrence;

b)

Description of the event;c) Name and function(s) of victim(s);

d) Procedures adopted;

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

f) Copy of the statement of work accidents (SWA).

13.3.11.2. The occurrence of accidents referred to, in item 13.3.11, the owner must notify the union representation of the

employees, predominant in the establishment, to compose a committee of investigation.

13.3.11.3. Workers, based on their training and experience, should stop their tasks, exercising the right to refuse, whenever

they find evidence of serious and imminent risk to their health and safety or others, informing the problems immediately to

his superior.

13.3.11.3.1. It is the duty of the owner:

a) To ensure that workers have the right to stop their activities, exercising the right of refusal in the situations

specified in item 13.3.11.3, and in accordance with item 9.6.3 of the NR9;

b) To take prompt action, where necessary, to control the risks.

13.3.11.4. The owner shall provide, when required by the competent authority of the regional office of the Ministry of

Labour & Employment, the documents mentioned in items 13.4.1.6, 13.5.1.6 e13.6.1.4.

8/10/2019 NR-13 (English 2014)

4/21

13.4 Boilers

13.4.1. Steam boilers - general provisions

13.4.1.1. Steam boilers are devices intended to produce and accumulate steam under greater than atmospheric pressure, using

any energy source, designed according to relevant codes, running up re-boilers and similar.

13.4.1.2. For purposes of this Regulatory Standard, the boilers are classified into three (3) Categories, as follows:

a) Category A boilers: Those whose pressure is greater than or equal to 1960kPA (19.98 kgf/cm2)

b) Category C boilers: Those whose pressure is equal to or less than 588 kPA (5.99 kgf/cm2) and the internal volume

is equal or less than 100 liters (one hundred liters);

c) Category B boilers: All boilers that do not fit the above Categories.

13.4.1.3. The boilers shall have the following items:

a) Safety valve with set pressure of less than or equal to MAWP, taking into consideration the requirements of the

design code on the staggered opening and calibration tolerances;

b) Instrumentation fitted capable of indicating pressure of the accumulated steam;

c) Injector or supply water system independent of the main system that will avoid overheating due to flow

deficiencies above the design temperatures, from not atomized solid fuel boilers or with burning in suspension;

d)

Dedicated system for rapid draining of water in alkali recovery boilers, with automatic actions after actuation by

the operator;

e) Automatic control system of the water level with interlock that prevents overheating due to poor liquid flow.

13.4.1.4. Every boiler must have fixed in its body an indelible/permanent identification plate, in a place easily accessible and

visible, with at least the following information:

a)

Manufacturer's name;

b)

Order number given by the manufacturer of the boiler;

c)

Year of fabrication;

d) Maximum allowable working pressure (in kPa);

e) Hydrostatic Test Pressure (in kPa);

f)

Capacity for steam production;

g)

Heating surface area;

h)

Design code and year of edition.

13.4.1.5. In addition to the nameplate, it shall state in a prominent place, the boiler Category, as defined in section 13.4.1.2

of this Regulatory Standard and its identification number or code.

13.4.1.6. Every boiler shall have, in the site it has been installed, the following records, duly updated:

a) A Boiler Dossier, supplied by its manufacturer, having the following information:

- Design code and year of edition;

- Materials specifications;

- Procedures used during fabrication, assembly and final inspection;

- Methods used to establish the MAWP;

-

Records of hydrostatic test executed by the manufacturer;

- A set of drawings and other necessary data needed to follow the service life of the boiler;

- Functioning characteristics;

- Safety devices data;

- Year of fabrication;

- Boiler Category

b) A Safety Record Book, in accordance with paragraph 13.4.1.9;

c) Installation design in accordance with paragraph 13.4.2.1;

d) PAR (Alteration or repair designs) in accordance with the items 13.3.6 and 13.3.7;

e) Inspection reports, in accordance with paragraph 13.4.4.14;

f) Calibration certificates of safety devices.

8/10/2019 NR-13 (English 2014)

5/21

13.4.1.7. When missing or misplaced, the Boiler Dossier shall be restored by the owner, under the technical responsibility

the manufacturer or the QP. It is indispensable the reconstitution of functional features, data of the safety devices and

procedures for calculating the MAWP devices.

13.4.1.8 When the boiler is sold or transferred to another establishment, the documents mentioned in paragraphs "a", "d" and

"e" of the item 13.4.1.6 shall accompany it.

13.4.1.9. The Safety Record Book shall be made up of a separate book with numbered pages, or other similar system with

equivalent reliability where the following will be recorded:

a) All the relevant events capable to influence on the boiler safety conditions;

b) The events of initial, periodic and extraordinary safety inspections, which must be accompanied with the boiler,

shall have the legible name and signature of the QP and the boiler operator during the time of inspection.

13.4.1.10. In an event where the boiler is deemed to be unsuitable for use, the Safety Record Book shall contain such

information and receive a formal closure.

13.4.1.11. The documentation referred to in Section 13.4.1.6 shall be at all times available for consultation by the operators,

the maintenance and inspection personnel and the representatives of the Internal Commission for Accident Prevention

(CIPA), and the owner must ensure full access to this documentation.

