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N-2 REV. L ENGLISH 07 / 2012

PROPERTY OF PETROBRAS 1 page

Anticorrosive Coating of Industrial

Equipment

CONTECComisso de

Normalizao Tcnica

SC-14Painting and Anticorrosive

Coatings 2nd Amendment

This is the 2nd

Amendment to PETROBRAS N-2 REV. L, incorporated the 1st

amendment and it isused to alter the text of the Standard in the parts indicated below:

NOTE 1 The news pages with the performed amendments are placed in its corresponding positions.NOTE 2 The amended pages, indicated the date of the amendment, are placed at the end of this

standard, in chronological order, and shall not be used.

- Section 2: (1st

Amendment)

Inclusion of PETROBRAS N-9.

- Table 1: (1st

Amendment)

Alteration of table.

- Subsection 5.1.1.4:(2nd

Amendment)

Alteration of the Note.
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PROPERTY OF PETROBRAS 7 pages, Index of Revisions and WG

Anticorrosive Coating of Industrial

Equipment

Procedure

This Standard replaces and cancels its previous revision.

The CONTEC - Authoring Subcommittee provides guidance on theinterpretation of this Standard when questions arise regarding its contents. TheDepartment of PETROBRAS that uses this Standard is responsible for adoptingand applying the sections, subsections and enumerates thereof.

CONTECComisso de Normalizao

Tcnica

Technical Requirement: A provision established as the most adequate and

which shall be used strictly in accordance with this Standard. If a decision istaken not to follow the requirement (non-conformity to this Standard) it shall bebased on well-founded economic and management reasons, and be approvedand registered by the Department of PETROBRAS that uses this Standard. It ischaracterized by imperative nature.

Recommended Practice: A provision that may be adopted under the conditionsof this Standard, but which admits (and draws attention to) the possibility ofthere being a more adequate alternative (not written in this Standard) to theparticular application. The alternative adopted shall be approved and registeredby the Department of PETROBRAS that uses this Standard. It is characterizedby verbs of a nonmandatory nature. It is indicated by the expression:[Recommended Practice].

SC - 14

Copies of the registered non-conformities to this Standard that may contribute

to the improvement thereof shall be submitted to the CONTEC - AuthoringSubcommittee.

Proposed revisions to this Standard shall be submitted to the CONTEC -Authoring Subcommittee, indicating the alphanumeric identification and revisionof the Standard, the section, subsection and enumerate to be revised, theproposed text, and technical/economic justification for revision. The proposalsare evaluated during the work for alteration of this Standard.

Painting and AnticorrosiveCoatings

The present Standard is the exclusive property of PETRLEOBRASILEIRO S.A. - PETROBRAS, for internal use in the Company, and anyreproduction for external use or disclosure, without previous and expressauthorization from the owner, will imply an unlawful act pursuant to therelevant legislation through which the applicable responsibilities shall beimputed. External circulation shall be regulated by a specific clause of

Secrecy and Confidentiality pursuant to the terms of intellectual andindustr ial property law.

Introduction

PETROBRAS Technical Standards are prepared by Working Groups - WG

(consisting specialized of Technical Collaborators from Company and its Subsidiaries), are

commented by Company Units and its Subsidiaries, are approved by the Authoring Subcommittees -

SCs (consisting of technicians from the same specialty, representing the various Company Units and

its Subsidiaries), and ratified by the Executive Nucleus (consisting of representatives of the Company

Units and its Subsidiaries). A PETROBRAS Technical Standard is subject to revision at any time by its

Authoring Subcommittee and shall be reviewed every 5 years to be revalidated, revised or cancelled.PETROBRAS Technical Standards are prepared in accordance with PETROBRAS Technical

Standard N-1. For complete information about PETROBRAS Technical Standards see PETROBRAS

Technical Standards Catalog.
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Foreword

This Standard is the English version (issued in 12/2011) of PETROBRAS N-2 REV. L 10/2011. In caseof doubt, the Portuguese version, which is the valid document for all intents and purposes, shall beused.