13.4.2. Installation of steam boilers.

13.4.2.1. The authorship of the installation of steam boiler design, as far as the Regulatory Standard is concern, is of the

responsibility of the QP, and shall conform to the safety, health and environment aspects foreseen in the regulatory

standards, convention and legal provisions.

13.4.2.2. The boilers of any establishment shall be installed in a boiler house or in a specific location for this purpose, called

Boiler Area.

13.4.2.3. When the boiler is installed in an open environment, the Boiler Area must meet the following requirements:

a)

Be spaced, at least, 3.0 metres from:

-

Other equipment and facilities

-

Storage fuel tanks, except tanks for the startup of the boiler up to 2000 litres in capacity;-

From the border of third party properties;

- From the border of public roads.

b) Provided with at least two wide exits permanently unobstructed with clear markings and are arranged in different

directions;

c) Provided with an easy and safe access, necessary to the boiler operation and maintenance taking into account the

railing gap dimensions to prevent from falling.

d) Provided with a catchment and discharge gas system for particulate matters from the combustion, to the outside

areas of the operation in accordance to the prevailing environmental standards;

e) Provided with illumination in accordance to the prevailing official standards;

f) Provided with emergency lighting system in case of night operations.

13.4.2.4. When the boiler is installed indoors, the boiler house must meet the following requirements:

a) Constitute a separate building built with fire-resistant material and may only have a wall adjacent to the other

facilities, with the other remaining walls spaced apart with at least 3.0 metres from other installations and property,

public roads and walkways and fuel depots, with the exception of the tanks for startup, up to 2000 litres in

capacity;

b) Provided with at least two wide exits permanently unobstructed with clear markings and are arranged in different

directions;

c) Provided with permanent ventilation with air openings which cannot be blocked;

d) Provided with gas leakage detecting devices when the boiler source of heat is a gaseous fuel;

e) It shall not be used for any other purposes;

f) Provided with an easy and safe access, necessary to the boiler operation and maintenance taking into account the

railing gap dimensions to prevent from falling.

g)

Provided with a catchment and discharge gas system for particulate matters from the combustion, to the outsideareas of the operation in accordance to the prevailing environmental standards;

8/10/2019 NR-13 (English 2014)

6/21

h) Provided with illumination with emergency lightings systems in accordance to the prevailing official standards;

13.4.2.5. When the establishment cannot meet the requirements of 13.4.2.3 and 13.4.2.4 items, an alternative installation

design should be developed with additional safety solutions that allow the mitigation of risks, and communicating with the

predominant union representation of workers within the establishment;

13.4.2.6. The boilers classified in Category A must have instrument panels installed in the control room, built in

accordance to the prevailing Regulatory Standards.

13.4.3 Safe operation of boilers

13.4.3.1. Every boiler shall have an updated operating manual, in Portuguese, within easy access to the operators containing

at least:

a) Procedures for startup and shut down;

b) Routine operational procedures and parameters;

c)

Procedures for emergency situations;

d)

General procedures for safety, health and environmental preservation.

13.4.3.2. Instruments and boiler controls shall be calibrated and maintained in good operating condition.

13.4.3.2.1. Temporary neutralization of instruments and controls may occur since it is not limited to operational safety andwhich are included in the formal procedures of operation and maintenance, or formally justified and documented with

previous technical analysis and their contingency measures to mitigate the risks, elaborated by the technical manager of the

process, with consent of the QP.

13.4.3.3. Water quality shall be monitored and treatment shall be implemented when necessary, to adjust its physiochemical

properties with the operating parameters of the boiler. These treatments are mandatory for boilers classified in Category A,

as item 13.4.1.2 of this Regulatory Standard.

13.4.3.4. Every steam boiler must be under the operation and control of the boiler operator

13.4.3.5. The personnel will be considered as a boiler operator if he meets the requirements of Section A of Annex I of this

Regulatory Standard.

13.4.4. Safety inspection of boilers.

13.4.4.1. Boilers shall be submitted to initial, periodic and extraordinary safety inspections.

13.4.4.2. An initial safety inspection must be made on new boilers, prior to startup. This will be an on-site inspection, where

it will be subjected to an internal examination, followed by a tightness test and an external examination.

13.4.4.3. The boilers must be subjected to Hydrostatic Testing (HT) in its manufacturing phase, with evidence by an

inspection report signed by the QP, having taken the test pressure value and clearly marked on its nameplate.

13.4.4.3.1. In the absence of documentary proof that the Hydrostatic Test (HT) has been carried out at the manufacturing

phase, the provisions below shall be applied:

a) Equipment manufactured or imported from the validity of this Regulatory Standard, the HT must be done during

the initial safety inspection;

b) For equipment in operation prior to the validity of this Regulatory Standard; it is at the discretion of the QP, HT

shall be held during the next periodic safety inspection.

13.4.4.4. The periodic safety inspection, constituted by an internal and external examinations shall be performed by the

following deadlines:

a) Twelve (12) months for boilers of Categories A, B and C;

b) Fifteen (15) months for alkalis recovery boilers of any Category;

c) 24 (Twenty Four) months for Category A boilers, since the set pressure of the safety valves are tested within 12

(Twelve) months.

8/10/2019 NR-13 (English 2014)

7/21

8/10/2019 NR-13 (English 2014)

8/21

13.4.4.14. The inspection report mentioned in section 13.4.1.6, paragraph "e", must be drafted into numbered pages

containing at least:

a) The recorded data on the identification plate of the boiler;

b) Boiler Category;

c)

Type of boiler;

d)

Type of inspection performed;

e)

Date of commencement and completion of inspection;

f)

Description of inspections, examinations and tests performed;

g)

Photographic records of the internal examination of the boiler;

h)

Results of the inspections and measures;

i)

List of items of this Regulatory Standard that are not being complied;

j)

Necessary recommendations and measured;

k)

A conclusive report about the integrity of the boiler until the next inspection;

l)

An expected date for the new safety inspection of the boiler;

m)

A legible signature and registration number of the professional register card of the QP; and legible signature of the

technicians who have participated in the inspection.

13.4.4.15. Recommendations of the inspection shall be recorded and implemented by the owner, with deadlines and

responsibility for the implementation.

13.4.4.16. Whenever the inspection results determine changes in the design condition, the identification plate and the Boiler

Dossier 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 external or internal pressure other than atmospheric.

13.5.1.2. For purposes of this Regulatory Standard, pressure vessels are classified into Categories according to the class of

fluid and potential risks.

a)

The fluid contained in the pressure vessels are classified as follows:

Class A:

Flammable fluids;

Combustible fluids with a temperature greater than or equal to 200 C (two hundred degrees Celsius);

Toxic fluids with tolerance not exceeding twenty (20) parts per million (ppm);

Hydrogen;

Acetylene.

Class B:

Combustible fluids up to 200 C (two hundred degrees Celsius);

Toxic fluids upper tolerance limit to twenty (20) parts per million (ppm).

Class C:

Water vapor, simple asphyxiating gases or compressed air.

Class D:

Other fluids not mentioned above.b) In the case of a mixture fluids; the fluid with the greater risk to workers and facilities, taking into account, its

toxicity, flammability and concentration; shall be considered for the fluid classification.

c)

Pressure vessels are classified into groups of potential risk due to the PV product, where P is the Maximum

Allowable Working Pressure (MAWP) in MPa and V its volume in m3, as follow:

Group 1 - P.V Equal or higher than 100;

Group 2 - P.V

8/10/2019 NR-13 (English 2014)

9/21

d) Pressure vessels operating under the vacuum condition must fall into the following Categories:

Category I: for flammable or combustible fluids;

Category V: for other fluids.

e)

e) The following table classifies the pressure vessels into Categories according to the Potential Risk Groups and

the contained Fluid Class.

PRESSURE VESSELS CATEGORY

Fluid Class

Potential Risk Group

1 2 3 4 5

PV 100PV < 100PV 30

PV < 30 PV 2.5

PV < 2.5PV 1

PV < 1

Categories

Class A I I II III III

Class B I II III IV IV

Class C I II III IV V

Class D II III IV V V

Notes:

a) Consider m in volume and pressure in MPa;

b) Consider 1 MPa corresponding to 10.197 kgf/cm.

13.5.1.3. Pressure vessels shall be equipped with the following items:

a) valve or other safety device with set pressure of less than or equal to the MAWP, installed directly on the vessel or

in the system that includes it, considering the requirements of the design code on the staggered openings and

tolerances calibration;

b) A safety device against a blockage without warning of the valve when it is not installed directly on the vessel;

c) A device or instrument that indicates the operating pressure, installed directly on the vessel or the system that

contains it.

13.5.1.4. Every pressure vessel shall have attached on its body, a visible and of easy and accessible place, an indelible

identification plate with at least the following information:

a)

Manufacturer;

b)

Identification number;

c)

Year of manufacture;

d) Maximum allowable working pressure;

e) Manufacturing hydrostatic test pressure;

f) Design code and year of edition.

13.5.1.5. In addition to the nameplate, there must also be; in a visible location, the Category of the vessel, as item 13.5.1.2,

and its number or identification code.

8/10/2019 NR-13 (English 2014)

10/21

13.5.1.6. Every pressure vessel must have in the establishment where it is installed, the following documentation properly

updated:

a) A Pressure Vessel Dossier to be supplied by the manufacturer, containing the following information:

- Design code and year of edition;

-

Material Specifications;

-

Procedures used in manufacturing, assembly and final inspection;

-

Methodology for establishing the MAWP;

-

Set of drawings and other information necessary for the monitoring of its service life;

-

Maximum operating pressure;

-

Documentary records of hydrostatic test;

-

Functioning characteristic to be updated whenever there are changes from its original;

-

Information of the safety devices to be updated whenever there are changes from its original;

-

Year of Manufacture;

-

Vessel Category to be updated whenever there are changes from its original

b)

A Safety Record Book in accordance with paragraph 13.5.1.8;

c) Installation Design in accordance with 13.5.2.4 and 13.5.2.5 items;

d) Repair or Design Changes in accordance with 13.3.6 and 13.3.7 items;

e) Inspection Reports in accordance with paragraph 13.5.4.13;

f) Calibration Certificates of safety devices, where applicable.