1 Scope

1.1 The objective of this Standard is to establish the procedure for selection of the internal andexternal paint system of industrial equipments.

1.2 The internal anticorrosive coatings are applied on painting of onshore and offshore facilities andexternal coatings only in onshore facilities.

1.3 This Standard is applied to procedures started after its date of issuance.

1.4 This Standard contains Technical Requirements and Recommended Practices.

2 Normative References

The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument applies.

PETROBRASN-9- Treatment of Steel Surfaces by Abrasive Blasting and Water Jetting;

PETROBRASN-13 - Technical Requirements for Paintwork;

PETROBRAS N-268- Fabrication of Pressure Vessel;

PETROBRASN-1202- Iron Oxide-Epoxy Paint;

PETROBRASN-1277- Polyamide Zinc Epoxy Base Paint;

PETROBRASN-1514- High-Temperature Indicating Paint;

PETROBRASN-1661 - Zinc Ethyl Silicate Paint;

PETROBRAS N-2137- Determinao de Descontinuidade em Pelcula Seca de Tinta;

PETROBRASN-2231- Paint of Ethyl-Silicate of Zinc-Aluminum;

PETROBRASN-2288- Tinta de Fundo Epxi Pigmentada com Alumnio;

PETROBRASN-2628- High Thickness Epoxy Polyamide Paint;

PETROBRASN-2630 - High Thickness Epoxy Zinc Phosphate Paint;

PETROBRASN-2677- Polyurethane Acrylic Paint;

PETROBRASN-2680 - Surface Tolerant Solvent Free Epoxy Paint for Wet Surfaces;

PETROBRASN-2912- Novolac Epoxy Paint;

PETROBRAS N-2913 - Revestimentos Anticorrosivos para Tanque, Esfera, Cilindro deArmazenamento e Vaso de Presso;

ABNT NBR 15158 - Limpeza de Superfcie de Ao por Compostos Qumicos;
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ABNT NBR 15185 - Inspeo de Superfcies para Pintura Industrial;

ISO 8501-1 - Preparation of Steel Substrates before Application of Paints and RelatedProducts - Visual Assessment of Surface Cleanliness - Part 1: Rust Grades and PreparationGrades of Uncoated Steel Substrates and of Steel Substrates after Overall Removal of

Previous Coatings;

ASTM D 610 - Standard Test Method for Evaluating Degree of Rusting on Painted SteelSurfaces;

NACE No. 5/SSPC-SP 12 - Surface Preparation and Cleaning of Metals by WaterjettingPrior to Recoating;

SSPC SP 11 - Power Tool Cleaning to Bare Metal.

NOTE For documents referred in this Standard and for which only the Portuguese version isavailable, the PETROBRAS department that uses this Standard should be consulted for anyinformation required for the specific application.

3 Application

For the purposes of application of this Standard, the following equipment items are considered:

a) loading arms;b) boilers;c) stacks;d) desalters;e) incinerators;f) fired heaters;g) heat exchangers;

h) reactors;i) regenerators;j) flares;k) towers (except galvanized transmission tower);l) other pressure vessels, as classification defined in PETROBRAS N-268.

NOTE For internal and external anticorrosive coatings of spheres and cylinders for storing LPG andammonia, PETROBRASN-2913shall be followed.

4 General Conditions

4.1 The paint systems standardized herein are established considering the specific conditions towhich they are subject, whether or not there is thermal insulation, and the operating temperature.

4.2 Any promotional painting or shop primer applied, if any, shall be removed just before theapplication of the paint systems specified in this Standard.