13.5.1.7. When nonexistent or misplaced, the records of the pressure vessel shall be reconstituted by the owner with the

technical responsibility of the manufacturer or the QP being indispensable the rebuilding of the design characteristics, the

data from the safety devices and the determination of the MAWP.

13.5.1.8. The Safety Record Book shall consist of numbered pages, folders, or computerized system with similar reliability;

where the following will be recorded:

a) All the relevant events capable to influence the safety conditions of the pressure vessels;

b) The occurrence of periodic and extraordinary safety inspections, which must contain the operating condition of the

vessel.

13.5.1.9. The documentation referred to in Section 13.5.1.6 shall be at all times available for consultation by the operators,

the maintenance and inspection personnel and the representatives of the Internal Commission for Accident Prevention(CIPA). The owner shall ensure full access to this documentation. Full access of the documentation shall also be available to

the union representatives of the professional category prevailing in the establishment, when it is formally requested.

13.5.2. Installation of pressure vessels.

13.5.2.1. Every pressure vessel shall be installed in a way that all drains, vents, manholes, level gauges, pressure gauges and

temperature gauges, where exist; are easily accessible.

13.5.2.2. When pressure vessels are installed indoors, the installation shall meet the following requirements:

a) Provided with at least two wide exits permanently unobstructed with clear markings and are arranged in different

directions;

b)

Provided with an easy and safe access, necessary to the boiler operation and maintenance taking into account therailing gap dimensions to prevent from falling.

c) Provided with permanent ventilation with air openings which cannot be blocked;

d) Provided with illumination in accordance to the prevailing official standards;

e) Provided with emergency lighting system.

13.5.2.3. When the pressure vessel is installed in an open environment, the installation shall comply with the letters "a", "b",

"d" and "e" of paragraph 13.5.2.2.

13.5.2.4. The classification of the pressure vessels of the installation into Categories I, II and III, as item 13.5.1.2, with

respects to the call of this Regulatory Standard, is the responsibility of the QP and shall conform to the aspects of safety,

health and environment provided in the Regulating Conventions and the applicable legal provisions.

13.5.2.5. The Installation Design must contain at least the general arrangement, with the position and Category of eachpressure vessel and the safety installations.

8/10/2019 NR-13 (English 2014)

11/21

13.5.2.6. When the establishment cannot meet the provisions of section 13.5.2.2, Alternative Installation Design shall be

elaborated, with complementary safety measures that enables risk mitigation.

13.5.3. Safe operation of pressure vessels.

13.5.3.1. Every pressure vessel classified as Categories I or II shall have its own Operation Manual or operation instructions

contained in the Operation Manual of the unit where it is installed; in Portuguese language, and are within easy access to the

operators; containing at least:

a) Procedures for startup and shut down;

b) Routine operational procedures and parameters;

c) Procedures for emergency situations;

d) General procedures for safety, health and environmental preservation.

13.5.3.2. Instruments and boiler controls shall be calibrated and maintained in good operating condition.

13.5.3.2.1. Temporary neutralization of instruments and controls may occur since it is not limited to operational safety and

which are included in the formal procedures of operation and maintenance, or formally justified and documented with

previous technical analysis and their contingency measures to mitigate the risks, elaborated by a QP.

13.5.3.3. The operating of units with pressure vessels of Category I or II shall only be performed by a trained professional as

item "B" in Appendix I of this Regulatory Standard.

13.5.4. Safety inspection of pressure vessels.

13.5.4.1. Pressure vessels must undergo initial, periodic and extraordinary safety inspections.

13.5.4.2. The initial safety inspection must be executed for new pressure vessels, before its commissioning, in the final

location of installation and shall comprise of external and internal examinations.

13.5.4.3. Pressure vessels must be subjected to Hydrostatic Testing (HT) in its manufacturing stage and with evidences and

signed by a QP. The pressure test value shall also be clearly marked on its identification plate.

13.5.4.3.1. In the absence of documentary proof that the Hydrostatic Testing (HT) was conducted at the manufacturing stage;

the following provisions below shall be applied:

a) For equipment manufactured or imported from the validity of this Regulatory Standard, the HT must be done

during the initial safety inspection;

b) To equipment in operation prior to the effect of this Regulatory Standard, HT shall be performed during the next

periodic safety inspection at the discretion of the QP,

13.5.4.4. Pressure vessels Categories IV or V of mass production, certified by the National Institute of Metrology, Quality

and Technology - INMETRO, have a safety valve calibrated at the factory. These pressure vessels are exempted from initial

inspection and documentation referred to in Section 13.5.1.6.(c); when installed according to the manufacturers

recommendations.

13.5.4.4.1. It shall be noted in the Safety Record Book the date of installation of the pressure vessel from which the start of

the periodic safety inspection schedule begins.

13.5.4.5. The periodic safety inspection, consisting of external and internal examinations must obey the following maximum

periods set forth below:

a) To establishments that does not have SPIE (Own Service of Equipment Inspection), as mentioned in Annex II:

Category of the Vessel External Inspection Internal Inspection

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

8/10/2019 NR-13 (English 2014)

12/21

b) To establishments having SPIE (Own Service of Equipment Inspection), as mentioned in Annex II, The tolerances

contained below shall be considered:

Category of the Vessel External Inspection Internal Inspection

I 3 years 6 years

II 4 years 8 years

III 5 years 10 years

IV 6 years 12 years

V 7 years at the discretion of the QP

13.5.4.6. Pressure vessels that does not allow visual access to the internal and external examination due to physical

impossibilities shall be alternatively submitted to other non-destructive tests and methodologies for assessing the integrity, at

the discretion of the QP, based on standards and codes applicable to the identification of mechanisms of deterioration.

13.5.4.7. Pressure vessels with internal filling or catalyst may have its internal examination period extended to coincide with

the date of replacement of the fillers or the catalyst where the examination extend period is preceded by studies conducted by

the QP or multidisciplinary group coordinated by him, based on applicable standards and codes where alternative

technologies for the assessment of structural integrity are implemented.

13.5.4.8. Pressure vessels with operating temperature below 0C (zero degrees Celsius) and that are operating in conditions

on with which the experience show no occurrences of deterioration must undergo internal examination every twenty (20)

years and external examination every two (2) years.

13.5.4.9. The safety valves of pressure vessels shall be disassembled, inspected and calibrated respecting the appropriate

maintenance period, however it shall not be higher than the expected period for internal safety inspection of pressure vessels

protected by them.

13.5.4.10. The extraordinary safety inspection shall be carried out for the following opportunities:

a) At all times whenever the pressure vessel gets damaged by accident or other occurrence which endangers their

safety;b) When the pressure vessel is subjected to repairs or important changes which may alter its safety condition;

c) Prior to the pressure vessel startup, when it has been inactive for more than twelve (12) months;

d) When there is a change in the location of the pressure vessel installation except for mobile vessels.

13.5.4.11. The safety inspection must be carried out under the technical responsibility of the QP.

13.5.4.12. Immediately after the inspection of the pressure vessel, the operating condition of the vessel must be noted in the

Safety Record Book, and in sixty (60) days, a report shall be issued to be part of the documentation. This term may be

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

13.5.4.13. The inspection report mentioned in section 13.5.1.6, paragraph "e" shall be drafted into numbered pages,

containing at least:

a)

Identification of the pressure vessel;

b)

Service Fluids and the Category of the pressure vessel;

c)

The type of the pressure vessel;

d)

Date of commencement and completion of inspection;

e)

Type of inspection performed;

f)

Description of the examinations and tests performed;

g)

Results of the inspection and interventions performed;

h)

A conclusive opinion about the integrity of the pressure vessel until the next inspection;

i)

Necessary recommendations and actions required;

j)

Expected date for the next inspection;

k) Legible name, signature and registration number in the professional council of the QP and legible name and

signature of the technicians whom have participated in the inspection.

8/10/2019 NR-13 (English 2014)

13/21

13.5.4.14. Whenever the inspection results determine changes in the design condition, the identification plate and the

Pressure Vessel Dossier documentation must be updated.

13.5.4.15. The recommendations of the inspection shall be implemented by the owner with deadlines with the person

responsible for its execution.

13.6. Pipes

13.6.1. Pipes - General Provisions

13.6.1.1. Establishments that comes with pipes and piping systems that falls fit into this Regulatory Standard shall have a

program and an inspection plan that considers at least the variables, conditions and assumptions described below:

a) Transported fluids;

b) Working Pressure;

c) Working Temperature;

d)

Assembly of mechanisms with potential damages;

e)

The impact on the workers, the installation and the environment due to possible failure of the pipes.

13.6.1.2. Pipes or piping systems must have safety devices according to the criteria of the design code used, or in compliance

with the recommendations of the study analysis of scenario failures.

13.6.1.3. Pipes or piping systems must have an operating pressure indicator, as defined in the process and instrumentation

design.

13.6.1.4. Every establishment that has pipes, piping systems or pipelines shall have the following documentation properly

updated:

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

b) Engineering drawings/process chart with the identification of the line and its accessories;

c) PAR (alteration or repair designs) in accordance with the items 13.3.6 and 13.3.7;

d) Inspection Reports in accordance with paragraph 13.6.3.9.

13.6.1.5. The documentation referred to in section 13.6.1.4, when missing or misplaced, shall be restored by the owner,

under the technical responsibility of the QP.

13.6.1.6. The documentation referred to in Section 13.6.1.4 shall be at all times available for consultation by the competent

authority or the regional office of the Ministry of Labour & Employment, and for consultation by the operators, the

maintenance and inspection personnel and the representatives of the Internal Commission for Accident Prevention (CIPA).

The owner also has to ensure access to this documentation to the union representatives of the professional category

prevailing in the establishment whenever required.

13.6.2. Safety in pipeline operation

13.6.2.1. Instruments or other devices of pressure indication of pipelines must be kept in good operating condition.

13.6.2.2. Steam pipelines and its accessories shall be kept in good operating conditions in accordance to a maintenance plan

elaborated by the establishment.

13.6.2.3. Pipes and pipeline system shall be identified according to the standards formally instituted by the establishment,

and shall be marked in accordance to NR26.