4.3 For touching up existing painting, the original system shall be repeated. In case that it is notpossible to carry out abrasive blasting, the surface preparation shall be performed, preferably, bymeans of mechanical rotary tools according to SSPC-SP11 or mechanical treatment to grade St 3 ofISO 8501-1. In the case of touchups to maintenance paint jobs, aluminum pigmented epoxy primeras per PETROBRAS N-2288 shall be used. For condition 4 touchup shall be accomplished with

amide-cured zinc powder epoxy primer, in accordance with PETROBRASN-1277.

4.4 For external coatings, if exceeded the maximum repainting intervals, the recommendationsestablished in PETROBRASN-13 shall be followed.
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4.5 Before preparing the surface to be painted, the entire surface shall be visually inspected, inaccordance with ABNT NBR 15185. Identify spots showing traces of oil, grease or fat and othercontaminants, the degree of corrosion of the surface (A, B, C or D, in accordance with ISO 8501-1), aswell as the points where the painting, if any, is damaged. For painted surfaces, identify the areas that

present painting defects or flaws in accordance with the requirements of ASTM D 610.

4.6 In any of the paint systems specified in this Standard, the surface to be painted shall undergo aphysical-chemical cleaning process as per ABNT NBR 15158, only in the regions where traces of oil,grease, or fat and other contaminants are found during the inspection.

4.7 The surface shall be treated according to Table 1 using abrasive blasting or water jetting.

NOTE Water jetting shall only be used in maintenance services. For new construction, the waterjetting is permitted only if combined with abrasives.

Table 1 - Surface Treatment Method

Specificconditions

Surface TreatmentProcedure

Finish grade forabrasive blasting

(ISO 8501-1)

Finish grade for waterjet ting

(NACE No. 5/SSPC-SP 12)

1, 3, 6 and 7 Sa 2 1/2 (minimum) WJ2 (minimum)

2, 4, 5, 9, 10

Treat the surfaceaccording to

PETROBRAS N-9 Sa 2 1/2 (minimum) -

4.8 On the basis of the equipment with fire proofing coating, the metallic surface shall be blasted to

grade Sa 2 1/2 and a coat of 150 m of surface tolerant solvent free epoxy paint for wet surfaces,PETROBRASN-2680, shall be applied. The time interval for applying the fire proofing coating shall bethe same as required for repainting of the anticorrosive coating ( PETROBRASN-2680).

4.9 For application of paint systems the recommendations of standard PETROBRAS N-13 shall befollowed.

4.10 On weld fillets, complex geometry parts, sharp edges and cavities, the primer shall be applied bybrush, except in the case of zinc ethyl-silicate paint, PETROBRASN-1661, and paint of ethyl-silicateof zinc-aluminum, PETROBRASN-2231.

4.11 For equipments having operating temperatures below 80 C, but for which steam-out is expectedto be carried out, the paint system specified in Condition 2 shall be used.

5 Specific Conditions

5.1 External Painting

5.1.1 Equipment Without Thermal Insulation

5.1.1.1 Condition 1

Environment: dry or humid, with or without salinity, containing or not containing gases derived fromsulfur. Operating temperature: above 15 C and up 80 C.
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5.1.1.1.1 Primer

Apply a coat of high-thickness zinc phosphate epoxy paint, PETROBRAS N-2630, by means of a

roller, brush or gun. The minimum dry film thickness shall be 100 m. The time interval for application

of the finish paint shall be, at least, 16 hours, but not more than 48 hours.

5.1.1.1.2 Finish Paint

Apply a coat of polyurethane acrylic paint, PETROBRAS N-2677, by means of a brush, roller or

conventional gun, with a minimum dry film thickness of 70 m.

5.1.1.2 Condition 2

Environment: dry or humid, with or without salinity, containing or not containing gases derived fromsulfur. Operating temperature: above 80 C and up to 500 C.

Apply a single coating of ethyl silicate of zinc-aluminum paint, PETROBRAS N-2231, by means of aconventional gun (with mechanical agitation) or an airless gun (with mechanical agitation) with a

minimum dry film thickness of 75 m.