13.6.3. Periodic inspection of pipelines

13.6.3.1. Initial safety inspection shall be performed on the pipes.

13.6.3.2. The pipelines shall also be subjected to periodic safety inspection.

13.6.3.3. The intervals of pipeline inspection shall meet the deadlines of the most critical internal inspection of pressure

vessels and boilers connected to them and may be extended by the inspection program as elaborated by the QP, based on the

technical justifications related to the damaged mechanism and the criticality of the system. The intervals between theinspections and tests since this extension, does not exceed the maximum interval of 100% (one hundred percent) of the term

of the internal inspection and is limited to 10 (ten) years.

8/10/2019 NR-13 (English 2014)

14/21

8/10/2019 NR-13 (English 2014)

15/21

13.7 Glossary

Scaled opening of safety valvescalibration condition for the opening pressure of multiple safety valves, foreseen in the

code related to the equipment protected by them, where opening values can be configured above the PMTA, considering the

necessary flows to relieve the overpressure in distinct scenarios.

Use adequacyengineering multidisciplinary conceptual study based on codes and norms such as API 579- 1/ASME

FFS-1- Fitness - for - Service, used to determine whether a piece of equipment with known wear and tear is good to safely

operate for a certain amount of time.

Alterationchange in the manufacturers original project that promotes the structural alteration or significant operational

parameters defined by the PH, or that affects the capacity to retain pressure or can jeopardize the safety of boilers, pressure

vessels and pipelines.

Assessment of integrity inspectionset of strategies and techniques used in the detailed assessment of the physical

conditions of a piece of equipment.

Thermal fluid boilerboiler used to heat one fluid in the liquid state, called thermal fluid, without vaporizing it.

Alkali recovery Boilerssteam boilers that use as main fuel the black liquid resulting from the cellulose fabrication

process, performing chemical recovery and power generation.

Project codeset of norms and rules which determine the requirements for a project, construction, assembly, fabricationquality control and equipment inspection.

Post-construction codesconsists of the norms or practical recommendations to assess the structural integrity of equipment

during their life cycle.

Constructionprocess that includes the design, material specification, fabrication, inspection, examining, testing and

conformity assessment of boilers, pressure vessels and piping.

Quality Controlset of actions to verify and confirm the conformity of boilers, pressure vessels and its interconnecting

pipes at the fabrication, assembly or maintenance phases. The actions encompass follow up on the welding, materials used

and performance of exams and tests such as: penetrating liquid, magnetic particles, ultrasound, visual, pressure testing,

radiography, acoustic emission and parasitic current.

Devices against inadvertent blockage - DCBImeans used to prevent that inadvertent blockages impede the actuation of

the safety devices.

Safety devicesdevices or parts that protect a piece of equipment against manometric overpressure, regardless of the

operators action and the activation by an external power source.

Ductpiping designed for specific codes, to transfer the fluids between industrial units and industrial establishments,

different or not, occupying third party areas.

Employerindividual or collective company that taking the risks of the economic activity, hires, pays and directs the

provision of services; similar to the employer are independent professionals, charity institutions, recreational associations or

other non-profit institutions that admit workers as employees.

Internal fillingmaterials inserted inside pressure vessels with specific goals and a determined useful life cycle, like

catalyst, molecular sieve and activated coal. Trays and internal accessories are not considered internal filling.

Piping specificationalphanumeric code that defines the pressure class and the materials of the pipes and piping

accessories.

Examactivity performed by the PH or qualified or certified technicians when requested by codes or norms, to assess

whether certain products, processes or services are in conformity with determined criteria.

External examexam of the surface and the external parts of a piece of equipment, and can be done while in operation in

order to assess its structural integrity.

Internal examexam of the internal surface and internal parts of a piece of equipment, executed visually with the use of

tests that are appropriate to assess the structural integrity.

Manufacturercompany responsible for constructing boilers, pressure vessels or piping.

Engineering flowchart (P&ID)diagram showing the process flow with the equipment, pipes and its accessories and theinstrumentation control grids.

8/10/2019 NR-13 (English 2014)

16/21

Process flowchartdiagram of schematic representation of the process industrial plants showing the path or trajectory of

the fluids.

Force majeureall inevitable events to the employers will and which happened without the employers direct or indirect

interference. The employers negligence is not deemed force majeure.

Steam generatorequipment used to produce steam under pressure higher than the atmospheric, with no accumulation and

not classified in pressure vessel codes.

Inspection of extraordinary safetyinspection performed due to events that can affect the equipments physical condition,

such as prolonged hibernation, change in location, appearance of unexpected deformations, mechanical chocks of great

impact or leaks, amongst others, involving boilers, pressure vessels and piping with coverage defined by PH.

Inspection of initial safetyinspection performed in new equipment, assembled in the final installation location and before

they start operating.

Inspection of periodic safetyinspections performed during the useful life of the equipment, with the criteria and

periodicity determined by the PH, respecting the maximum intervals determined by this Norm.

Monitoring or control instrumentsdevices to monitor or control the equipments operational variables from the control

room or the equipment itself.

Structural integrityset of properties and physical characteristics needed so that a piece of equipment or items perform the

functions to which they were designed, safely and efficiently.

PipeLinepart of piping between two defined points and that follows only one material specification, transported products,

design pressure and temperature.

Predictive maintenancemaintenance with emphasis on predicting the fault and on actions based on the conditions of the

equipment to prevent its fault or degradation.

Preventive maintenancemaintenance performed at pre-determined intervals or in accordance with the prescribed criteria,

designed to reduce the probability of fault or the functional degradation of a component.

Fluid machinesthe ones whose main function is to interchange energy with fluid that passes through them.

Damage mechanismsset of factors that cause degradation in equipment and components.

Machine packageset of equipment and devices part of the fluid machine auxiliary system for the purpose of cooling,lubrication or sealing.

Qualified personnelprofessional with knowledge and skills that allow that certain tasks are exceeded, and certified when

demanded by code or norm.

Identification tagtag containing equipment data according to the requirements determined in this NR affixed in a visible

location.

Inspection Plandescription of activities, including the exams and tests to be done, necessary to assess the physical

conditions of boilers, pressure vessels and piping, considering the history of equipment and the foreseeable damage

mechanisms.

Maximum Allowable Working Pressure (MAWP/PMTA)is the highest pressure value to which one piece of equipment

may be continuously submitted to according to the project code, the resistance of the materials used, equipment dimensions

and its operational parameters.

Inspection Programschedule with all data, inspection dates for the periodic safety inspections to be carried out.

Alteration or repair Projects- PARproject prepared at the time of repair or alteration involving structural intervention or

significant change in boilers, pressure vessels and piping.

Alternative Installation Projectproject designed to minimize the safety impacts on the worker when the installations do

not meet the established in this NR.

Installation Projectproject that has the location of equipment and safety systems within the facilities and when

applicable, accesses to their accessories (vents, drain, instruments). Part of the installation project has the inventory with all

the safety valves with the corresponding DCBI and protected equipment.

Data sheetset of documents and records on the construction design, fabrication, assembly, inspection and maintenance ofthe equipment.

8/10/2019 NR-13 (English 2014)

17/21

8/10/2019 NR-13 (English 2014)

18/21

ANNEX I

PERSONNEL QUALIFICATION

A: Boilers

A1 General Conditions

A1.1 For the purpose of this NR, a boiler operator is considered the person who meets any of the following conditions:

a)

has a Safety Training certificate in Boiler Operation and proof of practical training as per item A1.5 of thisattachment;b) has a Safety training certificate in Boiler Operation foreseen in NR 13 approved by Ordinance SSMT n. 02, 8th

May 1984 or Ordinance SSST n. 23, 27th December 1994.

A1.2 The minimum pre-requirement to participate as a student in the Safety training on Boiler Operation is the certificate ofcompletion of primary education.

A1.3 The safety training on Boiler Operation shall compulsorily:

a) be technically supervised by the PH;b) be offered by qualified professionals for this purpose;c)

comply with, as a minimum, with the syllabus proposed in item A2 of this attachment.

A1.4 The ones responsible for promoting the Safety training on Boilers operation are subject to being prevented fromteaching new courses as well as to the other applicable legal sanctions, in case the provisions of item A1.3 of this annex are

not complied with.

A1.5 All boiler operators shall comply with a practice period operating its own boilers that will operate, which shall be

supervised, documented and have minimum length of:a) boilers in Category A: 80 (eighty) hours;b) boilers in Category A: B: 60 (sixty) hours;

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

A1.6 The establishment where the practice training is done and supervised as foreseen in this NR shall inform when

requested by the union representative of the main professional category of the establishment:

a) training period;b) entity, employer or professional responsible by the Safety Training on Boiler Operation or process unit;c) list of the training participants.

A1.7 Refresher courses must be taken by the employees involved directly or indirectly with the facilities operation wheneversignificant changes occur in the operation of pressurized equipment or changes in methods, processes and work organization.

A2 minimum Syllabus for Safety training on Boiler Operations.

1. Notion on physical magnitudes and units. Number of hours: 4 (four) hours1.1.

Pressure

1.1.1. Atmospheric Pressure1.1.2. Internal pressure of a vessel

1.1.3. Manometric pressure, relative pressure and absolute pressure1.1.4. Pressure Units

1.2. Heat and temperature

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

1.2.2. Ways to transfer heat

1.2.3.

Specific heat and sensible heat1.2.4.

Heat transfer at constant temperature1.2.5. Saturated steam and superheated steam

1.2.6.

Saturated steam table

8/10/2019 NR-13 (English 2014)

19/21

2. Boilersgeneral considerations. Course length: 8 (eight) hours

2.1. Types of boilers and their use2.2.

Parts of a boiler

2.2.1. Flamotubular boilers2.2.2. Aquatubular boilers

2.2.3. Electrical boilers2.2.4. Solid fuel fired boilers2.2.5. Liquid fuel fired boilers

2.2.6.