5.1.1.3 Condition 3

Equipments made of carbon steel, with refractory lining and/or internal insulation. Operating

temperature: above 200 C.

Apply two coats of high-temperature indicating paint, PETROBRAS N-1514, by means of a roller or

airless gun, with a minimum dry film thickness of 15 m per coat. The maximum time interval betweencoats shall be 24 hours for type I and 16 hours for type II. For operating temperatures between 200 Cand 290 C use type II. For operating temperatures above 290 C use type I.

5.1.1.4 Condition 4

Equipment located along the seashore or on a pier. Operating temperature: from room temperatureand up to 80 C.

NOTE Applicable to particularly aggressive atmospheres , located up to 500 m of the coast or inareas with the accurrence of strong winds, mainly from the sea to the coast, having noticedthe presence of sand and/or high salinity of air (saline fog). The surface shall be cleanedwith fresh water between coats, under a pressure between 1000 psi and 3000 psi.

5.1.1.4.1 Primer

Apply a coat of ethyl-silicate zinc paint, as specified in PETROBRAS N-1661, by means of aconventional gun (with mechanical agitation) or airless gun (with mechanical agitation), with aminimum dry film thickness of 75 m. The time interval for application of the intermediate paint shallbe at least 30 hours, but not more than 48 hours.

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5.1.1.4.2 Intermediate Paint

Apply two coats, the first of iron oxide-epoxy paint, PETROBRAS N-1202, by means of a roller,

conventional gun or airless gun, with minimum dry film thickness of 30 m. After an interval of at least8 hours and up to 72 hours, apply the second coat of high thickness epoxy polyamide paint,

PETROBRASN-2628,by means of a roller, conventional gun or airless gun, with minimum dry filmthickness of 100 m. The time interval between the intermediate paint and the finish paint shall be atleast 16 hours and 48 hours at most.

5.1.1.4.3 Fin ish Paint

Apply a coat of acrylic polyurethane paint, as specified in PETROBRAS N-2677, by means ofconventional or airless gun, with a minimum dry film thickness of 70 m.

5.1.1.5 Condit ion 5

Stacks and flares, with plates having an operating temperature of up to 500 C.

Apply a single coating of ethyl silicate of zinc-aluminum paint, PETROBRASN-2231, by means of an

airless gun (with mechanical agitation) with a minimum dry film thickness of 100 m.

5.1.2 Equipment With Thermal Insulation

5.1.2.1 Condition 6

Environment: dry or humid, with or without salinity, containing or not containing gases derived fromsulfur. Operating temperature: from -45 C and up to 15 C.

Apply two coats of surface tolerant solvent free epoxy paint for wet surfaces, PETROBRASN-2680,

by means of a roller, brush or airless gun, with minimum dry film thickness of 160 m, per coat.

5.1.2.2 Condition 7


Apply a single coating of surface tolerant solvent free epoxy paint for wet surfaces, PETROBRAS

N-2680, by means of a roller, brush or gun. The minimum dry film thickness shall be of 100 m.

5.1.2.3 Condition 8

Environment: dry or humid, with or without salinity, containing or not containing gases derived fromsulfur, in continuous duty. Operating temperature: above 80 C and up to 500 C. In this case, theequipment shall not be painted.

NOTE For operating temperatures between 80 C to 200 C where the equipment will be exposed tolong periods out of operation, with the possibility to result in corrosion, the application ofNovolac epoxy coat, PETROBRASN-2912(Type I), with a minimum dry film thickness of 200

m, is recommended. [Recommended Practice]
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5.2 Internal Painting

5.2.1 Condition 9

Equipment subject to corrosion with a high wear rate (above 0.1 mm/year). Operating temperature: upto 80 C.

Apply a single coating with minimum dry film thickness of 400 m of the type II coating, specified byPETROBRASN-2912, mandatorily by means of an airless gun.

NOTE 1 The application shall be performed on surfaces presenting up to light flash rust level.NOTE 2 Film must be checked against discontinuity using a holiday detector in accordance with

PETROBRAS N-13 andN-2137.

5.2.2 Condition 10

Equipment subject to corrosion with a high wear rate (above 0,1 mm/year). Operating temperature:above 80 C and up to 150 C.

Apply a single coating with minimum dry film thickness of 400 m of the type III coating, specified byPETROBRAS N-2912, mandatorily by means of an airless gun, except for products applied byspatula.

NOTE 1 The application shall be performed on surfaces presenting up to light flash rust level.

NOTE 2 Film must be checked against discontinuity using a holiday detector in accordance withPETROBRAS N-13 andN-2137.

NOTE 3 For conditions of operating temperature above 150 C, the use of alternatives available onthe market shall be evaluated.
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IR 1/1

NDEX OF REVISIONS

REV. A, B, C, D, E, F, G and H

There is no index of revisions.

REV. J

Af fected Parts Descript ion of Alteration

All items Revised

REV. K


All Revised

REV. L


1.4 Inclusion of Recommended Practice indication

2 Exclusion of PETROBRAS N-9

Tabela 1 Revised

4.11 Revised

5.1.1.5 Alteration of the temperature from 120 to 500 C

5.1.2.2 Revised

5.1.2.3 Revised

5.2.1 Notes revised

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Foreword

This Standard is the English version (issued in 12/2011) of PETROBRAS N-2 REV. L 10/2011. In caseof doubt, the Portuguese version, which is the valid document for all intents and purposes, shall beused.

1 Scope

1.1 The objective of this Standard is to establish the procedure for selection of the internal andexternal paint system of industrial equipments.

1.2 The internal anticorrosive coatings are applied on painting of onshore and offshore facilities andexternal coatings only in onshore facilities.

1.3 This Standard is applied to procedures started after its date of issuance.

1.4 This Standard contains Technical Requirements and Recommended Practices.

2 Normative References

The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument applies.

PETROBRAS N-13 - Technical Requirements for Paintwork;

PETROBRAS N-268 - Fabrication of Pressure Vessel;

PETROBRAS N-1202 - Iron Oxide-Epoxy Paint;

PETROBRAS N-1277 - Polyamide Zinc Epoxy Base Paint;

PETROBRAS N-1514 - High-Temperature Indicating Paint;

PETROBRAS N-1661 - Zinc Ethyl Silicate Paint;

PETROBRAS N-2137 - Determinao de Descontinuidade em Pelcula Seca de Tinta;

PETROBRAS N-2231 - Paint of Ethyl-Silicate of Zinc-Aluminum;

PETROBRAS N-2288 - Tinta de Fundo Epxi Pigmentada com Alumnio;

PETROBRAS N-2628 - High Thickness Epoxy Polyamide Paint;

PETROBRAS N-2630- High Thickness Epoxy Zinc Phosphate Paint;

PETROBRAS N-2677 - Polyurethane Acrylic Paint;

PETROBRAS N-2680 - Surface Tolerant Solvent Free Epoxy Paint for Wet Surfaces;

PETROBRAS N-2912 - Novolac Epoxy Paint;

PETROBRAS N-2913 - Revestimentos Anticorrosivos para Tanque, Esfera, Cilindro deArmazenamento e Vaso de Presso;

ABNT NBR 15158 - Limpeza de Superfcie de Ao por Compostos Qumicos;
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4.5 Before preparing the surface to be painted, the entire surface shall be visually inspected, inaccordance with ABNT NBR 15185. Identify spots showing traces of oil, grease or fat and othercontaminants, the degree of corrosion of the surface (A, B, C or D, in accordance with ISO 8501-1), aswell as the points where the painting, if any, is damaged. For painted surfaces, identify the areas that

present painting defects or flaws in accordance with the requirements of ASTM D 610.