Gas boilers2.2.7. Burners2.3. Instruments and devices to control boilers

2.3.1. Feeding device2.3.2. Level display

2.3.3. Level control system2.3.4.

Pressure Indicators

2.3.5. Safety devices2.3.6. Auxiliary devices

2.3.7. Valves ad piping2.3.8. Smoke circulation

3. Boiler Operation. Course length: 12 (twelve) hours

3.1. Start-up and shutdown3.2. Adjustment and control

3.2.1.

temperature3.2.2.pressure

3.2.3.

power supply

3.2.4. light water3.2.5.pollutants

3.3. Operational faults, causes and actions

3.4. Guide for daily inspection3.5. Operation of a system with various boilers3.6.

Procedures in emergency situations

4. Water treatment and boiler maintenance. Course length 8 (eight) hours4.1. Water impurities and its consequences4.2. Water treatment4.3. Boiler maintenance

5. Explosion prevention and other risks. Course length: 4 (fours) hours5.1. General accident risks and health risks5.2. Explosion risks

6. Legislation and normalization. Course length: 4 (four) hours6.1.

Regulation Standards

6.2. Regulation Standard 13 - NR-13

8/10/2019 NR-13 (English 2014)

20/21

B. Pressure Vessels

B1 General Conditions

B1.1 The operation of the process units that have pressure vessels of categories I or II shall be performed by a professional

with training on the Safety of the operation of Process Units.

B1.2 For the purpose of this NR, a person will be considered professional with training on safety of the operation of

Process Units the one who meets one of the following conditions:

a) Have a certificate on the Safety training for the Operation of Process units issued by competent training institution;b) Have proven experience in the operation of pressure vessels of categories I or II of at least 2 (two) years before the

enforcement of NR13 approved by Ordinance SSST n 23, 27th December 1994.

B1.3 The minimum pre-requirement to participate as a student in the Safety training on the Operation of Process Units is the

certificate of completion of basic education.

B1.4 The safety training on the operation of process units shall compulsorily:

a)

Be technically supervised by the PH;

b) Be taught by professional qualified for this purpose;

c) Comply with, as a minimum, with the syllabus proposed in item B2 of this Annex.

B1.5 the ones responsible for promoting the safety raining on the operation of process units will be subject are subject tobeing prevented from teaching new courses as well as to the other applicable legal sanctions, in case the provisions of item

B1.4 of this annex are not complied with.

B1.6 all professionals with Safety training on the Operation of Process units must attend a practical supervised training onthe operation of pressure vessels of 300 (three hundred) hours for the set of all pressure vessels of categories I or II.

B2 Minimum syllabus for the Safety raining on the operation of Process Units.

1. Notion on physical magnitudes and units. Course length: 4 (four) hours

1.1. Pressure1.1.1. Atmospheric pressure1.1.2. Internal pressure of the vessel1.1.3. Manometric pressure, relative pressure and absolute pressure

1.1.4.

Pressure units1.2. Heat and temperature

1.2.1. General notions: what is heat, what is temperature1.2.2. Ways to transfer heat1.2.3. Specific heat and sensible heat

1.2.4. Heat transfer at constant temperature1.2.5.

Saturated steam and superheated steam

2. Process equipment. Course length determined in accordance with the complexity of the unit, with the minimum of 4

(four) hours per item, where applicable2.1. Heat exchangers2.2. Piping, valves and accessories

2.3. Pumps

2.4. Turbines and ejectors

2.5.

Compressors2.6.

Towers, vessels, tanks and reactors2.7. Furnaces

2.8.

Boilers

3. Electricity. Course length: 4 (four) hours

4.

Instrumentation. Course length: 8 (eight) hours

5. Unit operation. Course length: according to the complexity of the unit

5.1. Process description5.2. Start-up and shutdown5.3. Emergency procedures

5.4. Disposal of chemical products and environment preservation5.5. Assessment and control of risks related to the process5.6.

Prevention against deterioration, explosion and other risks

6. First aids. Course length: 8 (eight) hours

7.

Legislation and normalization. Course length: 4 (four) hours

8/10/2019 NR-13 (English 2014)

21/21

ANNEX II

REQUIREMENTS FOR THE CERTIFICATION OF THE OWN EQUIPMENT INSPECTION SERVICE -

SPIE

Prior to put in practice the special periods between inspections, established in items 13.4.4.5 e 13.5.4.5, line b) of this NR,

the "Own equipment inspection services" of the company organized per sector, section, department, division or equivalent

shall be certified by Product Certification Bodies - OCP accredited by INMETRO, which will be verified by audits

scheduled to meet the following minimum requirements expressed in lines a to h.

a) the existence of enterprise's own personnel where the boiler or pressure vessel is installed, with exclusive

dedication to inspection, integrity and residual life evaluation activities, with compatible background, qualification

and training with the required activity of ensuring safety;

b) contracted labor to nondestructive testing, certified in accordance with prevailing regulation, and to other

eventual services, selected and evaluated in accordance with similar criteria used with its own labor;

c) equipment inspection service shall have someone responsible for its management, formally designated for this

position;

d) existence of at least one "Qualified Professional"(PH);

e)

existence of conditions to maintain an updated technical file, necessary to consider this Regulation Standard, as

well as means to divulge information when required;

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

g) existence of the correct equipment to perform the proposed activities;

h)

minimal compliance with inspection program.

The SPIE certification and its maintenance are subject to INMETROS specific Regulation