4.6 In any of the paint systems specified in this Standard, the surface to be painted shall undergo aphysical-chemical cleaning process as per ABNT NBR 15158, only in the regions where traces of oil,grease, or fat and other contaminants are found during the inspection.

4.7 The surface shall be treated according to Table 1 using abrasive blasting or water jetting.

NOTE Water jetting shall only be used in maintenance services. For new construction, the waterjetting is permitted only if combined with abrasives.

Table 1 - Surface Treatment Method

Specific conditionsFinish grade for

abrasive blasting(ISO 8501-1)

Finish grade for water jetting(NACE No. 5/SSPC-SP 12)

1, 3, 6 and 7 Sa 2 1/2 (minimum) WJ2 (minimum)

2, 4, 5, 9, 10 Sa 2 1/2 (minimum) -

4.8 On the basis of the equipment with fire proofing coating, the metallic surface shall be blasted to

grade Sa 2 1/2 and a coat of 150 m of surface tolerant solvent free epoxy paint for wet surfaces,PETROBRAS N-2680, shall be applied. The time interval for applying the fire proofing coating shall bethe same as required for repainting of the anticorrosive coating ( PETROBRAS N-2680).

4.9 For application of paint systems the recommendations of standard PETROBRAS N-13 shall befollowed.

4.10 On weld fillets, complex geometry parts, sharp edges and cavities, the primer shall be applied bybrush, except in the case of zinc ethyl-silicate paint, PETROBRAS N-1661, and paint of ethyl-silicateof zinc-aluminum, PETROBRAS N-2231.

4.11 For equipments having operating temperatures below 80 C, but for which steam-out is expectedto be carried out, the paint system specified in Condition 2 shall be used.

5 Specific Conditions

5.1 External Painting

5.1.1 Equipment Without Thermal Insulation

5.1.1.1 Condition 1

Environment: dry or humid, with or without salinity, containing or not containing gases derived fromsulfur. Operating temperature: above 15 C and up 80 C.
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5.1.1.1.1 Primer

Apply a coat of high-thickness zinc phosphate epoxy paint, PETROBRAS N-2630, by means of a

roller, brush or gun. The minimum dry film thickness shall be 100 m. The time interval for application

of the finish paint shall be, at least, 16 hours, but not more than 48 hours.

5.1.1.1.2 Fin ish Paint

Apply a coat of polyurethane acrylic paint, PETROBRAS N-2677, by means of a brush, roller or

conventional gun, with a minimum dry film thickness of 70 m.

5.1.1.2 Condition 2


Apply a single coating of ethyl silicate of zinc-aluminum paint, PETROBRASN-2231, by means of aconventional gun (with mechanical agitation) or an airless gun (with mechanical agitation) with a

minimum dry film thickness of 75 m.

5.1.1.3 Condition 3

Equipments made of carbon steel, with refractory lining and/or internal insulation. Operating

temperature: above 200 C.

Apply two coats of high-temperature indicating paint, PETROBRASN-1514, by means of a roller or

airless gun, with a minimum dry film thickness of 15 m per coat. The maximum time interval betweencoats shall be 24 hours for type I and 16 hours for type II. For operating temperatures between 200 Cand 290 C use type II. For operating temperatures above 290 C use type I.

5.1.1.4 Condition 4

Equipment located along the seashore or on a pier. Operating temperature: from room temperatureand up to 80 C.

NOTE Applicable in particularly aggressive conditions caused by winds in the presence of highsalinity of air (salt spray). The surface shall be cleaned with fresh water between coats.

5.1.1.4.1 Primer

Apply a coat of ethyl-silicate zinc paint, as specified in PETROBRAS N-1661, by means of aconventional gun (with mechanical agitation) or airless gun (with mechanical agitation), with aminimum dry film thickness of 75 m. The time interval for application of the intermediate paint shallbe at least 30 hours, but not more than 48 hours.
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